ti_vas_gb

Solenoid valves for gas VAS A further development of the solenoid valves for gas VG and VS

Suitable for a max. inlet pressure of 500 mbar Easy installation into a system Compact design saves space Easy ow adjustment with display Check indication by blue LED Position indicator with integral visual indicator Suitable for intermittent operation Wide-ranging applications due to the modular con-struction

Higher ow rates with the same nominal size

3.1.0.2 Technical Information Edition 09.04 GB

2VAS Edition 9.04 = To be continued

Table of contentsSolenoid valves for gas VAS . . . . . . . . . . . . . . . . .1Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . 2Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Application examples . . . . . . . . . . . . . . . . . . . . . . . .4Solenoid valve for gas . . . . . . . . . . . . . . . . . . . . . . . . . .4Double disc solenoid valve . . . . . . . . . . . . . . . . . . . . . . .4Gas solenoid valve with inlet and outlet pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . .5Gas solenoid valve with two outlet pressure switches . .5Gas solenoid valve with pilot gas valve . . . . . . . . . . . . . .6Gas solenoid valve with pilot gas valve and pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Gas solenoid valve with bypass valve. . . . . . . . . . . . . . . 7

Certication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9VAS..N, quick opening . . . . . . . . . . . . . . . . . . . . . . 9VAS..L, slow opening . . . . . . . . . . . . . . . . . . . . . . 10VAS..S, position indicator and visual indicator . . . .11VAS connection diagram . . . . . . . . . . . . . . . . . . . .12

Replacement possibility for solenoid valves for gas with threaded connection . . . . . . . . . . 13VG is to be replaced by VAS . . . . . . . . . . . . . . . . 13

Replacement possibility for MODULINE solenoid valves for gas . . . . . . . . . . . . . . . . . . . 15VS is to be replaced by VAS. . . . . . . . . . . . . . . . . .15

Flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17kv value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Project planning information . . . . . . . . . . . . . . .21Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Pressure switch for gas DG..C. . . . . . . . . . . . . . . .22Bypass valve VAS 1 . . . . . . . . . . . . . . . . . . . . . . . .22

Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . 23Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Maintenance cycles . . . . . . . . . . . . . . . . . . . . . . 25Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3VAS Edition 9.04

VAS../L VAS..S VAS../N + DG..CVAS../N

ApplicationSolenoid valves for gas VAS for safeguarding and con-trolling the air and gas supply to gas burners and gas appliances. For use in gas control and safety systems in all sectors of the iron, steel, glass and ceramics indus-tries, also in commercial heat generation, such as the packaging, paper and foodstuffs industries.

The modular design principle allows the individual components of the VAS Series to be easily assembled:e.g. quick opening,slow opening,with position indicator and visual indicator,quick opening with attached pressure switch.

4VAS Edition 9.04

VAS..N

VAS..N VAS..L

Application examplesSolenoid valve for gasVAS..N, quick opening

Double disc solenoid valveVAS..N, quick opening VAS..L, slow opening

Application

5VAS Edition 9.04

VAS..N

DG..CDG..C

VAS..N

DG..C

Gas solenoid valve with inlet and outlet pressure switchVAS..N, quick opening,pressure switches DG..C for inlet pressure pe and out-let pressure pa

Gas solenoid valve with two outlet pressure switchesVAS..N, quick opening, pressure switches DG..C for outlet pressure 2 x pa

ApplicationApplication examples

6VAS Edition 9.04

VAS 1

VAS..N

VAS 1 DG..C

VAS..N

Gas solenoid valve with pilot gas valveVAS..N, quick opening,VAS 1 as pilot gas valve

Gas solenoid valve with pilot gas valve and pres-sure switchVAS..N, quick opening, VAS 1 as pilot gas valve, pressure switch DG..C


7VAS Edition 9.04

VAS 1

VAS..N

Gas solenoid valve with bypass valveVAS..N, quick opening,VAS 1 as bypass valve


8VAS Edition 9.04

CerticationEC type-tested and certied pursuant to Gas Appliances Directive (90/396/EEC) in conjunc-

tion with EN 161, Machinery Directive (89/392/EEC), Low Voltage Directive (73/23/EEC) in conjunction

with the relevant standards, EMC Directive (89/336/EEC) in conjunction with EN

55014.FM, UL and CSA approval in preparation.

