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LC; LFA 1/68
RE 21 050/02.99
Overview of contents
Description Page
Function, section, symbols– General 2– Pressure relief function 2– Pressure reducing function 2 to 3– Pressure sequencing function 3– Cavity and porting pattern 4
Pressure relief function:– Cartridge valve type LC . DB…:
•Ordering details 5•Symbols 5•Technical data 5•Characteristic curves 6 to 11•Seal kits 12•Compression springs 12
– Control cover type LFA . DB…:•Ordering details (general) 13 to 14•Technical data 14•Pilot valves 15•Symbols (basic symbols) 16•R-rings for pilot oil connections 17•Seal kits 17•Fixing screws 17• Orifice dimensions 17
Ordering details, symbols and unit dimensions:– Type DB 18 to 20– Types DBW; DBS 21 to 25– Type DBWD 26 to 28– Type DBU2 29 to 32– Type DBU3D 33 to 37– Type DBE 38– Type DBEM 39 to 42
RE 21 050/02.99
Replaces: 11.96
2-way cartridge valves-pressure functionsCartridge valves type LC...Control covers type LFA...
Nominal size 16 to 100Series 6X; 7XMaximum operating pressure 420 barMaximum flow 7000 L/min
Cartridge valve type LC 25 DB40E-7XControl cover with manual pressure adjustment, electricalunloading type LFA 25 DBW2-7X/315 with built-on directional valve.
H/A/
D 55
93Description Page
Pressure reducing function:– Cartridge valve type LC . DR…:
•Ordering details 43•Symbol 43•Technical data 43•Characteristic curves 44 to 46•Seal kits 47•Compression springs 47
– Control cover type LFA . DR…:•Ordering details (general) 48•Symbol 48•Technical data 49•Pilot valve 49•Symbols (basic symbols) 50•R-rings for the pilot oil connections 51•Fixing screws 51• General dimensions 52
Ordering details, symbols and unit dimensions:– Type DR 53 to 54– Type DRW 55 to 56– Types DREV; DREZ 57 to 58– Types DREWV; DREWZ 59 to 60
Pressure sequencing function:– Control cover type LFA . DZ…:
•Ordering details (general) 61•Symbols (basic symbols) 61•Technical data 62•R-rings for pilot oil connections 62• Seal kits 63•Fixing screws 63• Orifice dimensions 63
Ordering details, symbols and unit dimensions:– Type DZ 64 to 65– Type DZW 66 to 67
RE 21 050/02.99
Rexroth Hydraulics 2/68 LC; LFA
F**
X
A
YB
X** T
B
A
X YX** F**
A
4
6
1
3
2
5
B
Function, section, symbols
General
The 2-way cartridge valves for pressure control functions are pilotoperated poppet or spool valves. The main component designed as acartridge valve (1) is inserted in a cavity bore standardised toDIN ISO 7368 and is sealed by control cover (2).The pilot valve (4) for either manual or electrical proportional pressurecontrol is integrated into the control cover (2) or mounted onto thecontrol cover as a pilot valve with interface connections toDIN 24 340 (2).
By combining the cartridge valve with the control covers differentpressure functions can be realised.
Pressure relief function
Control cover type LFA..DB...
Cartridge valve type LC..DB...The cartridge valve (1) for the pressure relief function (type LC . DB…)is a poppet valve without an area differential (no effective area atport B). The pressure acting at port A is fed via the pilot oil spplyorifice (5) to the spring side (6) of the element. At pressures belowthe setting of pilot valve (4) the forces on spool (3) are balanced andthe spool remains closed due to the spring force. On reaching the setpressure, spool (3) opens and limits the pressure at port A in linewith the pressure-flow characteristics.
Pressure reducing function
a) Normally open: Control cover type LFA..DB...
Cartridge valve type LC..DR...
The cartridge valve for the pressure reducing function is a spool valvewithout an area differential (no effective area at port B).The same types of cover are used as pilot valves as are used for thepressure relief functions (type LFA..D...).
The pressure acting at port A is fed to the spring side of the spool viathe pilot oil supply orifice. Below the performance limit and pressureset at the pilot valve, the spool is pressure balanced and is held openby the spring force, so that oil is free to flow from port B to port A.
On reaching the set pressure, the spool closes and reduces the pressureat port a in line with the pressure-flow characteristics.
LC..DB.D... LC..DB.E...
Type LFA..DB...
Type LC..DB...
e.g.
Type LFA..DB...
Type LC..DR40...
LC; LFA 3/68 Rexroth Hydraulics
RE 21 050/02.99
X YX** F**
M
A
BZ2
X
A
BYZ2 Z1
HD ND
pS
RV
X
A
BYZ2 Z1
Function, symbols
b) Normally closed: Control cover type LFA..DR...
Cartridge valve type LC..DB40D...
For the pressure reducing function with opening characteristics apressure relief valve cartridge (type LC..DB40D...) and a control coverwith a pressure reducing valve (type LFA..DR...) as the pilot valve areused. The pilot oil is fed from port A via the pilot supply orifice andthe open pressure reducing pilot valve to side B.The main spool opens and allows free flow from port A to port B.
On reaching the set pressure, the spool closes and reduces the pressureat port B in line with the pressure-flow characteristics. Possible excesspressures occurring on the secondary side are led away to tank viathe third port of the pilot valve. By fitting a directional valve, an addi-tional isolating function can also be attained (type LFA..DRW...).
Example 2: (circuit for the pressure dependent sequencing of a2nd system)With this circuit, oil is allowed to flow into system 2 when the pressurein system 1 has reached a pre-set value. The pilot oil supply is internalfrom port A of the main valve.
System 2
Typical circuits
Example 1: (Circuit for the pressure dependent unloading of thelow pressure system)In the circuit shown, the system is fed by a high pressure pump anda low pressure pump. The system pressure pS acts externally from thehigh pressure side via the pilot oil port X on the pilot valve which, onreaching the set pressure, switches the low pressure side to give zeropressure circulation. The check valve RV (not included within the scopeof supply) prevents the high pressure system from flowing into thelow pressure system which is now at zero pressure.
Pressure sequencing function
Control cover type LFA..DZ...Cartridge valve type LC..DB...
This function enables a pressure-dependent sequencing of a secondsystem.
The required sequencing pressure is set by the pilot valve which isintegrated into the control cover.The pilot oil supply may be either external (pilot oil port X) or internal(from port A via pilot oil port X or Z2).
The spring chamber of the pilot control is drained at zero pressurevia ports Y or Z1 to tank.
System 1
e.g.
Type LFA..DR...
Type LC..DB40D...
e.g.
Type LFA..DZ...XY
Type LC..DB20D...
e.g.
Type LFA..DZ...Y
Type LC..DB20D...
When the pressure set at the pilot control spring is reached, the pilotvalve switches and unloads the spring chamber of the main valve totank. The main spools opens and makes the connection from port Ato B possible.
In model LFA..DZW..., the required spool position may be selected bymeans of an electrically operated pilot valve (not included within thesupply of control cover LFA..DZW...) in addition to the normal hydrauliccontrol.
RE 21 050/02.99
Rexroth Hydraulics 4/68 LC; LFA
=X
=Y
=Z
Rmax 4
Rmax 8
RZ 10
L1
L2±0,2
L5±0,2
L4±0
,2L4
±0,2
L4±0,2L4±0,2
L3±0
,2
L1
4 x D5; H4
ØD7H13; 10 ØD6 max.(X,Y,Z1,Z2)
Z1
YX
Z2
L2±0
,2L5±0
,2
ØD6 max.(X,Y,Z1,Z2)
ØD7H13; 10
5
8L3±0,2
6
8 x D5; H4
ØD7H13; 10
ØD6 max.(X,Y,Z1,Z2)
L2±0
,3
L1
35°22,5°
45°
Z1
Y
Z2
X
5
X
Y
AØD1H7
W
T
H8 1
5°
H1(
H1*
)
ØD
3(D
3*)
15°
H9
A
B
ØD2
ØD4H7
H7
H6
H5
H3±
0,1
H2+
0,1
A0,05
Z
Z
Z
7 1
7 13 2 4
Installation cavity and porting pattern to DIN ISO 7368 (Dimensions in mm)
NS 80, 100
NS 16 to 63
1 Depth of fit2 Reference dimension
3 For diameters of port B other than ØD3 or (ØD3*), the distancefrom the cover mounting surface to the centre of this hole mustbe calculated.
4 Port B may be moved about the cental axis of port A. Care musthowever be taken to ensure that the fixing holes and controlholes are not damaged.
5 Drilling for location pin (cover location pin fitted toDIN 24 342)
6 Note on NS 16 porting pattern:Length L1 (axis x–y drilling) is 80 mm.
7 For Ø ≤ 45 mm → fit H8 is permitted!8 Drilling for locating pin with functions as a main pressure relief
valve (cover locating pin has to be appropriately relocatedduring assembly)
1) max. dim.
