Steam Traps

GESTRA Steam Trapsand Steam Trap Monitoring Equipment

Steam Trap Selection .................................................................................................. 5

Thermostatic Steam Trap BK with Duo S.S. (Bimetallic) Regulator .................... 6 – 7

Thermostatic Steam Trap MK with Membrane Regulator .................................... 8 – 9

Ball Float Trap UNA, UNA Special .................................................................. 10 – 14

Stainless Steel Traps MK, SMK, UNA ........................................ see MK, SMK, UNA

Steam Traps for Special ApplicationsCondensate Drain Valves AK .................................................................... 16 – 18Steam Trap with Adjustable Discharge Temperature UBK ........................ 16 – 18Steam Trap for SIP Applications SMK ........................................................ 16 – 18Steam Trap for Low-Pressure Steam Heating Plants MK .......................... 16 – 19Steam Traps for Large Condensate Flowrates TK, GK.............................. 16 – 19Steam Traps for Large-Scale Installations BK, DK .................................... 20 – 21

Steam Traps for Air-Venting BK, MK ........................................................ see BK, MK

Steam Trap Units ECONOline for UNIVERSAL (Swivel) Connectors .................... 22

Ball-Float Traps for Draining Condensate from Compressed-Air and Other Gas Lines UNA .................................................................................. 23

Why Testing Steam Traps ..........................................................................................24

Steam Trap Monitoring Equipment VK, VKE, VKP .......................................... 25 – 26

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We create new dimensions of energy savings

The cost-effective, trouble-free and energy-saving operation of an installation depends on reliable and job-proven steam traps that dischargecondensate without loss of steam.

GESTRA's innovative new ultra-compact ECONOline Steam Trap seriesoffers you all these benefits. Three different steam trap types with identical dimensions and suitable for all conventional Universal Connectors areavailable. And it goes without saying thatall steam trap units operate without lossof live steam!

Cost-saving benefits• Automatic adaptation to varying

pressure conditions• No loss of live steam• Ability to vent air• Long service life• Suitable for superheated steam• Fully functional even without internal

water level• Reduced space requirements

The ECONOline series offers youthree different trap types with identical ultra-compact bodies tailored to meet all steam trappingrequirements.

GESTRA ECONOline Steam TrapUnits – another milestone on theroad to reduced operating costsand high operating efficiency

GESTRA ECONOline Steam Trap Units for Universal Connectors

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5

Ball

float

trap

type

UNA

with

Sim

plex

con

trol

Ball

float

trap

type

UNA

with

Dup

lex

cont

rol

Trap

type

MK

with

mem

bran

e re

gula

tor

Trap

type

BK

with

bim

etal

lic re

gula

tor

For steam and energy management, we are right on target

For “cold” condensates or condensates with asaturation curve deviating from that of water onlyfloat traps featuring Simplex control (without thermal venting) can be used.

Steam Trap SelectionNot all steam trap types are equally suitable for a given appli-cation. Depending on the operating conditions and service inquestion, one or more systems will be particularly well suited.

The following table contains 15 criteria for steam trap selection based on the operation of the plant and the specificrequirements on the part of the plant owner.

Ratings:1 = Excellent2 = Good3 = Fair or conditional– = Not recommended, unsuitable

Steam trap types

Criteria Please note:1. Operation with Condensate from steam 1 1 1 1

different Condensate from compressed air – – – 1condensates Condensate, distillate from

– – – 1chemical products

2. Different modes Continuous operation:of operation Constant formation of condensate; 2 1 1 1

flowrate and pressure varyDiscontinuous operation:Intermittent formation of condensate; 2 1 1 3*) *) e. g. air venting difficultiesflowrate and pressure vary stronglyAny operation: Heat exchanger may

3**) 2 1 3*)*) Air venting difficulties, **) With partial load (reduced

be controlled on the steam side differential pressure) flowrate possibly not sufficient3. Operation with Up to approx. 30 % of upstream pressure 1 1 1 1

back pressure From 30 % to 60 % of upstream pressure 3*) 1 1 1 *) Possibly readjustment required

> 60 % of upstream pressure 3*) 1 1 1 *) Possibly readjustment required4. Sensitivity to dirt Highly contaminated condensate 1 1 1 15. Air-venting Automatic 1 1 1 3*) *) Manual air-venting

This may apply to small heat exchangers (e. g. laboratory equipment)*) Possibly readjustment required

**) Might require special membrane regulator

6. Condensate Condensate temperature nearlydischarge at boiling temperaturedefinite

2*) 2**) 1 1

temperaturesCondensate undercooling *) with U-type regulator or by readjustmentapprox. 30 K (required)

1*) 1**) – –**) with U-type capsule

Condensate undercooling *) By a corresponding readjustment reduction adjustable 2*) – – – in flowrate; if possible use steam trap with

adjustable discharge temperature UBK

7. Frost resistance 1 1 1*) 3*) *) Only ensured with V-type design8. Condensate Intermittent condensate formation 1 1 1 1

discharge without Reduced condensate formation (< 10 kg/h) 1 1 1 1loss of live steam Continuous condensate formation (> 10 kg/h) 1 1 1 1

9. Resistance to waterhammer 1 1*) 3*) 3*) *) Built-in non-return valve = 110. Non-return valve action 1 1*) –*) –*) *) Built-in non-return valve = 111. Application in vacuum 3 2 1 112. Installation in any position 1 1 –*) –*) *) UNA 1. . . can be converted13. Ease of maintenance 1 1 1 114. Service life of control unit 1 2 1 115. Application with superheated steam 1 3 3*) 1 *) UNA 1. . like MK, UNA 2.. not recommended

Technical information on steam trapping and trap selectionTitle of publication GESTRA Information# / MediumSteam trap selection program CD-ROMCondensate manual: Basic principles of steam trapping, sizing of steam and condensate return lines, Paperback selection and application of steam traps etc.