9VAS Edition 9.04

FunctionThe gas solenoid valve is closed when it is disconnected from the power supply.Opening: Alternating voltage is applied and fed to the solenoid coil via a rectier with a suppressor circuit. The blue LED lights up. The coils magnetic eld pulls the armature with the attached valve disc upwards. The solenoid valve VAS opens. The force distribution of the supply pressure on the two valve seats is almost com-pensated for by having the double valve seat.Closing: The VAS is disconnected from the voltage sup-ply. The blue LED goes out. The armature is pressed into its initial position by the closing spring. The valve closes within 1 s.The strainer in the inlet of the valve prevents deposits of dirt particles on the seat. The pressure loss through the strainer is almost zero.The ow rate can be varied by a ow adjusting screw within a range from 20 to 100%. The setting can be monitored on an indicator.

VAS..N, quick openingThe solenoid valve for gas VAS..N opens within 0.5 s.

10VAS Edition 9.04

t

p a

t

p ap S

Function

VAS..L, slow openingThe solenoid valve for gas VAS..L opens within 10 s.Start gas rate adjustment: A start gas rate can be set on the valve. This means that the valve opens with a quick initial lift and then continues slowly until it is fully open. This setting is required, for example if a tight-ness check is to be conducted with TC. By turning the damper housing the start gas rate can be set between 0 and 70%. Turning it clockwise will increase the start gas rate and turning it anti-clockwise will reduce the start gas rate.

Start gas

fully damped

11VAS Edition 9.04

3

1

2

NC

COM

NO

VAS..S, position indicator and visual indica-torThese devices are tted with a microswitch to supply open and closed signals.Opening: When the valve is opened the position indicator is operated rst. This in turn activates the visual position indicator. The open signal is marked in blue. Only then does the double valve seat open to release the volume of gas (overtravel principle).Closing: The voltage supply is disconnected from the solenoid and the closing spring presses the double valve disc on to the valve seat. The position indicator is then actuated and the visual position indicator jumps to shut.The actuator cannot be rotated on a gas solenoid valve with a position indicator and a visual position indicator.

Function

12VAS Edition 9.04

L1 (+)

N ()

VAS connection diagram

Function

13VAS Edition 9.04

Replacement possibility for solenoid valves for gas with threaded connectionVG is to be replaced by VAS

VG Solenoid valve for gas Solenoid valve for gas VAS10/15 DN 10 internal 15 mm Size 1 DN 10 110

15 DN 15 Size 1 DN 15 11515/12 DN 15 internal 12 mm

20 DN 20 Size 1 DN 20 12025 DN 25 Size 1 DN 25 125

25/15 DN 25 internal 15 mm 40/32 DN 40 internal 32 mm Size 2 DN 40 240


50 DN 50 Size 3 DN 50 35050/39 DN 50 internal 39 mm 50/65 DN 50 internal 65 mm Size 3 DN 50 350


R Rp internal thread Rp internal thread R02 Max. inlet pressure pe max.: 200 mbar Max. inlet pressure pe max.: 500 mbar 03 360 mbar 500 mbar 10 1000 mbar 18 1800 mbar

14VAS Edition 9.04

Replacement possibility for solenoid valves for gas with threaded connection

Cont.N Quick opening Quick opening /NL Slow opening Slow opening /LK Mains voltage: 24 V DC Mains voltage: 24 V DC KQ 120 V AC 120 V AC QT 220/240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket1 Screw plug at the inlet Screw plug at the inlet and outlet 3 Screw plug at the inlet and outlet Screw plug at the inlet and outlet 4 Pressure test point at the inlet Pressure test point at the inlet and outlet* 6 Pressure test point at the inlet and outlet Pressure test point at the inlet and outlet* D Flow adjustment Flow adjustment

S Position indicator Position indicator at the right-hand side SRPosition indicator at the left-hand side SL

G Position indicator with gold contacts

Position indicator with gold contacts at the right-hand side

GR

Position indicator with gold contacts at the left-hand side

GL

M Suitable for biologically produced methane Suitable for biologically produced methane V Viton valve disc seal

VG 25R02NT31DM Example Example VAS 125R/NW

standard, available* Pressure test points may be attached at the left and/or right-hand side.