NS 16 25 32 40 50 63 80 100
ØD1H7 32 45 60 75 90 120 145 180ØD2 16 25 32 40 50 63 80 100ØD3 16 25 32 40 50 63 80 100
(ØD3*) 25 32 40 50 63 80 100 125ØD4H7 25 34 45 55 68 90 110 135ØD5 M8 M12 M16 M20 M20 M30 M24 M30
ØD6 1) 4 6 8 10 10 12 16 20ØD7H13 4 6 6 6 8 8 10 10
H1 34 44 52 64 72 95 130 155(H1*) 29.5 40.5 48 59 65.5 86.5 120 142
H2 56 72 85 105 122 155 205 245H3 43 58 70 87 100 130 175±0,2 210±0,2
H4 20 25 35 45 45 65 50 63H5 11 12 13 15 17 20 25 29H6 2 2.5 2.5 3 3 4 5 5H7 20 30 30 30 35 40 40 50H8 2 2.5 2.5 3 4 4 5 5H9 0.5 1 1.5 2.5 2.5 3 4.5 4.5L1 65/80 85 102 125 140 180 Ø250 Ø300L2 46 58 70 85 100 125 Ø200 Ø245L3 23 29 35 42.5 50 62.5 – –L4 25 33 41 50 58 75 – –L5 10.5 16 17 23 30 38 – –W 0.05 0.05 0.1 0.1 0.1 0.2 0.2 0.2
LC; LFA 5/68 Rexroth Hydraulics
RE 21 050/02.99
A
B
A
B
A
B
A
B
Pressure relief function
Ordering details: pressure relief cartridge valves (without control cover)
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
7X = (NS 16 to 63) Series 70 to 79(70 to 79: unchanged installation and connection dimensions)
6X = (NS 80 and 100) Series 60 to 69(60 to 69: unchanged installation and connection dimensions)
E = Poppet valve without orifice (standard)D = Spool poppet valve without orifice (standard)A = Poppet valve with orificeB = Spool poppet valve with orifice
Nominal size 16 = 16Nominal size 25 = 25Nominal size 32 = 32Nominal size 40 = 40Nominal size 50 = 50Nominal size 63 = 63Nominal size 80 = 80Nominal size 100 = 100
Cracking pressure approx. 0 bar (without spring) = 00Cracking pressure approx. 2 bar = 20Cracking pressure approx. 3 bar = 30 1)
Cracking pressure approx. 4 bar = 40Cracking pressure approx. 5 bar = 50 2)
Cracking pressure approx. 8 bar = 80 3)
(Series 7X)
(Series 6X)
LC DB
Preferred types and standard components arehighlighted in the RPS (Rexroth Price list Standard).
1) Cracking pressure 3.0 bar only with NS16 for fitting a pilotoperated pressure relief valve type DBC . -5X/…SO187 (seecatalogue sheet RE 25 802)
2) Only with NS 16, 25 and 323) Special installation area required (see page 12)
Symbols: cartridge valves (for versions see ordering details)
Poppet valve without orificeVersion „E“
Spool poppet valve with orificeVersion „A“
Spool poppet valve without orificeVersion „D“
Spool poppet valve with orificeVersion „B“
Pressure fluid mineral oil (HL, HLP) to DIN 51 524 1);fast bio-degradable pressure fluids toVDMA 24 568 (also see RE 90 221); HETG (rape seed oil) 1);HEPG (polyglycole) 2); HEES (synthetic ester) 2);other pressure fluids on request
Pressure fluid temperature range °C – 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm2/s 2.8 to 380
Degree of contamination Maximum permissible degree of contamination of the pressurefluid is to NAS 1638 class 9. We, therefore, recommend a filterwith a minimum retention rate of ß10 ≥ 75.
2-way cartridge valve
Max. operating pressure – Ports A and B bar 420
Max. flow (recommendation) NS16 NS25 NS32 NS40 NS50 NS63 NS80 NS100
– Poppet valve cartridge „E“ and „A“ L/min 300 450 600 1000 1600 2500 4500 7000
– Spool valve cartridge „D“ and „B“ L/min 175 300 450 700 1400 1750 3200 4900
Technical data (for applications outside these parameters, please consult us!)
1) suitable for NBR and FKM seals2) only suitable for FKM seals
RE 21 050/02.99
Rexroth Hydraulics 6/68 LC; LFA
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100 150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100 150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100 150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100 150 200
100
150
200
250
300
Characteristic curves: nominal size 16 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure isincreased to the pressure being applied at port B.
Manual pressure adjustment, type LFA 16 DB… and type LFA 16 DBW…
Type LC 16 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 16 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 16 DBE…
Type LC 16 DB.E… (with poppet valve)
Low
est s
etta
ble
pres
sure
in b
ar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 16 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
ein
bar →
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
LC; LFA 7/68 Rexroth Hydraulics
RE 21 050/02.99
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 400150 250 35050
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 40050 150 250 350
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 400150 250 35050
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 40050 150 250 350
Characteristic curves: nominal size 25 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characterisitc curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure isincreased to the pressure being applied at port.
Manual pressure adjustment, type LFA 25 DB… and type LFA 25 DBW…
Type LC 25 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 25 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 25 DBE…
Type LC 25 DB.E… (with poppet valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 25 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Low
est s
etta
ble
pres
sure
in b
ar →
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
RE 21 050/02.99
Rexroth Hydraulics 8/68 LC; LFA
50
350
0
100
150
200
250
300
600100 200 300 400 500100 600
5
10
15
0
..DB40..
..DB20..
200 300 400 500
50
350
0
100
150
200
250
300
600100 200 300 400 500100 600
5
10
15
0
..DB40..
..DB20..
200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..50
350
0
100
150
200
250
300
600100200 300 400 500 200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..50
350
0
100
150
200
250
300
600100200 300 400 500 200 300 400 500
Characterisitic curves: nominal size 32 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressue isincreased to the pressure being applied at port B.
Manual pressure adjustment, type LFA 32 DB… and type LFA 32 DBW…
Typ LC 32 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 32 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 32 DBE…
Type LC 32 DB.E… (with poppet valve)
Low
est s
etta
ble
pres
sure
in b
ar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 32 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
LC; LFA 9/68 Rexroth Hydraulics
RE 21 050/02.99
15
20
10
5
0 200 400 600 800 1000
..DB40..
..DB20..
1000800600400200
200
250
350
300
150
100
50
0
15
20
10
5
0 200 400 600 800 1000 1000800600400200
200
250
350
300
150
100
50
0
..DB20..
..DB40..
15
20
10
5
0 200 400 600 800 1000
..DB20..
1000800600400200
200
250
350
300
150
100
50
0
..DB40..
15
20
10
5
0 200 400 600 800 1000
..DB40..
..DB20..
1000800600400200
200
250
350
300
150
100
50
0
Characteristic curves: nominal size 40 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure isincreased to the pressure being applied at port.
Manual pressure adjustment, type LFA 40 DB… and type LFA 40 DBW…
Type LC 40 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 40 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 40 DBE…
Type LC 40 DB.E… (with poppet valve)
Low
est s
etta
ble
pres
sure
in b
ar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 40 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
RE 21 050/02.99
Rexroth Hydraulics 10/68 LC; LFA
500 1000 1500 2000
15
20
10
5
0
..DB40..
25
30
..DB20..
200
250
350
300
150
100
50
0 500 1000 1500 2000
500 1000 1500 2000
15
20
10
5
0
..DB40..
..DB20..
30
500 1000 1500 2000
200
250
350
300
150
100
50
0
25
15
20
10
5
0 500 1000 1500 2000
25
30
500 1000 1500 2000
200
250
350
300
150
100
50
0
..DB20..
..DB40..
500 1000 1500 2000
200
250
350
300
150
100
50
02000500 1000 1500
15
20
10
5
0
30
..DB20..
..DB40..
25
Characteristic curves: nominal size 50 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure isincreased to the pressure being applied at port B.
Manual pressure adjustment, type LFA 50 DB… and type LFA 50 DBW…
Type LC 50 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→Type LC 50 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 50 DBE…
Type LC 50 DB.E… (with poppet valve)
Low
est s
etta
ble
pres
sure
in b
ar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 50 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
LC; LFA 11/68 Rexroth Hydraulics
RE 21 050/02.99
500 1000 1500 20000 2500
15
20
10
5
..DB40..
..DB20..
30
200
250
350
300
150
100
50
500 1000 1500 20000 2500
25
500 1000 1500 20000 2500500 1000 1500 20000 2500
..DB40..
200
250
350
300
150
100
50
15
20
10
5
30
..DB20..
25
0 2500500 1000 1500 20000 2500
15
20
10
5
30
200
250
350
300
150
100
50
..DB20..
..DB40..
500 1000 1500 2000
25
2500
15
20
10
5
25
30
200
250
350
300
150
100
50
0500 1000 1500 20000 2500 500 1000 1500 2000
..DB20..
..DB40..
Characteristic curves: nominal size 63 (measured at ν = 41 mm2/s and ϑ = 50 °C)The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure isincreased to the pressure being applied at port B.
Manual pressure adjustment, type LFA 63 DB… and type LFA 63 DBW…
Type LC 63 DB.E… (with poppet valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 63 DB.D… (with poppet spool valve)
Bypa
ss p
ress
ure
1) in
bar
→Lo
wes
t set
tabl
e pr
essu
re 2
) in
bar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Electrical proportional pressure adjustment, type LFA 63 DBE…
Type LC 63 DB.E… (with poppet valve)
Low
est s
etta
ble
pres
sure
in b
ar →
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Type LC 63 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inle
t pre
ssur
e in
bar
→
Low
est s
etta
ble
pres
sure
in b
ar →
1)
2)
1)
2)
RE 21 050/02.99
Rexroth Hydraulics 12/68 LC; LFA
Seal kits for cartridge valves type LC...Nominal size Material no.
NBR seals FKM seals16 00313104 0031310725 00313105 0031310832 00313106 0031310940 00873022 00873025
Nominal size Material no.NBR seals FKM seals
50 00873023 0087302663 00873024 0087302780 00314058 00314067100 00314059 00314068
Compression springs for cartridge valves type LC...NS Spring dimensions Cracking pressure Material
in mm in bar no.