Physical basis for evaluating steam-trap performance A 1.1Automatic drainage of steam and condensate systems during start-up and shut-down A 1.2Waterhammer and how to avoid it A 1.3How to avoid operating trouble A 1.5Ball-float traps for draining compressed-air plants A 1.6Automatic deaeration of steam-heated heat exchangers A 1.7Drainage of rotary cylinders A 1.8Utilization of sensible heat of condensate C 1.2

6

• Robust regulator for roughest operatingconditions (unaffected by waterhammerand frost)

• Suitable for superheated steam applications

• Automatic air-venting (steam trap can be used for thermal air-venting in steam systems)

• Installation in any position (horizontal and vertical lines)

• Stage nozzle acts as non-return valve

• Stainless steel internals

• Repairable in-line

• Base bushing ensures positive metal-to-metal sealing between body andregulator.

• Up to ∆p 250 bar g

• Optional extra: Integrated steam trapmonitoring for BK 45 (temperature orsteam loss)

BK 15, DN 40, 50 mm

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L

Features of the BK series

Thermostatic Steam Traps BK with Duo Stainless Steel (Bimetallic) Regulator PN 40 – PN 630

Pressure/Temperature Ratings *)

BK 45, BK 46DN 15, 20, 25 mm

ApplicationFor open-loop controlled heating processes.Draining of– saturated steam lines– superheated steam lines– steam tracers

Can also be used for thermal air-venting

Air-ventingSteam trap for thermostatic air-venting with bimetallic regulatorThe thermostatic steam traps with corrosion-resistant Duo S.S. (bimetallic) regulator of the BKseries can also be used for air-venting.

ApplicationThermostatic steam trap for automatic air-venting and discharge of non-condensable gasesand steam/air mixtures from steam lines and heat exchangers.Special adjustment might be required.

PN ∆ PMX Material Max. Pressure/Temp. RatingType

Class [bar] EN ASTM PMA / TMA PMA / TMABK 451) PN 40 22 1.04602) A 1052) 28.4 bar / 250 °C 23.1 bar / 400 °CBK 15 DN 40/50 PN 40 22 1.04602) A 1052) 28.4 bar / 250 °C 23.1 bar / 400 °CBK 465) PN 40 32 1.5415 A 182 F 13) 30.2 bar / 300 °C 25.8 bar / 450 °CBK 27N PN 63 45 1.5415 A 182 F 13) 47.6 bar / 300 °C 25.8 bar / 500 °CBK 28 PN 100/160 85 1.5415 A 182 F 13) 124.2 bar / 350 °C 34.3 bar / 530 °CBK 29 PN 160 110 1.7335 A 182 F 12 146.1 bar / 350 °C 44.5 bar / 540 °CBK 212 PN 630 250 1.7380 A 182 F 222) 447.5 bar / 500 °C4) 163 bar / 580 °C4)BK 28 ASTM Class 600 85 – A 182 F12 80.4 bar / 350 °C 50.6 bar / 500 °CBK 29 ASTM Class 900 110 – A 182 F12 120.7 bar / 350 °C 43.6 bar / 540 °CBK 212 ASTM Class 2500 250 – A 182 F22 231.7 bar / 500 °C 63.0 bar / 593 °C1) Also available: BK 45 U (discharges condensate with approx. 30 K undercooling).2) Material complies with EN and ASTM requirements.3) Physical and chemical properties comply with EN grade.

ASTM nearest equivalent grade is stated for guidance only.4) DN 25 mm with special nuts and bolts.5) BK 46 replaces BK 16.

*) For more information see data sheet.

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Thermostatic Steam Traps BK with Duo Stainless Steel (Bimetallic) Regulator PN 40 – PN 630

Available End Connections and Overall Lengths

Capacity ChartsThe charts show the maximum hot condensate capacities.

BK 45 DN 15-25 ∆pmax 22 bar (Curve 1) BK 46 DN 15-25 ∆pmax 32 bar (Curve 1)BK 15 DN 40 and 50 ∆pmax 22 bar (Curve 2)

Overall length (L) in mmType Connection DN 15 DN 20 DN 25 DN 40 DN 50

1/2" 3/4" 1" 11/2" 2"BK 45 Flanged DIN PN 40 150 150 160 230 230

Flanged ASME 1501) 150 150 160 230 230DN 15 – 25 mm Flanged ASME 3001) 150 150 160 230 230BK 15 Screwed sockets 95 95 95 130 230DN 40, 50 mm Socket-weld (SW) 95 95 95 130 230

Butt-weld (BW) 200 200 200 250 250BK 46 Flanged DIN PN 40 150 150 160 – –

Flanged ASME 300 150 150 160 – –Screwed sockets 95 95 95 – –Socket-weld (SW) 95 95 95 – –

BK 27N Flanged DIN PN 40 – – – 230 230Flanged DIN PN 63 – – – 260 300Flanged ASME 400/600 – – – 241 292Socket-weld (SW) – – – 180 180Butt-weld (BW) – – – 180 180

BK 28 Flanged DIN PN 100 210 230 230 – –Socket-weld (SW) 160 160 160 – –Butt-weld (BW) 160 160 160 – –

BK 28 ASTM Flanged ASME 400/600 230 230 230 – –Screwed NPT 160 160 160 – –Socket-weld (SW) 160 160 160 – –Butt-weld (BW) 160 160 160 – –

BK 29 Flanged DIN PN 160 210 230 230 – –Socket-weld (SW) 160 160 160 – –Butt-weld (BW) 160 160 160 – –

BK 29 ASTM Flanged ASME 900/1500 230 230 254 – –Socket-weld (SW) 200 200 200 – –Butt-weld (BW) 200 200 200 – –

BK 212 Socket-weld (SW) 330 330 330 – –Butt-weld (BW) 330 330 330 – –

BK 212 ASTM Socket-weld (SW) 330 330 330 – –Butt-weld (BW) 330 330 330 – –

1) BK 45 with ASME flanges: overall length 172 mm available on request.

