Description Function Pressure & temperature ratings

Duo Steam Trap BK 212, BK 212-S, BK 212-F91, BK 212-F91-S, BK 212-1.4901, BK 212-ASMEDN 15, 20, 25

DescriptionThermostatic/thermodynamic steam trap with corrosion resistant Thermovit® regulator (S. S. bimetallic plates) able to withstand waterhammer. With internal strainer and integral nonreturn valve action. Asbestosfree body gasket (graphite/CrNi). Installation in any position.The default factory setting enables the steam trap to discharge condensate with virtually no bankingup.

FunctionDuring startup of the plant the bimetallic (Duo stainless steel) plates are flat. The service pressure acts in the opening direction, the valve is completely open. As the condensate temperature rises, the bimetallic plates deflect, drawing the stage nozzle towards the closed position.As the condensate temperature sinks, the deflection of the Duo stainless steel plates decreases and the steam trap opens at the adjusted opening temperature.The thermostatic and spring characteristics of the stack of plates are balanced such that condensate is always discharged at a given undercooling temperature.The steam trap provides automatic airventing at startup and during operation of the plant. BK 212 can also be used for thermal airventing in steam systems.

Pressure & temperature ratings

BK 212, body/cover: 1,7383, screws: 1.7709

PMA (max. allowable pressure) [bar]g 630 630 543 447 306 261

TMA (max. allowable temperature) [°C] 20 300 480 500 530 540

Maxiumum differential pressure Δ PMX [bar] 275Calculated in accordance with DIN EN 125162

BK 212-S, body/cover: 1,7383, screws: 1.4923




BK 212-F91, body/cover: 1.4903/F91, screws: 1.4923




BK 212-F91-S, body/cover: 1.4903/F91, screws: 1.4980




BK 212-1.4901, body/cover: 1.4901, screws: 1.4980




BK 212-ASME, body/cover: ASTM A182 F22, screws: A193 B16 (standard)



PMA (max. allowable pressure) [psi]g 6250 4430 3220 2230 1455 915

TMA (max. allowable temperature) [°F] 100 750 950 1000 1050 1100

Δ PMX (admissible differential pressure)[bar] 275

[psi] 3625

Calculated in accordance with ASME B16.34

Attention: The selected end connections may reduce the pressure/temperature ratings.

BK 212 ..

BK 212-ASME

Data Sheet 818532-02Issue Date: 08/10

Materials

Type BK 212 BK 212-S

Designation DIN / EN DIN / EN

Body and cover 1.7383

Expansion bolt and cap nut 1.7709 1.4923

Thermovit® regulator Corrosion resistant Duo S. S.

Nozzle steam and seat Wearresistant titanium alloy

Other internals High grade steels

Type BK 212-F91 BK 212-F91-S

Designation DIN / EN DIN / EN


Expansion bolt and cap nut 1.4923 1.4980




Type BK 212-1.4901

Designation DIN / EN


Expansion bolt and cap nut 1.4980




Type BK 212-ASME

Designation ASTM

Body and cover ASTM A182 F22

Set screw with collar A193 B16




L

∅ 140 mm

(5½")150

mm

(515

/16"

)≈

150

mm

(515

/16")

≈ 1

02 m

m (4

")

Dimensions

BK 212 with butt-weld ends– continued on page 3 –

Design BK 212, BK 212-F91

A

B

C

D

E

G

F

I

A Cover

B Strainer

C Gasket

D Thermovit® regulator

E Body

F Cap nut

G Expansion bolt with reduced shank to DIN 2510

I Name plate

Spare parts list see page 4

L

∅ 140 mm

(5½")70 m

m

(2¾

")≈

150

mm

(515

/16")

≈ 1

02 m

m (4

")