10.2/1.3 x 40.5/8.0 2.0 0006274710.0/1.6 x 38.2/9.0 3.0 00062753
16 9.8/1.7 x 38.0/9.0 4.0 000627549.7/1.9 x 35.7/8.5 5.0 000627579.2/2.4 x 60.5/14.5 8.0 1) 00082073
15.3/2.25 x 55.0/8.0 2.0 0006276214.9/2.7 x 53.4/8.5 3.0 00062764
25 14.7/2.8 x 53.5/8.5 4.0 0006282014.6/3.0 x 52.5/8.5 5.0 00062819
14.1/3.5 x 78.5/12.0 8.0 1) 0008207219.6/2.8 x 69.5/7.5 2.0 0006281319.2/3.2 x 71.0/8.5 3.0 00062783
32 19.1/3.4 x 72.0/9.5 4.0 0006281019.1/3.5 x 72.8/9.0 5.0 0006280518.5/4.0 x 109/14.5 8.0 1) 00082071
NS Spring dimensions Cracking pressure Materialin mm in bar no.
25.9/4.25 x 63.0/6.0 2.0 0020667540 25.7/4.5 x 68.5/6.0 4.0 00206673
24.8/5.3 x 105.0/10.0 8.0 1) 0020667133.2/5.0 x 82.0/5.5 2.0 00206684
50 32.8/5.3 x 92.0/6.5 4.0 0020668131.7/6.5 x 137.0/10.5 8.0 1) 0020668040.6/6.5 x 108.0/7.0 2.0 00206690
63 40.7/6.5 x 127.5/7.5 4.0 0020669238.6/8.5 x 183.5/11.5 8.0 1) 00206689
80 48.5/8 x 138/7.5 2.0 0001235349/8 x 152.5/7.5 4.0 00024113
100 52.3/9.5 x 176/9.5 2.0 0001238552.3/9.5 x 195.5/9.5 4.0 00024483
1) These springs require an additional installation length.When using standard control covers an additional sandwichplate type LFA..D22... must be used.
Exception:Control cover type “D“ can be replaced by type LFA..D8-../F (nosandwich plate required).
LC; LFA 13/68 Rexroth Hydraulics
RE 21 050/02.99
LFA A... B...
4
6
7
A...
B...8
5
General notes on the ordering details for control covers
1 2 3 4 5 6 7 8 9
Nominal size Type 1) Control Series Pressure rating in bar Seal Pagetype for nominal sizes material
16 25 32 40 50 63 80 100 16 to 32 40 to 100
• • • • • • 7X
• • 6X
025 025• • • • • • • • DB 050 050 18 to 20
100 100
200 200• • • • • • • • DBW 315 315 21 to 25
420 400
025; 050;• • • • • DBS 100; 200; 21 to 25
315; 400
025 025050 050
• • • • • • • • DBU2A 100 100 29 to 32
• • • • • • • • DBU2B 200 200 29 to 32
315 315420 400
• • • • • • DBE 38
025; 050; 025; 050;• • • • • • • • DBEM 100; 200; 100; 200; 39 to 42
315; 420 315; 400
For o
rder
ing
deta
ils, s
ee p
ages
giv
ing
deta
ils o
f the
indi
vidu
al c
over
var
iatio
ns
DB2DBmax DB1
Types of adjuster for pressure relief valves
1 = Rotary knob2 = Hexagon with protective cap3 = Locable rotary knob with scale
(H-lock to automotive industry standards)4 = Rotary knob with scale, not lockable
Series7X = Series 70 to 79 and
6X = Series 60 to 69
(unchanged installation and connection dimensions)
Pressure ratingsDependent on size and permissible working pressureof the pilot valve. For further details see orderingdetails for the control cover.
Pressure data for DB1, only required for types DBU2and DBU3D
Pressure data for DB2, only required for types DBU3DOrdering example for type DBU3D…/315* A 100 B 200 (DB max. /DB1/DB2)*DB max. always first
1) For functions, see selection table on page 15
• = available
26 to 28• • • • • • • • DBWD
33 to 37• • • • • • • • DBU3D
The control covers are always fitted with a, optimised on our test rig,standard orifice. Orifice details are therefore not required in the typecode. Deviating operating conditions could make it necessary to matchthe orifice size. The orifices are of the threaded type.
Orifice as shown within the main symbol
Preferred types and standard components arehighlighted in the RPS (Rexroth Price list Standard).
RE 21 050/02.99
Rexroth Hydraulics 14/68 LC; LFA
Pressure fluid mineral oil (HL, HLP) to DIN 51 524 1);fast bio-degradable pressure fluids toVDMA 24 568 (also see RE 90 221); HETG (rape seed oil) 1);HEPG (polyglycole) 2); HEES (synthetic ester) 2);other pressure fluids on request
Pressure fluid temperature range °C – 30 to + 80 for NBR seals
– 20 to + 80 tor FKM seals
Viscosity range mm2/s 2.8 to 380
Degree of contamination Maximum permissible degree of contamination of the pressurefluid is to NAS 1638 class 9. We, therefore recommend a filterwith a minimum retention rate of ß10 ≥ 75.
Max. operating pressure bar 420 Attention: pmax of the pilot control valve is to be taken into account!
Technical data (for applications outside these parameters, please consult us!)
1) suitable for NBR and FKM seals2) only suitable for FKM seals
General notes on the ordering details for control covers: pilot control valve (max. operating pressure)
1) Possible pressure stages: 25, 50, 100, 200, 315, 4202) Possible pressure stages: 25, 50, 100, 200, 315, 4003) Possible pressure stages: 50, 100, 200, 315, 350
1 = G 1/4 threaded connection T; special poppet
Pilot control valve Control cover Max. operating pressure in barY, T
Type Catalogue NS Type X For pressuresheet no. control Static
DBD. 2 K2X/… 1) on request 16 to 32 DB, DBW, DBWD, 420 315 •
DBD. 6 K1X/… 2) 25 402 40 to 63 DBU2., DBU3D, 400 315 •
DBD. 10 K1X/… 2) 25 402 80, 100 DBEM, DBS 400 315 •
.WE 6 … 23 178 16 to 63 DBW, DBWD, 350 210 (=); 160 (~) •
.WE 10 … 23 327 80, 100 DBU2., DBU3D 315 210 (=); 160 (~) •
M-3SEW 6 … 22 058 16 to 63 DBW, DBS 420 100 •
M-3SED 6 … 22 049 16 to 63 DBW, DBS 315 X-40 •
M-3SEW 10 … 22 075 80, 100 DBW, DBS 420 100 •
M-3SED 10 … 22 045 80, 100 DBW, DBS 315 X-40 •
DBET-5X/.G24-1 3) 29 165 16 to 32 DBE, DBEM 350 100 •
DBET-5X/.G24… 29 165 40 DBE, DBEM 350 100 •
DBET-5X/.YG24-1 3) on request 50 to 100 DBE, DBEM 350 100 •
DBETR… on request 16 to 100 on request
Incl
uded
inty
pe c
ode
Has
to b
esp
ecia
llyor
dere
d
Zero
pre
ssur
e (u
p to
≈ 2
bar
) Note:
By combining a 2-way cartridge valve with a pilot valve, various valvefunctions may be implemented.The following components may be considered with porting patternform A6 (up to NS63) and form A10 (NS 80 to 100) to DIN 24 340.Valve fixing screws are included within the control cover scope ofsupply.
Fixing screws: S.H.C.S. to DIN 912-10.9
Pilot control valve Dimensions Tightening torqueType in Nm
M-3SEW 6 … M5 x 45 8.9M-3SEW 10 … M6 x 40 15.5M-3SED 6 … M5 x 50 8.9
M-3SED 10 … M6 x 40 15.5
Pilot control valve Dimensions Tightening torqueType in Nm
.WE 6 … M5 x 50 8.9.WE 10 … M6 x 40 15.5DBET … M5 x 30 8.9
LC; LFA 15/68 Rexroth Hydraulics
RE 21 050/02.99
= available
BA
P Ta a b
BA
P Ta b0a b
Pilot control valves (selection table)D
irect
iona
l val
ve u
nloa
ding
DBW
DBS
DBWD
DBU2A
DBU2B
DBU3D
3WE6B9-...
M-3SE.6C...
4WE6D...
M-3SE.6U...
3WE10B9-...4WE10D...
M-3SE.6C...
M-3SE.6U...M-3SE.10C./...
M-3SE.10U./...3WE6B9-...3WE10B9-...
3WE6A-...4WE6M..
3WE10A...4WE10M...4WE6H...
4WE10H...4WE6D...
4WE10D...4WE6D...4WE10D...
4WE6H...4WE10H...
4WE6E...4WE10E...4WE6D...
4WE10D...
open
DB function
open
DB function
open
DB function
openDB function
DB function
closed
Isol
atin
g fu
ncti
on
16to32
40to63
80and100
Nom. size Type Pilotcontrolvalve
Manual pressure setting Symbols(see
page 16)
Position "a" Position "b"
Without directional valve
DB function
open
DB function
open
DB function
open
DB function
open
closed
DB function
open
DB1 function
open
open
DB1 function
DB1 function
DB max. function
open
DB max. function
DB1 function
without max. pressure safety limitation
with max. pressure safety limitation
Proportional pressure settingversion
Open = bypass circuitClosed = cartridge valve is hydraulically blocked
DB function = pressure relief function
Prop
orti
onal
valv
es3
pres
sure
sta
ges
2 pr
essu
re s
tage
s
DB max. function
DB1 function
DB2 function
Position "a" Position "0" Position "b"
DBE
DBEM
DBET-5X/...