BK 27N, DN 40, 50 mm

L

BK 28, BK 29, DN 15, 20, 25 mmL

BK 212, DN 15, 20, 25 mm

L

BK 27N ∆pmax 45 bar (Curve 1) BK 28/BK 28 ASTM ∆pmax 85 bar (Curve 2)BK 29/BK 29 ASTM ∆pmax 110 bar (Curve 2)BK 212/BK 212 ASTM ∆pmax 250 bar (Curve 3)

Differential pressure ∆PMX, assuming discharge to atmospheric pressure

Differential pressure ∆PMX, assuming discharge to atmospheric pressure

8

Thermostatic Steam Traps MKwith Membrane Regulator PN 25 – PN 40

• Very sensitive response characteristic

• Function is not impaired by high back pressure

• Automatic air-venting (trap can be used for thermal air-venting in steam systems)

• Installation in any position (horizontal and vertical lines)

• High hot-water capacities even with lowdifferential pressures

• With tandem seat (double sealing) for low condensate flowrates

• Built-in non-return valve

• Stainless steel internals (corrugatedmembrane of Hastelloy)

• Design “U” with undercooling capsule: utilization of a certain amount of sensibleheat by banking-up of condensate,decreasing the amount of flash steam

• Optional extra: Integrated condensatemonitoring for MK 45 (temperature orsteam loss)

MK 35/31, DN 10, 15 mm

L

Features of the MK series

Specification

MK 45-1DN 15, 20, 25 mm

L


STAIN

LESS

STEEL

STAINLESS

STEEL

STAINLESS

STEEL

Air VentingSteam Trap for Thermostatic Air-Venting with Membrane RegulatorThe thermostatic steam traps with membrane regulators of the MK series can also be used for air-venting.

ApplicationThermostatic steam trap for automatic air-venting and discharge of non-condensable gasesand steam/air mixtures from steam lines and heat exchangers.A special type of membrane might be required.

Type Design/Application

MK 45-1 With tandem seat (double sealing)MK 35/31 1) For low condensate flowrates, steam-tracing, steam-line drainage,

air-ventingMK 45-2 With single seatMK 35/32 1) For medium condensate flowrates, steam-tracing, drainage of heat

exchangers, air-ventingWith single seatFor large condensate flowrates,drainage of heat exchangers

MK 36/51 1) With tandem seat (double sealing)For low condensate flowrates, steam tracing, steam-line drainage,venting and vacuum-breaking. Also suitable for food, biological and pharmaceutical applications.

MK 45 A-1 For small and large condensate flowrates; steam-tracing,MK 45 A-2 steam-line drainage, air-venting

1) Can also be used for vacuum breaking (aerating).

PN ∆ PMX Material Max. Pressure/Temp. RatingType

[bar] EN ASTM PMA / TMA PMA / TMAMK 35/31 PN 25 21 1.04601) A 1051) 18.6 bar / 225 °C 14.4 bar / 400 °CMK 35/32 PN 25 21 1.04601) A 1051) 18.6 bar / 225 °C 14.4 bar / 400 °CMK 45-1 PN 40 22 1.04601) A 1051) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 45-2 PN 40 22 1.04601) A 1051) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 35/2 S DN 25 PN 40 22 1.0460 A 105 3) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 35/2 S3 DN 25 PN 40 22 1.0460 A 105 3) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 25/2 DN 40/50 PN 40 22 1.0460 A 105 3) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 25/2 S DN 40/50 PN 40 22 1.04602) A 105 2) 3) 28.4 bar / 250 °C 23.1 bar / 400 °CMK 36/51 – 32 1.4301 4) A 182 F304 32 bar / 240 °C 32 bar / 240 °CMK 45 A-1 PN 40 22 1.4404 1) A 182 F316 L1) 29.3 bar / 200 °C 24 bar / 400 °CMK 45 A-2 PN 40 22 1.4404 1) A 182 F316 L1) 29.3 bar / 200 °C 24 bar / 400 °C1) Material complies with EN and ASTM requirements.2) MK 25/2 S DN 40/50: cover made of cast steel GS-C 25

(ASTM nearest equivalent: A 216 Gr. WCB)3) Physical and chemical properties comply with EN grade.

ASTM nearest equivalent grade is stated for guidance only.4) EN nearest equivalent grade is stated for guidance only.*) For more information see data sheet.

MK 25/2 1)MK 25/2 S 1)MK 35/2 S 1)MK 35/2 S3 1)

MK 35/2 S, DN 25 mm

L

LMK 35/2 S3, DN 25 mm

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Thermostatic Steam Traps MKwith Membrane Regulator PN 25 – PN 40

MK 25/2 , DN 40, 50 mm


MK 25/2 S, DN 40, 50 (Curve 1)MK 25/2, DN 40, 50 (Curve 2)

MK 45-1 (Curve 1)MK 45-2 (Curve 2)MK 36/51 (Curve 3)

MK 35/31 (Curve 1)MK 35/32 (Curve 2)

STAINLESS

STEEL

STAINLESS

STEEL

Available End Connections and Overall Length

MK 35/2 S3, DN 25 (Curve 3)MK 35/2S, DN 25 (Curve 4)

MK 25/2DN 40 – 50MK 25/2 SDN 40 – 50MK 35/2 SMK 35/2 S3DN 25

L

MK 25/2 S, DN 40, 50 mm

L

MK 36/51, DN 8, 10, 15, 20 mmConnection: screwed socket

MK 36/51, DN 8, 10, 15, 20 mmConnection:

hinged clamp

MK 36/51, DN 15 mmDesign with union butt-weld nipples

LL L

Overall length (L) in mmType Connection DN 8 DN 10 DN 15 DN 20 DN 25 DN 40 DN 50

1/4" 3/8" 1/2" 3/4" 1" 11/2" 2"MK 45-1 Flanged DIN PN 40 – – 150 150 160 – –MK 45-2 Flanged ASME 1501) – – 150 150 160 – –

Flanged ASME 3001) – – 150 150 160 – –MK 45 A-1 Screwed sockets – – 95 95 95 – –MK 45 A-2 Socket-weld (SW) – – 95 95 95 – –

Butt-weld (BW) – – 200 200 200 – –MK 35/31 Screwed sockets – 70 70 – – – –MK 35/32 Socket-weld (SW) – – 95 – – – –

Flanged DIN PN 40 – – – – 160 230 230Flanged ASME 150 – – – – 160 230 230Flanged ASME 300 – – – – 160 230 230Screwed sockets – – – – 95 130 230Socket-weld (SW) – – – – 95 130 230

MK 36/51 Screwed sockets 65 65 65 65 – – –Union butt-weldnipples 2)

– – 150 – – – –

Progressive ring fitting – 93.5 93.5 93.5 – – –Hinged clamp – 65 65 65 65 – –

1) MK 45 with ASME flanges: overall length 172 mm available on request.