Dimensions – continued –

BK 212-ASME with butt-weld ends

Design BK 212-ASME

A

B

C

D

E

H

I

A Cover

B Strainer

C Gasket

D Thermovit® regulator

E Body

H Set screws with collar

I Name plate


Weights and dimensions for traps with socket-weld ends

Type EN 12760ASME B 16.11

BK 212../BK 212-ASMEClass 9000

DN15 20 251/2 3/4 1"

L [mm] 330.0 330.0 330.0

[kg/h] 16.0 16.0 16.0

Weights and dimensions for traps with butt-weld ends

Type EN 12627EN ISO 9692

ASME B 16.25 ASME B 36.10

BK 212../BK 212-ASMEDN

15 20 25 15 20 251/2 3/4 1" 1/2 3/4 1"

for pipe 33.7 x 8.0 26.9 x 5.0 48.3 x 12.5 21.3 x 7.5 26.7 x 7.8 33.4 x 9.1

L [mm] 330.0 330.0 330.0 330.0 330.0 330.0

[kg/h] 16.0 16.0 16.0 16.0 16.0 16.0

Buttweld ends for other pipe sizes available on request.

Weights and dimensions for traps with flanged ends on request.

Butt-weld ends

Socket-weld ends

Duo Steam Trap BK 212, BK 212-S, BK 212-F91, BK 212-F91-S, BK 212-1.4901, BK 212-ASMEDN 15, 20, 25

81853202/082010cm (80875002) · GESTRA AG · Bremen · Printed in Germany

Supply in accordance with our general terms of business.

Capacity ChartThe chart shows the capacities for hot and cold condensate.

Curve 1This curve indicates the max. capacity of hot condensate that the steam trap BK 212 can discharge with virtually no banking up.

Curve 2Discharge capacity of the BK 212 for cold condensate (20 °C).

Capa

city

Differential pressure (assuming discharge to atmospheric pressure)

DWhen ordering please state:Sizing parameters (temperature, pressure), operating parameters (temperature, pressure), reference standard (DIN, EN, ASME etc.), materials, backpressure, condensate flowrate, design, end connection (e. g. pipe diameter), connection size, place of installation or type of steam consumer.The following test certificates can be issued on request, at extra cost:In accordance with EN 102042.1, 2.2, 3.1 and 3.2.All inspection requirements have to be stated with the order. After supply of the equipment certification cannot be established. Charges and extent of the above mentioned certificates as well as the different tests confirmed therein are listed in our price list “Test and Inspection Charges for Standard Equipment”. For other tests and inspections than those listed above, please consult us.

PED (Pressure Equipment Directive)The equipment fulfills the requirements of the Pressure Equipment Directive PED 97/23/EC. For use with fluids of group 2. The equipment is excluded from the scope of the PED according to Article 3.3 and must not bear a CE marking.

ATEX (Atmosphère Explosible)The equipment does not have ist own potential source of ignition and is therefore not subject to the ATEX Directive 94/9/EC. Applicable in Ex zones 0, 1, 2, 20, 21, 22 (1999/92/EC). The equipment does not bear an Ex marking.

Capacity Chart

Item Designation Stock code #

C D Thermovit® regulator, complete, including gasket 371862

C Gasket (graphite/CrNi) 374009

B Strainer 096345

BC

Spare Parts

GESTRA AG Münchener Straße 77, 28215 Bremen, GermanyTelefon +49 421 35030, Telefax +49 421 3503393Email [email protected], Web www.gestra.de

Steam TrapsBK 45, BK 45-U, BK 45-LT, BK 46PN 40DN 15, 20, 25 (½", ¾", 1")

DescriptionWhen the plant is started up, the trap is fully open. Cold condensate and air are discharged. With rising temperature, the Duo (bimetallic) stainless steel plates bend and pull the stage nozzle into the closing position. The orifice is then closed immediately below the saturation temperature. Thermodynamic processes taking place in the stage-nozzle chamber support the closing procedure.The trap provides automatic air-venting at start-up and during operation. BK 45 and BK 46 can also be used for thermal air-venting in steam systems.BK 4... with flanges