DBET-5X/...
With directional valve
1DB
2 3
3
4
5
6
7
8
9
RE 21 050/02.99
Rexroth Hydraulics 16/68 LC; LFA
F**X
X
A
YB
X** TP T
A B
D**
F**
X
X
A
Y
Y
B
X**
P**
T
a
P T
A B
D**
F**
X
A
Y
Y
B
a
X
A**
P T
A
F**
X
A
YB
X
P**B
D**Y
F**X
A
Y
Y
B
X**
B**P T
A Ba
X
F**
X
A
YB
D**P**
P T
A Ba
DB max
DB 1
B
A T
P**
F**
X
A
YB
D**P**
P T
A Ba
DB max
DB 1
A T
X**
DB 2
X
A
YB
D**P**
X**YX
X
A
YB
D**P**
X**YX
F**
P T
Symbol overview (basic symbols), pressure relief function
Valid symboles are shown in the following type descriptions!
1 2 3
4 5 6
7 8 9
LFA..DB.-../..NS16 to 100 LFA..DBW.-../..NS16 to 32 LFA..DBW.-../..NS40 to 100
LFA..DBS.-../..NS40 to 100 LFA..DBWD.-../..NS16 to 100 LFA..DBU2A.-../..NS16 to 100
LFA..DBU3D.-../..NS16 to 100 LFA..DBE-../..NS16 to 63 LFA..DBEM-../..NS16 to 100
see pages 18 to 20 see pages 21, 22 see pages 21 to 25
see pages 21 to 25 see pages 26 to 28 see pages 29 to 32
see pages 33 to 37 see page 38 see pages 39 to 42
LC; LFA 17/68 Rexroth Hydraulics
RE 21 050/02.99
R-rings dimensions for ports X, Y (included within the scope of supply)
NS Dimensions Material no.mm NBR FKM
16 8.41 x 1.40 x 1.78 00025407 00025408
25 9.81 x 1.50 x 1.78 00017453 00017610
32 11.18 x 1.60 x 1.78 00017455 0001761140, 50 13.00 x 2.30 x 2.62 00017457 00017617
63 18.72 x 2.62 x 2.62 00024445 00024446
80 26.57 x 3.53 x 3.53 00017466 00017630
100 34.52 x 3.53 x 3.53 00017472 00017633
Seal kits for control cover type LFA..
Seal kit for LFA... Material no.
NS 16 NS 25 NS 32 NS 40NBR FKM NBR FKM NBR FKM NBR FKM
..DB..; DBW..; ..DBS....DBWD..; ..DBEM.. 00313955 00313956 00313957 00313958 00313802 00313803 00313722 00313723
..DBU2..; ..DBU3.. 00313709 00313710 00313711 00313712 00313713 00313714 00313715 00313716
DBE.. 00313701 00313702 00313703 00313704 00313705 00313706 00313707 00313708
Seal kit for LFA... Material no.
NS 50 NS 63 NS 80 NS 100
NBR FKM NBR FKM NBR FKM NBR FKM
..DB..; DBW..; ..DBS....DBWD..; 00313724 00313725 00313726 00313727 00310533 00313054
..DBU2..; ..DBU3.. 00313717 00313718 00313719 00313720 00312090
..DBE.. 00313897 00313898 00313899 00313700
..DBEM.. 00313893 00313894 00313895 00313896 00311930 00312219
M8 x 1 tapered
M8 x 1 tapered (A**, B**, P**, D**) or G 1/4 (X**, F**)
M6 tapered
D-orifices for type ..DBE.. NS 25 to 63Orifices for NS 80, 100
Other built-in orifices
Orifice thread size
Fixing screws (included within the scope of supply)
S.H.C.S. to DIN 912-10.9
NS Qty. Dimensions Tightening torque in Nm
16 4 M 8 x 45 32
25 4 M 12 x 50 11032 4 M 16 x 60 270
40 4 M 20 x 70 520
50 4 M 20 x 80 520
63 4 M 30 x 100 180080 8 M 24 x 120 900
100 8 M 30 x 120 1800
RE 21 050/02.99
Rexroth Hydraulics 18/68 LC; LFA
F**X
X
A
YB
X** T
D**
Ø 3
2
3
82
91
4252 max
9 43
DBD.2K.
L4
L2
4
G 1
/4 /1
2H
2H
1H
3
D
X F Y
10 SW 22 SW 10 10480 max
2L1
L3
188
6; 71
10 5
H4Ø
35 Ø 4
0
0
Control cover with manual pressure adjustment
1 2 3 4 5 6 9NS 16 to 100LFA DB
Nominal size 16Nominal size 25Nominal size 32Nominal size 40Nominal size 50Nominal size 63
Nominal size 80Nominal size 100
= 16= 25= 32= 40= 50= 63= 80= 100
Series 7X
Series 6X
Adjuster typeRotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3(H-lock to automotive industry standards)Rotary knob with scale not lockable = 4
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings
6X = Series 6X (NS 80 and 100)
7X = Series 7X (NS 16 to 63)
NS 16, 25 ,32 LFA..DB.-7X/.. NS 16, 25, 32
with NS 32
with NS 16, 25
only withversion LFA 32 DB.
1 Port X optionally as threaded port3 Locating pin4 Adjuster type "2"5 Adjuster type "1"
6 Adjuster type "3"7 Adjuster type "4"8 Space require to remove
the key
9 Name plate10 Lock nut
NSX**1)
F**1)
D**1)
H1H2H3H4L1L2L3L4
160.81.0
401715196580
36.532.5
250.81.0
40192419858549
45.5
32
1.20.850262826
10010056.553
** Orifice - Ø1) Orifice M6 tapered
Dimensions in mm
A/F 22 A/F 10
LC; LFA 19/68 Rexroth Hydraulics
RE 21 050/02.99
SW6
124
SW19
SW30
SW32
10
94 max
204
D1/
T1
H2
H1
H3
Ø 3
5
H4
6; 75
8DBD.6K.. 4
94 max
72
4
D
XF
Y
D1/T1 2
3
X Y
L3L4L5
9
L1
L2
1
Ø 6
0
Ø 6
0
F**X
X
A
YB
T
D**Y
4
G1/
2; 1
4
H2H
1H
3
Ø 35
H4
DBD.6K..
D
XF
Y
3
X Y
90
90
9
L1
4
G1/
2; 1
4
4
94 m
ax
94 m
ax124
208
2
6; 7
Ø 60
Ø 60
5
72
1
SW6SW19
SW30SW3210
LFA..DB.-7X/..NS 40, 50, 63
Control cover with manual pressure adjustment
NS 40, 50
NS 63
1 Port X optionally as threaded port
2 Port Y optionally as threaded port3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required to remove key9 Name plate
10 Lock nut
NSF** 1)
D** 1)
D1H1H2H3H4 L1L2L3L4L5T1
401.21.0
G1/460283227
1256989766012
501.52.0
G1/2 68
19,5343514080105847014
632.02.5
823050
45.5180
** Orifice - Ø1) Orifice M6 tapered
Dimensions in mm
A/F 32
A/F 30
A/F 19
A/F 6
A/F 19
A/F 32
A/F 6
A/F 30
RE 21 050/02.99
Rexroth Hydraulics 20/68 LC; LFA
F**X
X
A
YB
T YX**
2,5
H2
H1
H3
Ø 38
5
DBD.10K..
3
9
190
max
90 m
ax120
20
8
2
6; 7
4 68
2,5
L8
YFX
D2
YFX
H4
G1/2; 14
1 G1/2; 14
5
G1/2; 14
SW36SW30
SW19
SW6
104
Ø 60
Ø 60
Control cover with manual pressure adjustment
NS 80, 100
LFA...DB.-6X/...NS 80, 100
1 Port X optionally as threaded port
2 Port Y optionally as threaded port
3 Locating pin
4 Adjuster type "2"5 Adjuster type "1"
6 Adjuster type "3"
7 Adjuster type "4"
8 Space required to remove key
9 Name plate
10 Lock nut
1003.02.5300 10038515850
803.02.525010038455850
NSX** 1)
F** 1)
D2H1H2H3H4L8
** Orifice - Ø1) Orifice G 1/4 tapered
Dimensions in mm
A/F 19
A/F 30A/F 36 A/F 6
LC; LFA 21/68 Rexroth Hydraulics
RE 21 050/02.99
P T
A Ba
P T
A
P T
A
P T
A
P T
A Ba
P T
A
P T
A
D**
F**
X
X
A
Y
P
Y
T
A B
B
X**
P**
T
a
D**
F**
X
A
Y
P
Y
T
A B
B
a
X
A**
F**
X
A
Y
P T
A
BX
P**B
D**Y
Control cover with manual pressure adjustment, with electrical unloading
1 2 3 4 5 6 9NS 16 to 100
LFANS 16NS 25NS 32NS 40NS 50NS 63
Series7X
= 16= 25= 32= 40= 50= 63
NS 80NS 100
Series6X
= 80= 100
Control cover type
For mounting a = DBWdirectional spool (NS 16 to 100)or directional poppet valve (for NS 16, 25, 32)
For mounting a directional poppet valve = DBS(for NS 40, 50, 63, 80, 100)
Adjuster type
Rotary = 1Hexagon with protective cap = 2
Lockable rotary knob with scale = 3(H-lock to automotive industry standards)
Rotary knot with scale not lockable = 4
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25, 32
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings(take max. perm. pressure of pilot valve into account)
6X = Series 6X (NS 80 and 100)7X = Series 7X (NS 16 to 63)
NS 16 to 63
LFA..DBW.-7X/...NS 16, 25, 32
4WE 6 D../.. 3WE 6 B9-../.. M-3SED 6 C../350…
M-3SEW 6 C../420…M-3SED 6 U../350…M-3SEW 6 U../420…
4WE 6 D../.. 3WE 6 B9-../..M-3SED 6 U../350…M-3SEW 6 U../420… M-3SED 6 C../350…
M-3SEW 6 C../420…
LFA..DBS.-7X/...NS 40, 50, 63
LFA..DBW.-7X/...NS 40, 50, 63
RE 21 050/02.99
Rexroth Hydraulics 22/68 LC; LFA
85 6;7
18
10480 max
Ø 3
2
Ø 4
0
3
21
98
0
SW 10SW 22
4252 max
40,5L5
L6
G 1/4 /12
L2
4
32,5
L34
L12
X
PA
T
BY
L4Ø
35
1042
3 109
H3
H1
H2
G 1
/4 /1
2
D
FX
PA
Y H4
1
DBD.2K
11 A
Control cover with manual pressure adjustment, for electrical unloading
NS 16, 25, 32
Directional spool valve . WE 6...