2) Made of carbon steel orstainless steel 1.4435

10

Ball-Float Traps UNAPN 16 – PN 160

Features of the UNA series• Unaffected by back pressure and

condensate temperature

• No loss of live steam due tocontinuous water seal at the seat

• No banking-up of condensate evenwith extreme load and pressurefluctuations

• Particularly well suited for heatexchangers controlled from the steamside

• Unaffected by dirt

• Automatic thermostatic air-venting(Duplex design)

• Ideal for discharging coldcondensates, distillates andcondensates derived from chemicalproducts (Simplex design)

• Repairable in-line

• Thanks to the rolling ball valve onlyreduced operating forces and smallcontrol units are required (compact,lightweight design for large flowrates)

L

UNA 23/25/26hDN 15 – 50 mm

UNA 23/25/26 vDN 15 – 50 mm

ApplicationCondensate discharge without banking-up, even at varying operating conditionsand back pressure. Automatic air-venting (Duplex design). Also for thedischarge of cold condensates anddistillates, and for draining gas andcompressed air systems (Simplexdesign).

L

L2

UNA 27 hDN 25 – 50 mm

UNA 39DN 15, 25, 50 mm

L1

Pressure/Temperature Ratings and Designs **)

STAINLESSSTEEL

STAINLESSSTEEL

Type PN∆PMX Materials Pressure/Temperature Ratings[bar] EN ASTM 1) PMA / TMA PMA / TMA

UNA 14*) 25 13 EN-JS 1049 – 25 bar / 20 °C 15 bar / 350 °CUNA 23 16 13 EN-JL 1040 A126 Cl. B 16 bar / 120 °C 9.6 bar / 300 °C

UNA 16*) 40 221.0460; A105;

40 bar / 20 °C 23.1 bar / 400 °C1.0619 A216 WCB

UNA 25 40 32 EN-JS 1049 – 32 bar / 250 °C 25 bar / 350 °C

UNA 26 40 321.0460; A105;

26 bar / 250 °C3) 21 bar / 400 °C1.0619 A216 WCB

UNA 27 h 63 45 1.5419 A217 WC1 56 bar / 250 °C 40.6 bar / 450 °CUNA 39 160 140 1.7335 A182 F12 160 bar / 300 °C 35 bar / 550 °CUNA-SpecialTyp 62

16 16 EN-JL 1040 A126 Cl. B 16 bar / 120 °C 9.6 bar / 300 °C

UNA-Special 25 22 1.0619 A216 WCA 22.6 bar / 120 °C 14.4 bar / 400 °CUNA 25 22 1.0619 A216 WCA 22.6 bar / 120 °C 14.4 bar / 400 °CUNA-Special 63 45 1.5419 A217 WC1 56 bar / 250 °C 40.6 bar / 450 °CUNA 16 A

25 211.44042) A182 F 316L2) 40 bar /

25.8 bar / 300 °C1.4308 2) A351 CF8 2) –196 °C / 20 °C

UNA 26 h 40 32 1.4408 A351 CF8 M 40 bar / 20 °C 25.8 bar / 300 °C

1) ASTM nearest equivalent grade is stated for guidance only.Physical and chemical properties comply with EN grade.

2) Body/cover material 3) UNA 26 DN 40, DN 50: 26 bar/250 °C

*) UNA 14 replaces UNA 13UNA 16 replaces UNA 15

**) For more information see data sheet.h: for horizontal lines

UNA 14/16 vDN 15 – 25 mm

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Ball-Float Traps UNAPN 16 – PN 160

L1

L1

L2

L2

UNA-Special Type 62, PN 16UNA-Special, PN 25UNA-Special, PN 63

UNA PN 25


Optional Items for Ball-Float Traps

Available Designs

TypeOrifice (O) for Control unit

horizontal vertical angle patternmax. differential pressure Simplex Duplex Simplex-R

UNA 14*) x1) x1) O 4, 13 x x xUNA 16*), 16A*) x1) x1) O 4, 13, 22 x x xUNA 23 x x O 2, 4, 8, 13 x x xUNA 25/26 x x O 2, 4, 8, 13, 22, 32 x x xUNA 27 h x O 16, 28, 45 x xUNA 39 x O 80, 110, 140, 140 max. xUNA-Special Typ 62, PN 16 x O 22)3), 3.54), 5, 10, 16 x6) x2)7)UNA-Special PN 25 x O 25), 3.54), 5, 10, 16, 22 x6) x7)UNA PN 25 x O 2, 3.5, 5, 8, 12, 16, 22 x6)UNA-Special PN 63 x O 16, 22, 32, 40, 45 x6)

1) A conversion of “h” to “v” or vice versa is possible2) This design is not available for DN 100 mm3) This design is not available for DN 80 mm4) This design is not available for DN 65 mm

5) This design is not available for DN 50 mm6) Simplex: Flow control + hand vent valve + float lifting lever7) Duplex: Flow control + automatic air-venting*) UNA 14 replaces UNA 13, UNA 16 replaces UNA 15

Item TypeSightglass cover UNA 23Float lifting lever with gasket UNA 23, 25, 26 (UNA 27 on request)Vent valve with gasket (for Duplex design) UNA 23, 25, 26, 27

Simplex: Float control (without thermostatic bellows)Duplex: Flow control + automatic air-ventingSimplex-R: Float control + inner vent pipe

Type ConnectionOverall length (L) in mm

DN 15 DN 20 DN 25 DN 40 DN 501/2" 3/4" 1" 11/2" 2"

UNA 14h, 14v Flanged EN PN 16 150 150 160 – –Screwed sockets 95 95 95 – –

UNA 16h, 16v Flanged EN PN 25 150 150 160 – –UNA 16Ah, 16 Av Flanged ASME 150 RF 150 150 160 – –

Screwed sockets 95 95 95 – –Socket-weld (SW) 95 95 95 – –Butt-weld (BW) 200 200 200 – –

UNA 23h, 23v Flanged EN PN 16 150 150 160 230 230UNA 25h, 25v Flanged EN PN 40 150 150 160 230 230UNA 26h, 26v Flanged EN PN 40 150 150 160 230 230UNA 26h Flanged EN PN 40 210 210 230 320 320

UNA 26h Flanged ASME 150 + 300 RF 210 210 230 320 320Screwed sockets 200 200 200 255 255Socket-weld (SW) 200 200 200 230 230Butt-weld (BW) 200 200 200 230 230