15VAS Edition 9.04

Replacement possibility for MODULINE solenoid valves for gasVS is to be replaced by VAS

VS Solenoid valve for gas Solenoid valve for gas VAS

115125

3/8 Size 1, DN 15 or 25, Rp 3/8 Size 1 DN 10 110 Size 1, DN 15 or 25, Rp Size 1 DN 15 115 Size 1, DN 15 or 25, Rp Size 1 DN 20 1201 Size 1, DN 15 or 25, Rp 1 Size 1 DN 25 125

230 1 Size 2, DN 32 or 40, Rp 1 Size 2 DN 25 225240 1 Size 2, DN 32 or 40, Rp 1 Size 2 DN 40 240

350 1 Size 3, DN 50, Rp 1 Size 3 DN 40 3402 Size 3, DN 50, Rp 2 Size 3 DN 50 350ML MODULINE + connection anges

Rp internal threadRp internal thread R

02 Max. inlet pressure pe max. 200 mbar Max. inlet pressure pe max. 500 mbar N Quick opening Quick opening /NL Slow opening Slow opening /LD Flow adjustment Flow adjustment

16VAS Edition 9.04

Replacement possibility for MODULINE solenoid valves for gas

Cont.K Mains voltage: 24 V DC Mains voltage: 24 V DC KQ 120 V AC 120 V AC QT 220/240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket Pressure test point at the inlet Pressure test point at the inlet and outlet*

S Position indicator Position indicator at the right-hand side SRPosition indicator at the left-hand side SL

G Position indicator with gold contacts

Position indicator with gold contacts at the right-hand side

GR

Position indicator with gold contacts at the left-hand side

GL

M Suitable for biologically produced methane Suitable for biologically produced methane V Viton valve disc seal

VS 240ML02LT3 Example Example VAS 240R/LWwith Rp 1 connection anges with test points

standard, available* Pressure test points may be attached at the left and/or right-hand side.

17VAS Edition 9.04

1

2

3

4

5

6

8

6 7 8 10 20 30 40 50 60 80 100 200 300 400 5001

600

10

20

30

40

50

60

80

100

p [m

bar]

VAS

110

VAS

115

VAS

120

VAS

125

VAS

340

VAS

350

VAS

365

VAS

232

VAS

225

5 6 7 8 10 20 30 40 50 60 80 100 200 300 4003

4 5 6 7 8 10 20 30 40 50 60 80 100 200 3002

500

400

V' [m3/h (n)]

VAS

240,

VAS

250

Flow rateThe characteristic ow rate curves have been measured with the speci-ed anges and a tted strainer. If two or more valves are combined the pressure loss per individual valve drops by approx. 5%.

= Natural gas = LPG = Air

18VAS Edition 9.04

kv valueThe size and nominal ange width is determined using the ow rate diagram or by calculation using the kv value.

V(n) = 514 kv p pan T

kv = n Tp pa

p = n T

pa V(n)

514 kv

2

V(n) 514

V(n) = Flow rate (standard state) [m/h]kv = Valve coefcient (see table)p = Pressure loss [bar]pa = Outlet pressure (absolute) [bar]n = Density [kg/m] (air 1.29, natural gas 0.83, propane 2.01, butane 2.71 kg/m)T = Medium temperature (absolute) [K]

ExampleWe want to nd the size and nominal ange width for a gas solenoid valve VAS.We have the maximum ow rate V(n) max, the inlet pres-sure pe and the natural gas temperature T.

V(n) max = 60 m3/hpe = 70 mbar = 0,07 bar pe absolute = 0,07 bar + 1 bar = 1,07 barpmax = 0,01 bar (desired) pa absolute = pe absolute pmax pa absolute = 1,07 bar 0,01 bar = 1,06 barT = 27 C Tabsolute = 27 + 273 K = 300 K

kv = = 17,90,83 3000,01 1,06

60514

The gas solenoid valve is selected using the next higher kv value (see table): VAS 225.