Pressure /Temperature Ratings & End Connections

BK 45, BK 45-U, flanged PN 40, EN 1092-1

PMA (max. allowable pressure) [bar]g 40.0 33.3 27.6 25.7 23.8 13.1


Δ PMX (admissible differential pressure) [bar] 22Based on EN 1092-1

BK 45, BK 45-U, flanged Class 150, ASME B16.5


TMA (max. allowable temperature) [°C] –29/38 200 300 350 400 425

Δ PMX (admissible differential pressure) [bar] 19.6Based on ASME B16.5, ASME B16.34

BK 45, BK 45-U, flanged Class 300, ASME B16.5, butt-weld ends EN 12627, socket-weld ends EN 12760, socket-weld ends Class 3000, ASME B16.11, screwed sockets G, ISO 228-1, screwed sockets NPT, ASME B16.11



Δ PMX (admissible differential pressure) [bar] 22Based on ASME B16.5, ASME B16.34

BK 45-LT, flanged Class 150, ASME B16.5


TMA (max. allowable temperature) [°C] –46 200 300 350 400 425


BK 45-LT, flanged Class 300, ASME B16.5, butt-weld ends EN 12627, socket-weld ends EN 12760, socket-weld ends Class 3000, ASME B16.11, screwed sockets G, ISO 228-1, screwed sockets NPT, ASME B16.11


TMA (max. allowable temperature) [°C] –46 200 300 350 400 425


BK 46, flanged PN 40, EN 1092-1




BK 46, flanged Class 150, ASME B16.5




BK 46, flanged Class 300, ASME B16.5, butt-weld ends EN 12627, socket-weld ends EN 12760, socket-weld ends Class 3000, ASME B16.11, screwed sockets G, ISO 228-1, screwed sockets NPT, ASME B16.11

PMA (zulässiger Betriebsdruck) [bar]g 51.7 44.2 35.0 32.9 30.9 29.8

TMA (zulässige Temperatur) [°C] –10/50 200 300 350 400 450

Δ PMX (zulässiger Differenzdruck) [bar] 32

Based on EN 1759-1

Materials

Type BK 45, BK 45-U

Designation DIN / EN ASME

Body and cover 1.0460 A105

Hexagon-head cap screws 1.7225 A193 B7

Gasket Graphite/CrNi

Regulator with Duo steel plates Stainless steel

Other internals High-grade steels

Type BK 45-LT

Designation ASME

Body and cover SA350 LF2

Hexagon-head cap screws A193 B7



Other internals High-grade steels

Type BK 46

Designation DIN / EN ASME equivalent*

Body and cover 1.5415 A182 F1

Hexagon-head cap screws 1.7225 A193 B7




*) ASTM material similar to EN material. Observe different physical and chemical properties!

Component PartsBK 45, BK 45-U, BK 45-LT BK 46


9

0

2

1

3

6

5

4

7

8

Key

1 Hexagon-head screw M 10 x 25

2 Name plate

3 Cover

4 Thermovit regulator

5 Bushing (interference fitted, no spare part)

6 Gasket 40 x 48 x 2

7 Body

8 Strainer

9 Gasket A 24 x 29

0 Sealing plug

4

90

6

8

Spare Parts

Dimensions Weights and dimensions for traps with flanged ends

Type EN 1092-1 PN 40

ASME B 16.5 Class 150


BK 45, BK 45-U, BK 45-LT, BK 46

DN15 20 25 15 20 25 15 20 251/2" 3/4" 1" 1/2" 3/4" 1" 1/2" 3/4" 1"

D [mm] 95 105 115 88.9 98.4 107.9 95.2 117.5 123.8

L [mm] 150 150 160 150 150 160 150 150 160

[kg] 3.7 4.3 4.8 3.7 4.3 4.8 3.7 4.3 4.8

Flangedto


Type EN 12627Edge form to ISO 9692, code number 1.3


BK 45, BK 45-U, BK 45-LT, BK 46

DN15 20 25 15 20 25

1/2" 3/4" 1" 1/2" 3/4" 1"

for pipe 21.3 x 2.0 26.9 x 2.3 33.7 x 2.6 21.3 x 2.8 26.7 x 2.9 33.4 x 3.4

L [mm] 200 200 200 200 200 200

[kg] 2.5 2.5 2.5 2.5 2.5 2.5

Butt-weld ends for other pipe sizes available on request.