UNA 27h Flanged EN PN 63 – – 300 420 416Flanged ASME 600 RF – – 300 421 427Socket-weld (SW) – – 300 420 420Butt-weld (BW) – – 300 420 420

UNA 39 L1/L2 L1/L2 L1/L2

Flanged EN PN 160 215/285 – 230/300 – 245/315Flanged ASME 900 RF 250/320 – 260/330 – 280/350Butt-weld (BW) 170/240 – 170/240 – 170/240

Type ConnectionLength L1/L2 in mm

DN 50 DN 65 DN 80 DN 1002" 21/2" 3" 4"

UNA-Special Flanged EN PN 16 L1 – 470 490 700Typ 62, PN 16 L2 – 395 420 595UNA-Special Flanged EN PN 25 L1 445 470 – –PN 25 L2 345 395 – –UNA PN 25 Flanged EN PN 25 L1 – – 140 140

L2 – – 335 400UNA-Special Flanged EN PN 63 L1 – 565 690 700PN 63 L2 – 400 435 450

STAINLESSSTEEL

STAINLESSSTEEL

12

UNA 27 h UNA 39, DN 15, 25 and 50

Ball-Float Traps UNAPN 16 bis PN 160

Capacity ChartsThe charts show the maximum hot condensate capacities for the range of float-controlled orifices (O) and sizes available.

UNA 14, UNA 16 UNA 23, UNA 25, UNA 26

, AO 22

Differential pressure ∆PMXDifferential pressure ∆PMX

Differential pressure ∆PMX Differential pressure ∆PMX

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Ball-Float Traps UNAPN 16 bis PN 63

Capacity ChartsThe charts show the maximum hot condensate capacities for the range of orifices (O) and sizes available.

UNA PN 25, DN 80 and 100

UNA-Special Type 62, PN 16

Available orifices(O)

1 DN 80 O 222 DN 80 O 16

DN 100 O 223 DN 80 O 124 DN 100 O 165 DN 80 O 8

DN 100 O 126 DN 80 O 5

DN 100 O 87 DN 80 O 3.58 DN 100 O 59 DN 80 O 2

DN 100 O 3.510 DN 100 O 2

Available orifices(O)1 DN 65 O 162 DN 65 O 10

DN 80 O 163 DN 80 O 104 DN 100 O 165 DN 65 O 56 DN 80 O 57 DN 65 O 2

DN 80 O 3.5DN 100 O 10

8 DN 100 O 59 DN 100 O 3.5

10 DN 100 O 2

10

14

Ball-Float Traps UNA and UNA-SpecialPN 16 bis PN 63

Capacity ChartsThe charts show the maximum hot condensate capacities for the range of orifices (O) and sizes available.

UNA-Special PN 63 (PN 40)

Available orifices(O)

1 DN 65 O 452 DN 65 O 403 DN 80 O 454 DN 65 O 32

DN 80 O 405 DN 100 O 456 DN 65 O 22

DN 100 O 407 DN 80 O 328 DN 65 O 169 DN 100 O 32

10 DN 80 O 2211 DN 80 O 16

DN 100 O 2212 DN 100 O 16

UNA-Special PN 25, DN 50 and 65

Available orifices(O)1 DN 50 O 222 DN 50 O 16

DN 65 O 223 DN 50 O 10

DN 65 O 164 DN 65 O 105 DN 50 O 56 DN 50 O 3.5

DN 65 O 57 DN 65 O 2

Proven Technology. New Ideas. Modern Production.

GESTRA, alwaysone step ahead.

GESTRA STERIline Steam Traps. Simply the best for your SIP applications.

Once again GESTRA is at the fore-front of steam trap technology withthe new SMK 22 STERIline trap. This compact lightweight steam trapfor pharmaceutical production plants is setting new standards in pure-steam sterilization. It is the perfectsolution for all sterile and asepticapplications, superseding expensiveand complex systems for condensatedischarge control.

“Our installations require fast andreliable sterilizing.”

“The immediate removal of pure-steamcondensate even in the event ofsudden and extreme pressure and loadfluctuations is critical for efficient andreliable operation.”

“We are looking for a trap that can alsobe used for air-venting in vessels.”

These are just some examples ofcustomer requirements which aremet by our new SMK 22 STERIlinesteam traps.

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16

AK 45, DN 15, 20, 25 mm

UBK 46, DN 15, 20, 25 mm

SMK 22, DN 15 mm

L

L

L


Steam Trapsfor Special Applications

STAINLESSSTEEL

∆ PMX Materials Max. Pressure/Temperature RatingType PN

[bar] EN ASTM PMA / TMA PMA / TMAAK 45 40 1.04601) A 1051) 28.4 bar / 250 °C 23.1 bar / 400 °CUBK 46 40 32 1.04601) A 1051) 28.4 bar / 250 °C 23.1 bar / 400 °CSMK 22

10 6 1.4435 – 10 bar / 150 °C

MK 20 6 4.5 EN-JM 1030 – 4.5 bar / 250 °C. 3.6 bar / 300 °C.TK 23 16 1 – 10 EN-JL 1040 A 126 Cl.B2) 16 bar / 120 °C 9.6 bar / 300 °CTK 24 25 1 – 14 1.0619 A 216 Gr. WCB2) 22.6 bar / 120 °C 14.4 bar / 400 °CGK 11 163) 6 EN-JL 1040 A 126 Cl.B2) 16 bar3) / 120 °C 9.6 bar / 300 °C

1) Material complies with EN and ASTM requirements.2) ASTM nearest equivalent grade is stated for guidance only.

Physical and chemical properties comply with EN grade.3) GK 11, DN 150 mm = PN 10*) For more information see data sheet.

Application

STAINLESS STEEL

TypeAK 45 Condensate drain valve for discharging condensate from steam

systems during start-up and draining residual condensate at shut-down,with integral Y-type strainer and hand purging knob.Factory-set closing pressure 0.8 bar.

UBK 46 Steam trap with adjustable condensate discharge temperature, thereby suppressing the formation of flash steam.With Y-type strainer.

SMK 22Steam trap for SIP applications.