Flow rate

Type kV m3/h

VAS 110 5.5VAS 115 6.9VAS 120 10.6VAS 125 12.4VAS 225 22VAS 232 27VAS 240 30VAS 250 30VAS 340 40VAS 350 47VAS 365 51

19VAS Edition 9.04

Selection -0 10 15 20 25 32 40 50 65 / /0 /10 /15 /20 /25 /32 /40 /50 /65 R /N /L K Q W SR GR SL GL

VAS 1 VAS 2 VAS 3 Inlet ange nominal size = no inlet ange-0 = dummy angeOutlet ange nominal size = no outlet ange /0 = dummy angeSpecication may be omitted if outlet = inletRp internal thread = RQuick opening, quick closing = /NSlow opening, quick closing = /LMains voltage: 24 V DC = K 120 V AC; 50/60 Hz = Q 230 V AC; 50/60 Hz = WPosition indicator and visual indicator: attached at the right-hand side = SR* with gold contacts, attached at the right-hand side = GR* attached at the left-hand side = SL* with gold contacts, attached at the left-hand side = GL*

20VAS Edition 9.04

Selection

VAS 1 VAS 2 VAS 3 Electrical connection:M20 cable glandPlug with socketPlug without socketAttached to the left side of the connection box:Not ttedPlug for valvePlug for position indicatorAttached to the right side of the connection box:Not ttedPlug for valvePlug for position indicatorAccessories attached at the right-hand side:2 screw plugs2 test points pe and paPressure switch for gas DG..C (see table) at the inletPressure switch for gas DG..C (see table) at the outletBypass valve VAS 1*Accessories attached at the left-hand side:2 screw plugs2 test points pe and paPressure switch for gas DG..C (see table) at the inletPressure switch for gas DG..C (see table) at the outletBypass valve VAS 1*

* Position indicator and bypass valve cannot be installed together on one side.

Order exampleVAS 232R/NW Electrical connection via M20 cable gland, not tted, with 2 screw plugs attached at the right-hand side and 2 test points attached at the left-hand side

= standard = available

21VAS Edition 9.04

Pressure switch for gas DG..CType Adjusting range [mbar]DG 17/VC 2 17DG 40/VC 5 40DG 110/VC 30 110DG 300/VC 100 300

Selection

22VAS Edition 9.04

pa

pe

aa

GFKVAS

> +80 C> 20mm

Project planning informa-tionThe inlet pressure pe and the outlet pressure pa can be measured at the pressure test points at both ends.

Sealing material and thread cuttings must not be allowed to get into the valve housing.We recommend that a lter be in-stalled upstream of every system.

The solenoid body heats up during operation up to 90C depending on ambient temperature and voltage.

InstallationInstallation position vertical or hori-zontal, not upside down.

The VAS may not be in contact with masonry. Minimum clearance 20 mm.Do not store or install the unit in the open air.

Ensure that there is sufcient installa-tion space around the ange screws and the actuator.

If more than three valVario controls are installed in line, the controls must be supported.

23VAS Edition 9.04

pe pa

AccessoriesPressure switch for gas DG..CScope of delivery: 1 x pressure switch for gas, 2 x retaining screws, 2 x sealing rings.

Monitor the inlet pressure pe: The plug of the pressure switch for gas DG..C points towards the inlet ange.Monitor the outlet pressure pa: The plug of the pres-sure switch for gas DG..C points towards the outlet ange.

24VAS Edition 9.04

1

3

2 4

5

1 2

3

4

5

Auswahl

Bypass valve VAS 1Delivery for VAS 1 attached to VAS 1: 1 1 x bypass valve VAS 1 / 2 1 x connection pipe, 1 x sealing stopper, if the by-pass valve at the outlet side has a threaded ange, or 2 x connection pipes, if the bypass valve has a dummy ange at the outlet side / 3 4 x O-rings / 4 4 x double nuts / 5 4 x connection parts.

Delivery for VAS 1 attached to VAS 2, VAS 3:1 1 x bypass valve VAS 1 /2 1 x connection pipe, 1 x sealing stopper, if the by-pass valve at the outlet side has a threaded ange, or 2 x connection pipes, if the bypass valve has a dummy ange at the outlet side /3 4 x O-rings / 4 4 x washer / 5 4 x connection parts.