Butt-weld ends to

Weights and dimensions for traps with screwed sockets

Type BSP: ISO 228-1, NPT: ASME B 16.11

BK 45, BK 45-U, BK 45-LT, BK 46

DN15 20 25

1/2" 3/4" 1"

L [mm] 95 95 95

[kg] 2.2 2.1 2.0

Screwed sockets to

Weights and dimensions for traps with socket-weld ends

Type DIN EN 12760, ASME B 16.11 Class 3000

BK 45, BK 45-U, BK 45-LT, BK 46

DN15 20 25

1/2" 3/4" 1"

L [mm] 95 95 95

[kg] 2.2 2.1 2.0

Socket-weld ends to

L

96

70

D

7088

Item Designation Stock code BK 45, BK 45-LT

Stock code BK 45-U

Stock code BK 46

4 / 6 Thermovit regulator, gasket 375 234 375235 375464

8 9 0 Strainer set, cpl. 375 113 375 113 375113

6 Gasket*) 40 x 48 x 2, graphite 375 159 375 159 375159

9 Gasket*) A 24 x 29, stainless steel 375 162 375 162 375162

*) 50 pcs. For smaller quantities please contact your local dealer.

7088

L

70

96

With

draw

al

dist

ance

Withdrawal distance 30

With

draw

al

dist

ance

30 With

draw

al

dist

ance

Steam TrapsBK 45, BK 45-U, BK 45-LT, BK 46PN 40DN 15, 20, 25 (½", ¾", 1")

Capacity Chart for BK 45, BK 45-U, BK 45-LT

Capacity ChartsThe charts show the maximum capacities for hot and cold condensate.

Curve 1Indicates the max. capacity of hot condensate that steam traps BK 45 and BK 46 with standard regulator can discharge with virtually no banking-up.The BK 45-U (undercooling) discharges the condensate when it is approx. 30 K (degC) below saturation temperature (banking-up of condensate).

Curve 2Discharge capacity for cold condensate at 20 °C.

Specification TextGESTRA Steam trap, DN 15 / DN 20 / DN 25

Type: BK 45 (1.0460)Type: BK 45-U (1.0460, 30 K undercooling) Type: BK 45-LT (SA350 LF2) Type: BK 46 (1.5415)

End connection: Flanged / socket-weld ends / butt-weld ends / screwed sockets

Nominal size: DN 15 / 20 / 25 / ½"/¾"/1" Pressure rating: PN 40 / CL 150 / CL 300 Regulator: Standard, Δt approx. 15 K (BK 45, BK 46) U = Undercooling, Δt approx. 30 K (only BK 45-U)

Inspection & CertificationDocumentation regarding material tests and in-house ex-amination with test report EN10204 available. All inspection requirements have to be stated with the enquiry or order. After supply of the equipment certification cannot be established.Charges and extent of the above mentioned test certificates as well as the different tests confirmed therein are listed in our Price List "Test and Inspection Charges for Standard Equipment". For other tests and inspections than those listed above, please consult us.

Application of European Directives Pressure Equipment Directive (PED) The equipment conforms to this directive and can be usedfor the following media:

■ Fluids of group 2

ATEX DirectiveThe equipment does not have its own potential ignition source and is not subject to this directive.

When installed, static electricity may arise between the equipment and the connected system.