Directional poppet valve
M-3SEW 6 ../…
Directionalpoppet valveM-3SED 6 U
Dimensions in mm
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws are includedwithin the control cover scopeof supply
** Orifice - Ø1) Orifice M6 tapered
UC
NS P**1) X**1) F**1) D**1) H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 2732 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
A/F 22 A/F 10
LC; LFA 23/68 Rexroth Hydraulics
RE 21 050/02.99
32,5
SW32104
H2H
1H
3
H4
6; 75
DBD.6K..
94 max
72
D
XF
Y
3
X Y
L5
L4
L7
2
L1
L3
A
A
B AP
T
94 max
124 20
31
L3*
L6 40,5 9
11
4
1
SW30 SW19
SW6
H5
H2*
D
F
P
X
A
Ø 6
0
Ø 6
0
Ø 3
5
8
D1/T1
D1/T1
D1/
T1
PB
A/F 19
Control cover with manual pressure adjustment, for electrical unloading
NS 40, 50 Dimensions in mm
* Dimensions for control cover LFA..DBS..** Orifice - Ø1) Orifice M6 tapered
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate10 Lock nut
11 Valve fixing screws areincluded within the controlcover scope of supply
LFA..DBS.-../...LFA..DBW.-7X/...
Directionalpoppet valve
M-3SEW 6 ../…UC
Dirrectionalpoppet valveM-3SED 6 U
Directional spool valve . WE 6 ...
NS A**1) P**1) F**1) D**1) D1 T1 H1 H2 H2* H3 H4 H5 L1 L3 L3* L4 L5 L6 L7
40 0.8 1.2 1.2 1.0 G1/4 12 60 46 17 32 27 40 125 62.5 69 76 68 43.5 4750 0.8 1.5 1.5 2.0 G1/2 14 68 51 19.5 34 35 50 140 67.5 80 84 74.5 51 54.5
A/F 6
A/F 30A/F 32
RE 21 050/02.99
Rexroth Hydraulics 24/68 LC; LFA
B AP
T
4
G1/
2; 1
4
55
8250
Ø 35
45
DBD.6K..
D
X F Y
3
X Y
90
90
9
180
103
G1/
2; 1
4
4
2
A
40,571
32,5
8731
35
11
72
4
SW19
SW6
10
AB
94 m
ax
94 m
ax124
208
6; 75
SW30
SW32
Ø 60
Ø 60
1
P
F
D
A/F 6
A/F 19
Control cover with manual pressure adjustment, for electrical unloading
NS 63 Dimensions in mm
LFA..DBW.-7X/...
LFA..DBS.-.../...
Directional poppet valveM-3SED 6 U
Directionalpoppet valve
M-3SEW 6 ../…UC
** Orifice - Ø1) Orifice M6 tapered
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws are includedwithin the control cover scope ofsupply
Directional spool valve WE 6...
A**1) P**1) F**1) D**1)
DBW 1.0 2.0 2.5
DBS 1.8 2.0 2.0
A/F 30A/F 32
LC; LFA 25/68 Rexroth Hydraulics
RE 21 050/02.99
P T
A Ba
P T
A
P T
Aa
F**X
A
Y
P T
A
BX
A**
Y
B**
Ba
B A
P
T
2,5
H2
H1
H3
Ø 38
DBD.10K..
3 9
2
68
2,5
YFX
D2Y
F
X
H4
G1/2; 14
1
SW36SW30SW19SW6
10
4
B A
L8
14
31 11
590 m
ax
90 m
ax120
208
6; 75
Ø 60
Ø 60
X
G1/2; 14
A
F**X
A
Y
P T
A
BX
P**
YX**
a
Control cover with manual pressure adjustment, for electrical unloading
NS 80, 100
Dimensions in mm
4WE 10 D...M-3SED 10 U../350…M-3SEW 10 U../420… M-3SED 10 C../350…
M-3SEW 10 C../420…
3WE 10 B9...
LFA..DBS.-6X/...NS 80, 100
LFA..DBW.-6X/...NS 80, 100
Directional poppet valveM-3SED 10 U
Directional poppet valve
M-3SEW 10 ../…UC
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws areincluded within the controlcover scope of supply
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjsuter type "4"
801.23.03.53.02.525010030455275
1001.53.03.53.02.530010030515285
NSA**1)
B**1)
P**1)
X**2)
F**2)
D2H1H2H3H4L8
** Orifice - Ø1) Orifice M8 x 1 tapered2) Orifice G 1/4 tapered
Wege-Schieberventil WE 10...A/F 6
A/F 19
A/F 30A/F 36
RE 21 050/02.99
Rexroth Hydraulics 26/68 LC; LFA
P T
A Ba
P T
A Ba b
P T
A Ba
P T
A Ba b
F**X
A
Y
Y
B
X**
B**P T
A Ba
F**X
A
Y
Y
B
X**
B**P T
A Ba
X
F**X
A
Y
Y
B
B**P T
A Ba
XD**
F**X
A
Y
Y
B
X**
B**P T
A Ba
X
Control cover with manual pressure adjustment, for isolation functions
1 2 3 4 5 6 9
NS 16 to 100
LFA DBWD
NS 16NS 25NS 32NS 40NS 50NS 63
Series7X
= 16= 25= 32= 40= 50= 63
NS 80NS 100
Series6X
= 80= 100
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings(take max. perm. pressure of pilot valve into account)
Adjuster type
Rotary knob = 1
Hexagon with protective cap = 2Lockable rotary knob with scale = 3(H-lock to automotive industry standards)
Rotary knob with scale not lockable = 4
Series 6X (NS 80 and 100) = 6X
Series 7X (NS 16 to 63) = 7X
3 WE 6 A../...
4 WE 6 M../...
3 WE 6 B9-../...
LFA..DBWD.-7X/...NS 25, 32
LFA..DBWD.-7X/...NS 16
LFA..DBWD.-6X/...NS 80, 100
LFA..DBWD.-7X/...NS 40, 50, 63
4 WE 10 M...
3 WE 6 B9-../... 3 WE 10 A... 3 WE 10 B9...
3 WE 6 B9-../...
LC; LFA 27/68 Rexroth Hydraulics
RE 21 050/02.99
Ø 3
2
3
82
90
1
4252 max
9 43 DBD.2K.4
G 1
/4; 1
2H
2H
1H
3
X F Y
10SW22SW10
10480 max
18
86; 7
1
Ø 4
0
10 5H
4Ø35
L22L1
L3
ABP
TYX
40,5L6L5
32,5
4
G 1/4; 12
L4
31L7
BA
H5
11 A
2
32,5
SW610
4
D1/
T1
H2H
1H
3
Ø 3
5
H4
DBD.6K..
72
D
X F Y
3
XY
L5
L4
L7
L1
L3
1
AP
A
B AP
T
31
L6 40,59
4
H5
B
SW19
SW30
SW32
4
D1/T12
11
5
Ø 6
0
94 max
6; 7124 20
Ø 6
0
94 max
8
Control cover with manual pressure adjustment, for isolation functions
NS 16, 25, 32 Dimensions in mm
Directional spool valve . WE 6...
NS 40, 50
Directional spool valve . WE 6...
For dimension table see page 28
1 Port X optionally asthreaded port
2 Port Y optionally asthreaded port
3 Locating pin
4 Adjuster type "2"5 Adjuster type "1"
6 Adjuster type "3"
7 Adjuster type "4"8 Space required to
remove key
9 Name plate
10 Lock nut11 Valve fixing screws are included within the
control cover scope of supply
A/F 22
A/F 10
A/F 32
A/F 30
A/F 19
A/F 6
RE 21 050/02.99
Rexroth Hydraulics 28/68 LC; LFA
G1/
2; 1
4
B AP
T
4
G1/
2; 1
4
H2H
1H
3
Ø 35
H4
DBD.6K..
D
X F Y
3
X Y
90
90
9
L1
103
1
4
2
A
40,571
32,5
8731
35
72
4; 5…711
AB
BA
P
T
2,5
H2
H1
H3
Ø 38
DBD.10K..