25VAS Edition 9.04

Technical dataTypes of gas: Natural gas, LPG (gaseous), biologically produced methane (max. 0.1 %-by-vol. H2S) or air; other gases on request.The gas must be dry in all temperature conditions and must not condense.Max. inlet pressure pe:max. 500 mbar.Flow adjustment limits the maximum ow volume be-tween 20 and 100%. The setting can be monitored on an indicator.Adjustment of the start gas rate:0 to 70%.Opening times: VAS../N quick opening: 0.5 s; VAS../L slow opening: approx. 10 s.Closing time: Quick closing: < 1 s.Ambient temperature: -20 60C, no condensation permitted.Class A safety valve pursuant to EN 161.Mains voltage: 230 V AC, +10/-15%, 50/60 Hz; 120 V AC, +10/-15%, 50/60 Hz; 24 V DC, 20%.Cable gland: M 20 x 1.5.

Power consumption: Type 24 V DC 120 V AC 230 V AC

[W] [W] [W]VAS 1 29 30 30VAS 2 46 54 53VAS 3 53 55 63

Enclosure: IP 65.Duty cycle: 100%.Power factor of the solenoid coil: cos = 1.Valve housing: Aluminium, Valve seal: NBR.Connection anges with internal thread: Rp to ISO 7-1.Position indicator: Contact rating: 125 250 V, 50/60 Hz, max. 2 A (re-sistive load).Switching frequency:VAS..N: Arbitrary.VAS..L: There must be a period of 20 seconds between switching off and on again so that the damping is fully effective.Short circuit-proof: with quick-acting fuse up to 6.3 A.For 24 V DC order a position indicator with gold-plat-ed contacts.Contact rating at 24 V DC: max. 40 mA.

26VAS Edition 9.04

VAS..N VAS..L VAS..N..S VAS..L..S

H1

H2

E

LF

F

H3

H2

E

LF

F

H4

H2

E

LF

F

H5

H2

E

LF

F

21,579

48

36

DG..C

DimensionsType Connection Dimensions V

.

p = 1 mbarWeight

L E F H1 H2 H3 H4 H5 Air kvRp DN mm mm mm mm mm mm mm mm m3/h m3/h kg

VAS 110 3/8 10 75 75 15 140 32 204 154 217 4.4 5.5 1.4VAS 115 1/2 15 75 75 15 140 32 204 154 217 5.5 6.9 1.4VAS 120 3/4 20 91 75 23 140 32 204 154 217 8.5 10.6 1.5VAS 125 1 25 91 75 23 140 32 204 154 217 10.6 12.4 1.4VAS 225 1 25 127 88 29 164 47 228 183 245 17,5 22 3.8VAS 232 11/4 32 127 88 29 164 47 228 183 245 21,5 27 3.7VAS 240 11/2 40 127 88 29 164 47 228 183 245 23,5 30 3.8VAS 250 2 50 127 88 29 164 47 228 183 245 24,6 30 3.6VAS 340 11/2 40 155 88 36 174 59 238 193 256 33 40 5.1VAS 350 2 50 155 88 36 174 59 238 193 256 41 47 4.9VAS 365 21/2 65 155 88 36 174 59 238 193 256 43 51 4.7

Technical data

27VAS Edition 9.04

Maintenance cyclesOnce per year, twice per year in the case of biologically produced methane.If the ow rate drops, clean the strainer.

28VAS Edition 9.04

ContactG. Kromschrder AG Strotheweg 1 D-49504 Lotte (Bren)Tel.: +49 (0)5 41 / 12 14 - 0 Fax: +49 (0)5 41 / 12 14 - [email protected]

The current addresses of our international agents are available on the Internet: www.kromschroeder.com information contacts

Solenoid valves for gas VASTable of contentsApplicationApplication examplesSolenoid valve for gasDouble disc solenoid valveGas solenoid valve with inlet and outlet pressure switchGas solenoid valve with two outlet pressure switchesGas solenoid valve with pilot gas valveGas solenoid valve with pilot gas valve and pressure switchGas solenoid valve with bypass valve

CertificationFunctionVAS..N, quick openingVAS..L, slow openingVAS..S, position indicator and visual indicatorVAS connection diagram

Replacement possibility for solenoid valves for gas with threaded connectionVG is to be replaced by VAS

Replacement possibility for MODULINE solenoid valves for gasVS is to be replaced by VAS

Flow ratekv valueExample

SelectionProject planning informationInstallation

AccessoriesPressure switch for gas DG..CBypass valve VAS 1

Technical dataDimensions

Maintenance cyclesContact

Documents

ti_vas_gb