When used in potentially explosive atmospheres, the plant manufacturer or plant operator is responsible for discharging or preventing possible static charge.

If it is possible for medium to escape, e.g. through actuating mechanisms or leaks in threaded joints, the plant manufacturer or plant operator must take this into consideration when dividing the area into zones.

810436-04/09-2017cm (804138-03) · GESTRA AG · Bremen · Printed in Germany


Capacity Chart for BK 46

GESTRA AG Münchener Straße 77, 28215 Bremen, GermanyTelefon +49 421 3503-0, Telefax +49 421 3503-393E-mail [email protected], Web www.gestra.de

Differential pressure

Capa

city

Capa

city


2

1

2

1

DescriptionThermostatic steam trap with corrosion-resistant Thermovit (Duo stainless steel) regulator unaffected by water hammer. The Thermovit regulator can be adjusted from the outside. With integral strainer and non-return valve action. Asbestos-free body gasket (graphite). Installation in any position. The steam trap is adjusted at our factory to discharge condensate with virtually no banking-up. More undercooling (banking-up) can be set manually from the outside during operation.

Pressure and temperature ratings/types of connection

BK 15, flange PN 40, EN 1092-1, butt-weld ends

Pressure 1) p [barg] 40 33, 3 27.6 23.8 13.1

Temperature 1) T [°C] -10/20 200 300 400 450

Max. admissible differential pressure ΔPMX [bar]

[psi]22

3191) Ratings for strength of body/cover to EN 1092-1

BK 15, flange class 300, ASME B16.5, screwed socket, socket-weld ends

Pressure 1) p [barg] 51.1 43.8 39.8 34.7 28.8

Temperature 1) T [°C] -29/38 200 300 400 425

Max. admissible differential pressure ΔPMX [bar]

[psi]22

3191) Ratings for strength of body/cover to ASME B16.5

BK 15, flange class 150, ASME B16.5

Pressure 1) p [barg] 19.6 13.8 10.2 6.5 5.5

Temperature 1) T [°C] -29/38 200 300 400 425

1) Ratings for strength of body/cover to ASME B16.5

Materials EN ASTM

Body 1.0460 A 105

Cover 1.0460 A 105

Bolts 1.7225 A 193 B 7 1)

Nuts 1.7225 A 194 B 7 1)

Body gasket Graphite

Thermovit regulator Stainless steel/Duo stainless steel

Other inner parts Stainless steel

1) Pay attention to differences from EN in chemical and physical properties.

Dimensionsand weights

Versions

EN flangesSocket-weld

endsButt-weld ends

Screwed sockets

Nominal sizes [mm]

[inch]

40 50

1½ 2

40 50

1½ 2

40 50

1½ 2

40 50

1½ 2

Length L 230 230 130 210 250 250 130 210

Butt-weld ends via transition pieces to DIN 3239

48.3 x 2.6 60.3 x 3.2

Weight approx. [kg]] 11 12.5 6.3 7.7 6.8 7.5 6.3 7.7

Steam TrapBK 15PN 40DN 40, 50 DN (11/2", 2")

BK 15 with flanges, DN 40, 50

With socket-weld ends DN 40

With butt-weld ends via transition pieces DN 40, 50

With socket-weld ends DN 50

L

115

DN

140

90

mm

b

L

Types of connectionFlanges: EN 1092-1, form B1, PN 40. ASME B 16.5, 150 RF and 300 RF.Socket-weld endsButt-weld endsScrewed sockets: G and NPT threads

*)

L

L

Data sheet 810708-01Issue: 10/17

∅ g

∅ D

∅ k


CGHJ

Steam TrapBK 15PN 40DN 40, 50 DN (11/2", 2")

Flow diagramThe diagram shows the maximum flowof hot and cold condensate at the factory setting(steam-tight seal).

Curve 1Discharge without banking-up at a condensate temperaturemax. 10 K below boiling point.