3 9 2
68
2,5
YFX
D2YX
H4
G1/2; 14
1 G1/2; 14SW36SW30SW19SW6
10
4
B
L8
14
41
11
90 m
ax
5
90 m
ax
120
208
6; 7X
Ø 60
Ø 60
Control cover with manual pressure adjustment, for isolation functions
NS 63 Dimensions in mm
** Orifice - Ø1) Orifice M6 tapered (NS 16...63) or M8 x 1 tapered (NS 80 and 100)2) Orifice M6 tapered (NS 16...63) or G 1/4 tapered (NS 80 and 100)
NS 16 25 32 40 50 63 80 100B**1) 1.0 1.0 1.0 1.2 1.5 1.8 3.5 3.5X**2) 0.8 0.8 1.0 3.0 3.0F**2) 1.0 1.0 1.2 1.2 1.5 2.0 2.5 2.5D**1) 1.0 2.0 2.5D1 G 1/4 G 1/2D2 250 300H1 40 40 50 60 68 82 100 100H2 19 26 46 50 55 67 67H3 15 24 28 32 34 50 45 51H4 19 19 26 27 35 45 58 58H5 28 28 37 16 20L1 65 85 100 L1 125 140 180L2 80 85 100L3 49 56.5 62.5 70L4 32.5 45.5 53 76 84L5 35 36 57 68 75L6 7 8 31 43.5 51L7 17 27 34.5 47 54.5L8 75 85T1 12 14
NS 80, 100
Directional spool valve .WE 6...
Directional spool valve .WE 10...
1 Port X optionally asthreaded port
2 Port Y optionally asthreaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws areincluded within the controlcover scope of supply
A/F 6A/F 19A/F 30A/F 36
LC; LFA 29/68 Rexroth Hydraulics
RE 21 050/02.99
P T
A Ba b
P T
A Ba b
P T
A Ba b
F**
X
A
YB
D**P**
P T
A Ba
DB max
DB 1
B
A T
P**YX
F**
X
A
YB
D**P**
P T
A Ba
DB max
DB 1
A
A T
P**YX
F**X
A
Y
Y
B
D**P**
P T
A Ba
XDB max
DB 1
B
B A T
F**X
A
Y
Y
B
D**P**
P T
A Ba
XDB max
DB 1
A
B A T
F**
X
A
Y
Y
B
D**
P**
P T
A Ba
XDB max
DB 1
B
B A T
F**
X
A
Y
Y
B
D**
P**
P T
A Ba
XDB max
DB 1
A
B A T
Control cover with 2 manual pressure adjustments, electrically selectable
1 2 3 4 5 6 7 9NS 16 to 100
DB1DB max.
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings(take max. perm. pressure of pilot valve into account)
6X = Series 6X (NS 80 and 100)7X = Series 7X (NS 16 to 63)
LFA A...NS 16NS 25NS 32NS 40NS 50NS 63
Series7X
= 16= 25= 32= 40= 50= 63
NS 80NS 100
Series6X
= 80= 100
Adjuster type (details only required for DB1)
Rotary knob = 1Hexagon with protective cap = 2Lockable rotary knob with scale = 3(H-lock to automotive industry standards)Rotary knob with scale not lockable = 4
Control cover typeDe-energised - DB1 (4 WE.. D)De-energised - open (4 WE.. H)
De-energised - DB max. (4 WE.. D) = DBU2B(see symbols)
= DBU2A
LFA..DBU2A.-7X...NS 16, 25, 32
LFA...DBU2B.-6X/...NS 80, 100
LFA...DBU2A.-6X/...NS 80, 100
LFA..DBU2B.-7X/...NS 40, 50, 63
LFA..DBU2A.-7X/...NS 40, 50, 63
LFA..DBU2B.-7X/...NS 16, 25, 32
4 WE 10 D../...4 WE 10 H../...
4 WE 6 H../...
4 WE 6 D../...
4 WE 6 H../...
4 WE 6 D../...
4 WE 10 D../...
4 WE 6 D../... 4 WE 6 D../...
RE 21 050/02.99
Rexroth Hydraulics 30/68 LC; LFA
Ø 3
2
3
82
90
1
41
52 max
9
4
3
DBDS2K.
H4
L2
4
G 1
/4 /1
2H
2H
1H
3
D
X F Y
12
SW 22 SW 10
10480 max2
L1L3
18
86; 7
1
Ø 4
0
10 5
L4Ø
35
P
H5
ABP
TY
X
10
40,5L6L5
45
4
A
2 G 1/4 /12
AB
DB1
13
4
DBD.2K. 4, 5…7
20
40
32,5
8811
31
42
L7
11
DB max *)
Control cover with 2 manual pressure adjustments, electrically selectable
NS 16, 25, 32 Dimensions in mm
Directional spool valve 4 WE 6...
** Orifice - Ø1) Orifice M6 tapered
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut11 Valve fixing screws M5 x 90 are included
within the scope of the control cover supply
12 Plug M6 tapered for ..DBU 2A..
13 Plug M6 tapered for ..DBU 2B..
*) For DB max. only adjuster type "2" is possible
NS P**1) X**1) F**1) D**1) H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 2732 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
A/F 22 A/F 10
LC; LFA 31/68 Rexroth Hydraulics
RE 21 050/02.99
32,5
SW610
4
D1/
T1H
2H
1H
3
Ø 3
5
H4
DBDS6K..
72
D
X F Y
3
XY
L5
L4
L7
L1
L3
11
A
P
B
A
B AP
T
31
L6 40,5
9
4
H5
SW19
SW30
SW32
4
D1/T1 2
45
105
11
DBD.6K.. 4, 5…7
1
40
12
13
DB1
DBmax*)20
A
32,5
SW610
4
H2H
1H
3
H4D
X F Y
3
XY
9090
87
L1
103
11
A
P
B
B AP
T31
71 40,5
9
SW19
SW30
SW32
45105
11
DBD.6K..4, 5…7
140
12
13
DB1
20DBm
ax*)
4
G1/2; 14
2G1/2; 14
35
4
Ø 35
5
6; 7
8DBDS6K..
Ø 6
094 max
124 20Ø
60
94 max
72
Control cover with 2 manual pressure adjustments, electrically selectable
NS 40, 50 Dimensions in mmNS 63
8 Space required toremove key
9 Name plate10 Lock nut
11 Valve fixing screws M5 x 90 areincluded within the controlcover scope of supply
12 Plug M6 tapered for ..DBU 2A..
13 Plug M6 tapered for ..DBU 2B..*) For DB max. only adjuster type "2" is possible
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"
6 Adjuster type "3"7 Adjuster type "4"
** Orifice - Ø1) Orifice M6 tapered
Directional spool valve 4 WE 6... Directional spool valve 4 WE 6...
NS P**1) F**1) D**1) D1 H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7 T1
40 1.2 1.2 1.0 G1/4 60 17 32 27 40 125 69 76 68 43.5 47 1250 1.5 1.5 2.0 G1/2 68 19.5 34 35 50 140 80 84 74.5 51 54.5 14
63 2.5 2.0 2.5 82 55 50 45 180
A/F 32
A/F 30
A/F 19
A/F 6
A/F 32
A/F 30
A/F 19
A/F 6
RE 21 050/02.99
Rexroth Hydraulics 32/68 LC; LFA
B AP
T
2,5
H2
H1
H3
DBDS10K..
3
22,5
YFX
D2
Y
F
X
H4
G1/2; 14
1 G1/2; 14
4
A
46
14
31
11
6; 75
90 max
68
90 max
120 20
8
P
70
35
X
14
Ø 3
8
129
13
54
L8
70
*)DBmax
DBD.10K.. 4, 5…7
DB1
Ø 6
0
Ø 6
0
110
SW36
SW30
SW19
SW6
10
A
Control cover with 2 manual pressure adjustments, electrically selectable
NS 80, 100 Dimensions in mm
** Orifice - Ø1) Orifice M8 x1 tapered2) Orifice G 1/4 tapered
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin4 Adjuster type "2"
5 Adjuster type "1"
6 Adjuster type "3"7 Adjuster type "4"
8 Space required toremove key
9 Name plate10 Lock nut
11 Valve fixing screws areincluded within thecontrol cover scope of supply
12 PlugM8 x 1 tapered for ...DBU2A...
13 PlugM8 x 1 tapered for ...DBU2B...
*) For DB max. onlyadjuster type "2" is possible
Directional spool valve 4 WE 10...
NS P**1) X**2) F**2) D2 H1 H2 H3 H4 L8
80 3.5 3.0 2.5 250 100 30 45 52 75100 3.5 3.0 2.5 300 100 30 51 52 85
A/F 6
A/F 19
A/F 30
A/F 36
LC; LFA 33/68 Rexroth Hydraulics
RE 21 050/02.99
P T
A B
a b
P T
A B
a b
P T
A B
a b
P T
A B
a b
P T
A B
a b
P T
A B
a b
F**
X
A
YB
D**P**
P T
A Ba
DB max
DB 1
A T
X**
DB 2
YX
P T
A Ba
DB 1
A T
DB 2
F**X
A
Y
Y
B
D**
P**
XDB max
B
P T
A Ba
DB 1 DB 2
F**
X
A
Y
Y
B
D**
P**
XDB max
B A T
Nom. size 16Nom. size 25Nom. size 32Nom. size 40Nom. size 50Nom. size 63
Nom. size 80Nom. size 100
= 16= 25= 32= 40= 50= 63
= 80= 100
Series 7X
Series 6X
Adjuster type (details only for DB1 or DB2)*)
Rotary knob = 1Hexagon with protective cap = 2Lockable rotary knob with scale = 3(H-lock to automotive industry standards)Rotary knob with scale not lockable = 4
Control cover with 3 manual pressure adjustments, electrically selectable
1 2 3 4 5 6 7 8 9
NS 16 to 100
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25, 32
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings(take max. perm. pressure of pilot valve into account)
LFA DBU3D A... B...