MK 20 Steam trap for low-pressure steam-heating installations.TK 23, TK 24 Steam trap with thermostatic pilot control using thermostatic

capsules for the discharge of very large condensate flowrates with relatively continuous condensate formation.

GK 111) Thermodynamic steam trap with stage nozzle for the discharge of very large condensate flowrates. With integral Vaposcope (sightglass) for optimum trap adjustment.

1) DN 50 mm: GK 21

17

A1


MK 20, DN 15, 20 mm

TK, DN 50, 65, 80, 100 mm

GK 11, DN 65, 80, 100, 150 mmGK 21, DN 50 mm

L

L

L


STAINLESSSTEEL

Type Connection

Overall length (L) in mmDN DN DN DN DN DN DN DN15 20 25 50 65 80 100 1501/2" 3/4" 1" 2" 21/2" 3" 4" 6"

AK 45 Flanged EN PN40 150 150 160 – – – – –Flanged ASME 150 150 150 160 – – – – –Flanged ASME 300 150 150 160 – – – – –Screwed sockets 95 95 95 – – – – –

UBK 46 Flanged EN PN40 150 150 160 – – – – –Flanged ASME 150 150 150 160 – – – – –Flanged ASME 300 150 150 160 – – – – –Screwed sockets 95 95 95 – – – – –Socket-weld 95 95 95 – – – – –

SMK 22 Butt-weld 83 – – – – – – –

MK 201) Male/female thread 120 125 – – – – – –TK 23 Flanged EN PN16 – – – 230 290 310 350 –TK 24 Flanged EN PN25 – – – 230 290 310 350 –GK 112) Flanged EN PN16 – – – 320 420 420 620 900

1) Straight-through or angle design (see representation)2) DN 50 mm: GK 21

18


Capacity ChartsThe charts show the maximum hot condensate capacities. (Exception: AK 45 – cold water capacity.)

AK 45 Cold Water capacity

UBK 46Service pressure (bar) 1 2 4 8 12 16 20 26 32Opening temperatureat factory setting

(°C) 72 74 78 85 89 93 97 103 109

Capacity at 10 K below94 113 136 164 184 198 211 226 239

opening temperature (kg/h)

Cold-condensate capacity267 390 570 832 1039 1215 1373 1584 1774

at 20 °C (Start-up capacity)(kg/h)

SMK 22

3 4 6 8 10 20 3040

6080

10021

100

200

300

400

500

600

800

10002000

1000

800

600

500

400

300

1

2

∆PMX

[psi]

QC

[kg/

h]

QH

QC

[lb/

h]

0.1 0.3 0.6 1 3 6 100.2 0.4 0.8 2 4 8

[bar]

[kg/h] [lb/h]

The chart shows the maximum capacities forhot and cold condensate.

Curve 1This curve indicates the max. capacity of hotcondensate that the steam trap with regulating membrane Steriline can dischargewith virtually no banking-up.

Curve 2This curve shows the max. capacity of coldcondensate that the steam trap can discharge(20 °C at start-up).

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A1


MK 20


TK 23, TK 24

For differentialpressures < 1 bar use capsule “OH2”(max. service pressure 5 bar).

GK 11, GK 21

20

Steam Trapsfor Large-Scale Installations

BK 35

DK 47

DK 57

The steam traps BK 35 and DK 47/57 are distinguished by their compact,light-weight design and suggest themselves as the ideal economical solution formedium and large-scale installations.ECONOline

L

L

L

Specification

Pressure/Temperature Ratings


∆ PMX [bar] Max. Pressure/Temperature RatingType PN

bar / psi PMA / TMA PMA / TMABK 35 40 22 bar / 319 psi 32 bar / 400 °C 464 psi / 752 °FDK 47 L 63 42 bar / 609 psi 63 bar / 400 °C 914 psi / 752 °FDK 47 H 63 42 bar / 609 psi 63 bar / 400 °C 914 psi / 752 °FDK 57 L 63 42 bar / 609 psi 63 bar / 400 °C 914 psi / 752 °FDK 57 H 63 42 bar / 609 psi 63 bar / 400 °C 914 psi / 752 °F

TypeMaterial

EN ASTMRegulator Application

BK 35 1.0460 A 105 Duo S.S. (bimetallic) For small condensate flowratesDK 47 L 1.40271) A 743 CA 40 F Thermodynamic For small condensate flowratesDK 47 H 1.40271) A 743 CA 40 F Thermodynamic For larger condensate flowratesDK 57 L 1.40211) AISI 420 F Thermodynamic For small condensate flowratesDK 57 H 1.40211) AISI 420 F Thermodynamic For larger condensate flowrates1) Physical and chemical properties comply with ASTM grade.

Length [L] in mmType Connection DN 10 DN 15 DN 20 DN 25

3/8" 1/2" 3/4" 1"BK 35 Screwed NPT – 95 95 95

Screwed BSP – 95 95 95Socket-weld 95 95 95

DK 47 L Screwed NPT 78 78 90 95DK 47 H Screwed BSP – 78 90 95DK 57 L Screwed NPT 55 65 80 –DK 57 H Screwed BSP – 70 80 90

21

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Steam Trapsfor Large-Scale Installations

Capacity Charts

DK 57

DK 47

BK 35

2222

Application

Specification

Steam Trap Units

for UNIVERSAL (Swivel) Connectors

Steam trap unit BK 35A/7

Steam trap unit MK 35A/7

Steam trap unit DK 36A/7

PN ∆ PMX Materials Pressure / TemperatureType

Class [bar] EN ASTM PMA / TMA PMA / TMABK 35A/7 300 22 1.4408 A 351-CF8M 49.6 bar / 20 °C 29.3 bar / 400 °CMK 35A/7 300 22 1.4408 A 351-CF8M 49.6 bar / 20 °C 29.3 bar / 400 °CDK 36A/7 300 29 1.4408 A 351-CF8M 49.6 bar / 20 °C 29.3 bar / 400 °CUC, UCY 300 - 1.4408 A 351-CF8M 49.6 bar / 20 °C 29.3 bar / 400 °C

Available Connections and Lengths

Type ConnectionLength L

1/2" 3/4" 1"BK 35A/7; MK 35A/7; DK 36A/7 Universal connector 65 65 65UC, UCY Screwed sockets BSP or 75 75 75

NPT 75 75 75Socket-weld ends, butt-weld ends available on request

TypeBK 35A/7 "Thermostatic/thermodynamic bimetallic" trap unit with corrosion-

resistant Duo S.S. regulator unaffected by waterhammer, for condensate discharge with virtually no banking-up and automatic air-venting of steam lines and tracing systems.

MK 35A/7 "Thermostatic capsule" trap unit with corrosion-resistant membrane regulator 5N1 unaffected by waterhammer, for condensate discharge with virtually no banking-up and automatic air-venting of steam lines and tracing systems.

DK 36A/7 "Thermodynamic" trap unit for condensate discharge with virtually no banking-up and automatic air-venting of steam lines and tracing systems.

UC Universal connectorUCY Universal connector with integrated strainer

Features• Maintenance-free, ultra-compact steam traps made from stainless steel, suitable

for all UNIVERSAL (Swivel) connectors

• Installation in any position

• Integrated seals for connector

• Only two screws make for a quick and easy installation

• All trap units are optionally available with a UNIVERSAL connector (not fitted)

Universal connector with integrated strainer UCY

The chart shows the discharge capacity of hot condensate

ECONOline

ECONOline

ECONOline

L

L

BK 35A/7

DK 36A/7

MK 35A/7

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A1

Ball-Float Traps for Draining Condensate from Compressed-Air and Other Gas Lines UNA

Specification

Capacity Chart Hints on Installation

Features• Air trap with ball float and rolling ball valve used

for draining condensate from compressed-air andother gas lines.

• Valve ball of Perbunan (buna N) for temperatures up to 40 °C, or of stainless steel for temperatures up to 120 °C.

UNA 14 Pv

L

Max.differen- Material Max. service Max. serviceType Design PN tial pressure ASTM1) pressure temperature

∆ PMX [bar] 2) EN equivalent PMA [bar] TMA [°C]UNA 14 P, h + v with S.S. valve ball 25 16 EN-JS 1049 – 25 120(convertible) with Perbunan valve ball 25 16 EN-JS 1049 – 25 401) Physical and chemical properties comply with EN grade. 2) Inlet pressure minus outlet pressure.

Higher pressure ratings and other materials available on request.

UNA 14P


Type ConnectionOverall length L in mm

DN 15 DN 20 DN 251/2" 3/4" 1"

UNA 14 Ph Screwed sockets3) 95 95 95Flanged EN PN 25 150 150 160

UNA 14 Pv Screwed sockets3) 95 95 95Flanged EN PN 25 150 150 160

3) Stock code for traps screwed BSP (ISO). Traps screwed NPT also available at no extra cost.

The condensate/distillate must be free to fall towards the trap. Isolating valves in horizontal lines lead to the formation of water pockets. In this case an air-balancepipe is required (see drawing).

Air line

Air-balancepipe

Air trap for horizontalinstallation

Collectingpocket

With or without valve;valve spindle horizontal

24

Testing Steam Traps

Like any other industrial valve steam traps are subject towear and their correct functioning can be impaired byprecipitated solids and dirt deposits.

To assess the performance of a steam trap the followingquestions have to be answered:

• Does the steam trap work properly?• If not, does the faulty trap cause a loss of steam

(leakage) or banking-up of condensate (obstructeddischarge passage)?

Faulty steam traps are a major source of waste in a steamdistribution system. A trap that is blowing live steam is theworst offender, but traps that are plugged or stuck closedcan also be costly.The decreased plant efficiency due to loss of energy andadditional make-up water results in lost production.Furthermore, an increase of pressure is liable to arise incondensate systems which will lead to difficulties at alllocations where condensate is discharged.The magnitude of such a steam loss depends on the cross-sectional area of the leak and, at the same time, theamount of discharged condensate. Locations where onlysmall amounts of condensate are formed and discharged, e. g. drainage points in steam lines and tracing systems, are particularly problematical. On the other hand, locations where relatively large amounts of condensate are discharged will not give rise to considerable loss of livesteam because of the presence of a large volume of liquid.

Steam traps which are obstructed or stuck closed do notcause loss of energy and/or water but reduce – to a greateror lesser extent – the efficiency of heat-transfer equipmentand steam users. And waterhammer caused by condensatebanking-up leads to considerable physical damage in steamand condensate systems.

Experience shows that installations where no regular traptesting and servicing takes place have a failure rate ofdefective steam traps in the order of 15 – 25 %. Regularmaintenance and trap testing, which should be carried out at least once a year, can strongly reduce the failure rate to 5 %.

Test Systems

Steam traps can be tested during operation by usingsightglasses, ultrasonic listening devices or level meters.

Sightglasses (Vaposcopes Type VK 14, VK 16) providean effective means of observing the flow of liquids in pipework. They are installed upstream of the traps, andallow the assessment of the traps by making their operation visible. A satisfactory trap installation must pass all thewater that flows to it without discharging live steam andmust not be rendered inoperative by particles of dirt or byan accumulation of air.

Level meters use conductivity to monitor steam trapperformance. A test chamber with an integral level electrodeis installed upstream of the trap to detect any defectivesteam trap. The corresponding output signal is displayed bythe Remote Test Unit NRA 1-1x (remote monitoring) or bythe Hand-Held Test Unit NRA 1-2 (local testing). Thesystem VKE can monitor all types and makes of steam traps to detect loss of live steam. The correct operation of RHOMBUSline steam traps type BK 45/46, MK 45, UBK 46can be verified by using the compact-type level probes NRG 16-25, NRG 16-26. The test station NRA 1-1x or thehand-held test unit NRA 1-2 will evalute the data comingfrom the system VKE.

Another way to test traps is to use an ultrasonic listeningdevice which detects the sound produced by steam flowing through the traps. Depending on the test systemused the sound sensed by the device is either graphicallyrepresented in the form of a curve (VKP 40) or indicated by the deflection on the scale of a meter (VKP 10).When using the VKP 10, the field data specialist has toassess the indicator deflection and, consequently, the operation of the steam trap. The VKP 40, however, candirectly track leaks associated with faulty steam traps andprovides comprehensive reporting and a complete trap survey history.