DB2
DB1
DBmax
Series 6X (NS 80 and 100) = 6XSeries 7X (NS 16 to 63) = 7X
*) For DB1 and DB2 select the same adjuster type
4WE 6 H .. /...
4WE 6 E .. /...
4WE 6 D .. /...
4WE 10 H.. /...
4WE 10 E.. /...
4WE 10 D.. /...
LFA..DBU3D.-7X/...NS 16, 25, 32
LFA..DBU3D.-7X/...NS 40, 50, 63
LFA...DBU3D.-6X/...NS 80, 100
4WE 6 H .. /...
4WE 6 E .. /...
4WE 6 D .. /...
RE 21 050/02.99
Rexroth Hydraulics 34/68 LC; LFA
Ø 3
2
3
82
90
1
41
52 max
9
4
3
DBDS2K...
H4
L2
4
G 1
/4 /1
2H
2H
1H
3
D
X F Y
SW 22 SW 10
10480 max
2L1
L3
18
86; 71
Ø 4
0
10 5
L4Ø
35
P
H5
ABP
TY
X
10
40,5L6L5
45
4
A
2 G 1/4 /12
AB
DB1 *)
DB max **)
4
DBD.2K. 4, 5…7
100
32,5
8811
31
42
L7
DBD.2K. 4, 5…7DB2 *)
79
21
11
Control cover with 3 manual pressure adjustments, electrically selectable
NS 16, 25, 32 Dimensions in mm
** Orifice - Ø1) Orifice M6 tapered
Directional spool valve 4 WE 6...
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"5 Adjuster type "1"
6 Adjuster type "3"
7 Adjuster type "4"8 Space required to
remove key
9 Name plate
10 Lock nut11 Valve fixing screws are included
within the control cover scope ofsupply
*) for DB1 and DB2select the same adjuster type
**) For DB max. only adjuster type"2" is possible
NS P**1) X**1) F**1) D**1) H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L716 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 27
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
A/F 22 A/F 10
LC; LFA 35/68 Rexroth Hydraulics
RE 21 050/02.99
4
D1/
T1
H2
H1
H3
Ø 3
5
H4
DBDS6K..
72
D
X F Y
3
11
A
P
B
A
4
H5
DBD.6K.. 4; 5…7
1
110
DB2 *)
DBmax**)
DB1 *)
21
89
32,5
SW610
XY
L5
L4
L7
L1
L3
B AP
T
31
L6 40,59
SW19
SW30
SW32
4 D1/T1 2
45
105
11
6; 75
94 max
94 max
124 20
8
Ø 6
0
Ø 6
0
Control cover with 3 manual pressure adjustments, electrically selectable
NS 40, 50 Dimensions in mm
Directional spool valve 4 WE 6...1 Port X optionally
as threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws are includedwithin the control cover scopesupply
*) For DB1 and DB2select the same adjuster type
**) For DB max. only adjustertype "2" is possible
** Orifice - Ø1) Orifice M6 tapered
NS P**1) F**1) D**1) D1 H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7 T1
40 1.2 1.2 1.0 G1/4 60 17 32 27 40 125 69 76 68 43.5 47 12
50 1.5 1.5 2.0 G1/2 68 19.5 34 35 50 140 80 84 74.5 51 54.5 14
A/F 32
A/F 30A/F 19
A/F 6
RE 21 050/02.99
Rexroth Hydraulics 36/68 LC; LFA
32,5
SW610
4
G 1
/2; 1
455
8250
Ø 3
5
45,
72
D
X F Y
3
XY
90
90
87
180
103
11
A
P
B
A
B AP
T
31
71 40,5
SW19
SW30
SW32
45
105
11
DBD.6K.. 4; 5…7
1
110
DB2 *)
94 max
94 max
124 20
DB1 *)
21
89
DBm
ax**
)
G1/
2; 1
4
4
2
DBD.6K.. 4; 5…7
DBDS6K.. 4
35
9
6; 75 8
Ø 6
0
Ø 6
0
Control cover with 3 manual pressure adjustments, electrically selectable
NS 63 Dimensions in mm
Directional spool valve 4 WE 6...
** Orifice - Ø1) Orifice M6 tapered
NS
P**1)
F**1)
D**1)
63
2.52.0
2.5
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"6 Adjuster type "3"
7 Adjuster type "4"
8 Space required toremove key
9 Name plate
10 Lock nut
11 Valve fixing screws are includedwithin the control cover scope ofsupply
*) For DB1 and DB2select the same adjuster type
**) For DB max. only adjustertype "2" is possible
A/F 32
A/F 30
A/F 19
A/F 6
LC; LFA 37/68 Rexroth Hydraulics
RE 21 050/02.99
B AP
T
2,5
H2
H1
H3
DBDS10K..
3 2
2,5
YFX
D2
Y
F
X
H4
G1/2; 141 G1/2; 14
4
B A
46
14
31
1190 max
68
90 max
120 20
P
150
35
X
14
Ø 3
8
54
L8
70
DBmax **)
DBD.10K.. 4, 5…7
115
9
DB2 *)
DB1 *)
SW6
SW19
SW30SW36
110
10
5
Ø 6
0
6; 7 8
Ø 6
0
Control cover with 3 manual pressure adjustments, electrically selectable
NS 80, 100 Dimensions in mm
** Orifice - Ø1) Orifice M8 x1 tapered2) Orifice G 1/4 tapered
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"
5 Adjuster type "1"
6 Adjuster type "3"7 Adjuster type "4"
8 Space required toremove key
9 Name plate10 Lock nut
11 Valve fixing screws areincluded within the controlcover scope of supply
*) For DB1 and DB2select the same adjuster type
**) For DB max. only adjustertype "2" is possible
Directional spool valve 4 WE 10...
NS P**1) X**2) F**2) D2 H1 H2 H3 H4 L880 3.5 3.0 2.5 250 100 30 45 52 75
100 3.5 3.0 2.5 300 100 30 51 52 85
A/F 6
A/F 19
A/F 30A/F 36
RE 21 050/02.99
Rexroth Hydraulics 38/68 LC; LFA
–
32,5
4
D1/
T1
H2
H1
H3 D
1/T1 H
4
D
XF
Y
3
XY
L4
L6
9
L1
L3
1
P
B AP
T
31
L5 40,5 NG 40, 50, 63
4
11 14
9NG 16, 25, 32L2
2
2
X
A
YB
D**P**
X**YX
14
X
A
YB
D** P**
X**YX
14
X
A
YB
D**
B**
F**YX
P**
14
D1/
T1
H2
H1
H3 D1/
T1
H4
D
X F Y
1
B
P
50
146
L5
39,515
Control cover for electrical-proportional pressure adjustment, without maximum pressure limitation
1 2 3 5 9NS 16 to 63
LFA DBE 7XNS 16NS 25NS 32
= 16= 25= 32
NS 40NS 50NS 63
= 40= 50= 63
No code = NBR sealsV = FKM seals
(other seals on request) Attention!
The compatibility of the seals and pressurefluid has to be taken into account!