Annual costs caused by steam loss

Number of steam traps installed

Annual failure rate(Empirical value with first check approx. 15 – 25 %)

A Number of defective steam traps

B Steam loss per steam trap (kg/h)

C Annual operating hours

D Annual steam loss (kg) =

E Cost of steam per ton

F Annual loss in EURO =

Example

A Number of defective steam traps 10

B Steam loss per steam trap 3 kg/h

C Annual operating hours 8000

D Annual steam loss 240000 kg

E Cost of steam per ton 15 Euro

F Annual loss 3600 EuroBy the way:

A new steam trap costs – depending on the end connection– only approx. € 160 to € 200.

D /1000 x E

A x B x C

25

A1

Steam Trap Monitoring Equipment

Vaposcope VKThe Vaposcope can be used in horizontal and vertical pipework without any modifications.

Installation upsteam of the steam trap.The application is limited to fluids with pH value 9 (VK 14) or 10 (VK 16).VK 16 comes standard with mica disc.

Test Set VKEConsisting of: Test chamber with integral level electrode NRG 16-19 / NRG 16-21for steam traps of all types and makes. And: Remote test unit NRA 1-1 for simultaneous and continuous monitoring of up to 18 steam traps or: Manual test unitNRA 1-2 for monitoring “in situ”.

VK 14

VK 16

L

L

L

Electrodeconnectioneither on the left or on theright side.

VKE 16

NRG 16-25NRG 16-26


STAINLESSSTEEL

Material Max. Pressure/Temperature RatingType PN

EN ASTM PMA / TMA PMA / TMAVK 14 16 EN-JL 1040 A 126 B1) 16 bar / 120 °C 11.2 bar / 250 °CVK 16 40 1.0460 A 1051) 40 bar / 20 °C 25.8 bar / 300 °CVKE 16 40 1.06192) A 216 - WCB1) 28.4 bar / 250 °C3) 23.1 bar / 400 °C 3)VKE 16A 40 1.4571 TP 316 Ti1) 38 bar / 120 °C3) 32.5 bar / 250 °C 3)

NRG 16-2540 1.4404 F 316L 40 bar / 20 °C 32 bar / 238 °C

NRG 16-261)ASTM nearest equivalent grade is stated for guidance only.

Physical and chemical properties comply with EN grade.2) Forged steel flange (1.0460).3) Max. working pressure/temperature of the electrodes: 32 bar / 238°C.

Sensitivity of electrodes: 1.5 µS/cm.*) For more information see data sheet.

ApplicationTypeVaposcope Sightglass for checking heat exchangers and steam traps (installationVK 14, VK 16 upstream of the traps). Visual supervision of flow conditions in condensate lines.VKE Test set with level electrode for monitoring steam traps

to detect leakage of live steam.Vapophone Ultasonic detector for detecting steam leakage in steam systems; VKP-Ex for monitoring steam traps and stop valves.TRAPtest Computer-based monitoring, recording and evaluation system for steamVKP 40 traps of all types and makes to detect loss of steam and condensate banking up.

Level electrodes Level electrodes for fitting into RHOMBUSline steam trap bodies. Signal if a NRG 16-25 steam trap is passing live steam. Used in conjunction with test unit NRA 1-1a,NRG 16-26 NRA 1-1a, NRA 1-1e or hand-held test unit NRA 1-2. Response sensitivity 1.0 µS/cm.

Available Connections and Overall Lengths

Type ConnectionOverall length (L) in mm

DN 15 DN 20 DN 25 DN 40 DN 501/2" 3/4" 1" 11/2" 2"

VK 14 Flanged EN PN 16 130 150 160 200 230VK 16 Flanged EN PN 40 150 150 160 230 230

Flanged ASME 150 150 150 160 230 230Flanged ASME 300 150 150 160 230 230Screwed sockets 95 95 95 130 210Socket-weld 95 95 95 130 210

VKE 16 Flanged EN PN 40 150 150 160 – –Flanged ASME 150 150 150 160 – –Flanged ASME 300 150 150 160 – –Screwed sockets 95 95 95 – –Socket-weld 95 95 95 – –

VKE 16 A Flanged EN PN 16 150 150 160 230 230NRG 16-19

External thread 3/8" BSP Nominal length = 31 mmNRG 16-21NRG 16-25

External thread for fitting into RHOMBUSline trap bodiesNRG 16-26

26

Steam Trap Monitoring Equipment

1

1 2 3 4 5 6

0TEST

2

34 5

6

7

8

910

The VKP 10 is used to detect sound in the ultrasonic range as caused by flowing steam through a steam trap.

The ultrasonic vibrations are detected by a probe andconverted into electric signals which are indicated on the meter of a measuring instrument.

Protection: IP 41

Measuringinstrument

Name plate Battery charger

220 V/50 Ω

Measuring Charging

Connectingcable

Sensitivity adjustor Meter

Connectingcable

Test Set VKE

Probe

Vapophone Ultrasonic Detector VKP 10

NRA1-2

TEST

ok

NRA1-1

ok

1

2

9

8

7

6

5

4

3

18

17

16

15

14

13

12

11

10

Remote Monitoring“In-Situ” Monitoring

Test chamber VKE 16/16A

ElectrodeNRG 16-21

Manual test unit

up to 18test chambersVKE 16/16A

Screening cable max.500 m long

Remote test unit NRA 1-1a/NRA 1-3aor NRA 1-1e/NRA 1-3eElectrode

NRG 16-19

NRA 1-2

Monitoring, Recording and Evaluation System for steam traps of all types and makesWith the aid of the VKP 40Ex (explosion proof) – intrinsicallysafe version for hazardous locations – or the VKP 40 steamtraps can be checked for loss of live steam and banking-up ofcondensate, thus evaluating their performance. The PC software enables: Recording and organising of all steam trap data Storage and evaluation of all test results Simple and easy steam loss calculation for failed steam traps Print out of clearly listed repair jobs.Features: Hand-held terminal with user-friendly interface for ease of ope-

ration (only 5 keys) Illuminated display for showing the recorded sound emissions

as curves (visual indication of steam losses) Data exchange between PC and hand-held terminal at the

click of the mouse PC software works with windows versions from other

countries Protection: IP 65 VKP 40Ex approval BVS 03 ATEX E 149

CE 0158 Ex II 2G Eex ib II C T4

TRAPtest VKP 40/VKP 40Ex

Testing and diagnostic system

similar to photo

Documents

Steam Traps