Series 7X (NS 16 to 63) = 7X
For mounting a proportional pressure relief valvewithout electrical feedback = DBE
LFA...DBE-7X/ NG 50, 63LFA...DBE-7X/ NG 25, 32, 40LFA...DBE-7X/ NG 16
NS 16 to 40 NS 50, 63
zeropressure
** Orifice - Ø1) Orifice M6 tapered2) Orifice M6 tapered (NS16), M8 x 1 tapered (NS25 ... 63)
NS 16 25 32 40 50 63B**1) 0.8 0.8P**1) 1.0 1.0 1.0 1.5 1.0 1.0X**1) 0.8F**1) 0.8 1.0 1.2 1.5 2.0D**2) 0.8 0.8 0.8 1.0 2.0 2.5D1 G1/4 G1/4 G1/4 G1/2 G1/2 G1/2H1 40 40 50 60 68 82H2 17 19 26 30 32 30H3 15 24 28 32 34 50H4 20 19 26 30 32 40L1 65 85 100 125 140 180L2 80 85 100 125 140 180L3 36.5 49 56,5 72 80 100L4 23.5 36 43.5 53 50 80L5 7 23.5 31 43.5 51 71L6 17 27 34.5 47 54.5 74.5T1 12 12 12 14 14 14
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
9 Name plate
11 Valve fixing screws areincluded within the controlcover scope of supply
14 Prop. pressure reliefvalve type DBET-5X/...(see summary on page 14,and catalogue sheet RE 29 165)
15 Pressure relief valveNS 6 (is included within thescope of supply)
notNS 16
only NS 16
Dimensions in mm
NS 16, 25, 32
NS 40, 50, 63
LC; LFA 39/68 Rexroth Hydraulics
RE 21 050/02.99
X
A
YB
D**P**
X**YX
14
F**
P T
14
X
A
YB
D**P**
YXF**
P T
P**14
X
A
YB
X**YX
F**
P TB**
T TAP
D**B**
B**
14
X
A
YB
D**YX
F**
P T
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
NS 16 to 100
Nom. size 16Nom. size 25Nom. size 32Nom. size 40Nom. size 50Nom. size 63Nom. size 80Nom. size 100
= 16= 25= 32= 40= 50= 63
= 80= 100
Series 7X
Series 6X
1 2 3 5 6 9
No code = NBR sealsV = FKM seals
(other seals on request)
Attention!The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25, 32
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar050 = 50 bar100 = 100 bar200 = 200 bar315 = 315 bar400 = 400 bar
Pressure ratings(take max. perm. pressure of pilot valve into account)
LFA DBEM
Series 6X (NS 80 to 100) = 6XSeries 7X (NS 16 to 63) = 7X
For mounting a proportional pressure relief valveWithout electrical feedback andWith maximum pressure safety = DBEM
LFA..DBEM-7X/...NS 50, 63
LFA..DBEM-7X/...NS 40
LFA..DBEM-7X/...NS 16, 25, 32
LFA..DBEM-6X/...NS 80, 100
zeropressure
zeropressure
For item nos. see page 40
RE 21 050/02.99
Rexroth Hydraulics 40/68 LC; LFA
32,5
4
G1/
4; 1
2
H2
H1
H3
H4
D
XF
Y
3
XY
L4
L6
L1
L3
1
P
B AP
T
31
L5 40,5
11 14
9
L2
42Ø
35
L7 2G1/4; 12
H5
DBDS2K.. 4
SW10
SW22 10
2NS 16, 25, 32 Dimensions in mm
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
** Orifice - Ø1) Orifice M6 typered
Ports T and Y - zero pressure1 Port X optionally
as threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"9 Name plate
10 Lock nut
11 Valve fixing screws are includedwithin the control cover scopeof supply
14 Proportional pressure relief valvetype DBET-5X/…–13)
(see summary on page 14, alsocatalogue sheet RE 29 165)
3) 1 = G 1/4 threaded port T,special poppet
NS P**1) X**1) F**1) D**1) H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 7 17 35
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 8 27 36
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 31 34.5 57
A/F 22
A/F 10
LC; LFA 41/68 Rexroth Hydraulics
RE 21 050/02.99
32,5
4
G1/
4; 1
2
H2
H1
H3
H4
D
XF
Y
3
XY
L4
L6
L1
L3
1
P
B AP
T
31
L5 40,5
11 14
H5
L7
4
Ø 3
5
72
DBDS6K..4
9
SW6
SW19
SW30
SW32
10
G1/4; 12 2
4
G1/
2; 1
4
H2
H1
H3
H4
D
XF
Y
1 5
0
146
51
39,5
H5
72
DBDS6K.. 43
G1/2; 14 2
15
NS 40 Dimensions in mm
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitaion
NS 50
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjustment type "2"
9 Name plate10 Lock nut
11 Valve fixing screws are includedwithin the control cover scope ofsupply
14 Proportional pressure relief valvetype DBET-5X/…G24 (NS 40)type DBET-5X/…Y G24-13) (NS 50)(see summary on page 14, andcatalogue sheet RE 29 165)
15 Pressure relief valve NS 6(is included within the scope ofsupply)
3) 1 = G 1/4 threaded port T,special poppet
** Orifice - Ø1) Orifice M6 tapered
NS B**1) P**1) F**1) D**1) H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7
40 1.5 1.2 1.0 60 20 32 27 40 125 69 76 43.5 47 68
50 0.8 1.5 2.0 68 19.5 34 35 50 140 80 84 51 54.5 74.5
A/F 30 A/F 6
A/F 32A/F 19
RE 21 050/02.99
Rexroth Hydraulics 42/68 LC; LFA
2,5
H2
H1
H3
40,5
DBDS10K..3 9 2
2,5
YFX
D2 YX
H4
G1/2; 141 G1/2; 14 4
B
46
1431
15
X
PD
TA
B
P
70
54 35
L8
806
3116
,5
14
95,5
115 3514
32,5
4
G 1
/2; 1
4
H2H
1H
3
H4D
X F Y
3
XY
90
90
87
L1
103
11
B AP
T
71 40,5
1
4
DBDS6K..4
35
G1/2; 14 2
9
50
72
15 SW6
SW19
SW30
SW32
10
71146
39,5 Ø 35
31
NS 63 Dimensions in mm
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
NS 80, 100
** Orifice - Ø1) Orifice M6 tapered (NS63) orifice M8 x 1 tapered (NS80, 100)2) Orifice M6 tapered (NS63) orifice G 1/4 tapered (NS80, 100)
1 Port X optionallyas threaded port
2 Port Y optionallyas threaded port
3 Locating pin
4 Adjuster type "2"9 Name plate
10 Lock nut
11 Valve fixing screws areincluded within the controlcover scope of supply
14 Proportional pressure relief valvetype DBET-5X/…Y G24-13)
(see summary on page 14, andcatalogue sheet RE 29 165)
15 Pressure relief valve NS 6(is included within the scope of supply)
3) 1 = G 1/4 threaded port T,special poppet
NS B**1) P**1) X**2) F**2) D**1) H1 H2 H3 H4 D2 L1 L863 0.8 2.0 2.5 82 55 50 45 180
80 0.8 1.0 3.0 2.5 100 30 45 52 250 75
100 0.8 1.0 3.5 3.0 100 30 51 52 300 85
A/F 6
A/F 19
A/F 30
A/F 32
LC; LFA 43/68 Rexroth Hydraulics
RE 21 050/02.99
B
A
B
A
X YX** F**
Pressure reducing function
Ordering details: pressure reducing cartridge valve (without associated control cover LFA..DB..)
No code = NBR sealsV = FPM seals
(other seals on request) Attention!
The compatibility of the seals and pressurefluid has to be taken into account!
7X = (NS 16 to 63) Series 70 to 79(70 to 79: unchanged installation and connection dimensions)
E = Spool without fine control grooves
Nominal size 16 = 16Nominal size 25 = 25Nominal size 32 = 32Nominal size 40 = 40Nominal size 50 = 50Nominal size 63 = 63
Closing pressure approx. 0 bar (without spring) = 00Closing pressure approx. 2 bar = 20Closing pressure approx. 3 bar = 30 1)
Closing pressure approx. 4 bar (standard spring) = 40Closing pressure approx. 5 bar = 50 2)
Closing pressure approx. 8 bar = 80 3)
LC DR E 7X
Preferred types and standard components arehighlighted in the RPS (Rexroth Price list Standard).
1) Closing pressure 3.0 bar only for NS16 for mounting a pilotoperated pressure relief valve type DBC . -5X/…SO187 (seecatalogue sheet RE 25 802)
2) Only for NS 16, 25 and 323) Special installation room required (see page 47)
Symbol: cartridge valves
Pressure fluid mineral oil (HL, HLP) to DIN 51 524 1);fast bio-degradable pressure fluids toVDMA 24 568 (see also RE 90 221); HETG (rape seed oil) 1);HEPG (polyglycole) 2); HEES (synthetic ester) 2);other pressure fluids on request
Pressure fluid temperature range °C – 30 to + 80 for NBR seals
– 20 bis + 80 for FKM seals
Viscosity range mm2/s 2.8 to 380
Degree of contamination maximum permissible degree of contamination of the pressurefluid is to NAS 1638 class 9. We, therefore recommend a filterwith a minimum retention rate of ß10 ≥ 75.
Max. operating pressure – Ports A and B bar 315
Max. flow (recommeded) NS 16 NS 25 NS 32 NS 40 NS 50 NS 63
– LC..DR20.../.. L/min 100 200 300 750 1000 1600
– LC..DR40.../.. L/min 150 300 450 1000 1300 2000
Technical data (for applications outside these parameters, please consult us!)
1) suitable for NBR and FKM seals2) only suitable FKM seals
Preferably use 5 and 8 bar springs for flow control. The usable ∆p is available on request.
Pressure reducing functionNormally open
Attention!2-way cartridge valves LC..DR... are combinedwith control covers type LFA..DB... (for orderingdetails see page 13).
Type LC..DR..
e.g.Type LFA...DB...
Type LC..DR 40...
RE 21 050/02.99
Rexroth Hydraulics 44/68 LC; LFA
25 1750 50 75 100 125 150
5
10
158 bar
4 bar
2 bar
25 175
50
300
0
100
150
200
250
50 75 100 125 150
50 300
50
300
0 100 150 200 250
100
150
200
250
25 175
1,25
0
0,25
0,5
0,75
1,0
50 75 100 125 150
8 bar
4 bar
2 bar
50
300
0
100
150
200
250
100 200 300 400
50 300
50
300
0 100 150 200 250
100
150
200
250
0 100 200 300 400
5
10
158 bar
4 bar
2 bar
1,6
0
0,4
0,8
1,2
100 200 300 400
1,4
0,2
0,6
1,08 bar
4 bar
2 bar
Characteristic curves (measured at ν = 41 mm2/s and ϑ = 50 °C)
LC 16 DR...
LC 25 DR...
Out
let p
ress
ure
in b
ar →
Flow in L/min → Flow in L/min →
Out
let p
ress
ure
in b
ar →
Pres
sure
diff
eren
tial i
n ba
r →Lo
wes
t set
tabl
e pr
essu
re in
bar
Inlet pressure in bar → Flow in L/min →
Pilo
t oil
flow
in L
/min
→
Out
let p
ress
ure
in b
ar →
Flow in L/min → Flow in L/min →
Out
let p
ress
ure
in b
ar →
Pres
sure
diff
eren
tial i
n ba
r →Lo
wes
t set
tabl
e pr
essu
re in
bar
Inlet pressure in bar → Flow in L/min →
Pilo
t oil
flow
in L
/min
→
Measured at: pa = 50 bar
Measured at: pa = 50 bar
LC; LFA 45/68 Rexroth Hydraulics
RE 21 050/02.99
600
50
300
0
100
150
200
250
100 200 300 400 500
50 300
50
300
0 100 150 200 250
100
150
200
250
15
0
5
10
600100 200 300 400 500
8 bar
4 bar
2 bar
1,6
0
0,4