Curve 2Condensate temperature 30 K below boiling point(due to banking-up).

Curve 3Flow of cold condensate at 20 °C.

Item Designation Stock code

C Gland seal tubes*) 376552

G Thermovit regulator, set of gaskets 098847

H Strainer, body gasket 375698

J Body gasket *) 92.7 x 102 x 1, graphite 375699

*) Sold in box quantities of 20 per box. For smaller quantities, please contact your specialist retailer.Please note our terms of sale and delivery.

Inspection & CertificationDocumentation regarding material tests and in-house ex-amination with test report EN10204 available. All inspection requirements have to be stated with the enquiry or order. After supply of the equipment certification cannot be established. Charges and extent of the above mentioned test certificates as well as the different tests confirmed therein are listed in our Price List "Test and Inspection Charges for Standard Equipment". For other tests and inspections than those listed above, please consult us.

Application of European DirectivesPressure Equipment DirectiveThe equipment conforms to this directive and can be used for the following fluids:

■ Group 2 fluids

ATEX DirectiveThe equipment does not have its own potential ignition source and is therefore not subject to this directive.

Static electricity: Once installed, static electricity may arise between the equipment and the connected system.

During use in potentially explosive atmospheres, the dis-charge or prevention of possible electrostatic charging is the responsibility of the manufacturer or owner of the system.

If there is a possibility of fluid escaping, e.g. via actuating devices or leaks in screwed connections, the manufacturer or owner of the system must take this into consideration when dividing the area into zones.

3

2

1

Flow diagram

Flow

rate


bar

GESTRA AG Münchener Strasse 77, 28215 Bremen, GermanyTel. +49 421 3503-0, Fax +49 421 3503-393e-mail [email protected], Website www.gestra.com

[kg/h]

Steam Trap BK 27N PN 40 and 63, DN 50 (40) 2" (1½")

DescriptionThermostatic steam trap with corrosion-resistant thermostatic element (Duo stainless steel bimetallic regulator, externally adjustable) unaffected by waterhammer. With internal Y-type strainer, integrated non-return valve and asbestos-free cover gasket (graphite). Installation in any position.The default factory setting allows the steam trap to discharge condensate with virtually no banking-up. For more undercoo-ling the settings of the installed, depressurized steam trap can be modified externally.

Spac

e re

quire

d fo

r ope

ning

trap

10

0 m

m15

7

L

With flanged ends

L

With socket-weld ends

Butt-weld ends to DIN 3239 2-R3, edge form to DIN 2559, code no. 22

d2

d3

125

Materials EN ASTM1)

Body 16Mo3 (1.5415) A 182 F1

Cover 16Mo3 (1.5415) A 182 F1

Bolts 21CrMoV5-7 (1.7709)

Nuts 21CrMoV5-7 (1.7709)

Plug 21CrMoV5-7 (1.7709)

Bimetallic regulator Stainless steel

Other internals Stainless steel

Gasket for plug 1.4301

Gasket for body Graphite / CrNi1) Physical and chemical properties comply with EN grade. ASTM nearest equivalent is stated for guidance only.

Dimensions and weights Flanged to DIN EN PN 40 Flanged to DIN EN PN 63 Flanged to ASME Class 400 RF

Nominal size DN [mm] 40 50 40 50 40 50

Nominal size DN [inch] 1½ 2 1½ 2 1½ 2

Overall length L [mm] 230 230 260 300 241 292

Approx. weight [kg] 14.7 14.7 17.5 18.5 20 21

Dimensions and weights Socket-weld ends Butt-weld ends

Nominal size DN [mm] 40 50 40 50

Nominal size DN [inch] 1½ 2 1½ 2

Overall length L [mm] 180 260 2) 180 180

Approx. weight [kg] 9 9 9 9

2) with buttering ends

1.5

DN d3 d2 for pipe L

40 R3 43 49 48.3 x 2.6 20

50 R3 54 61 60.3 x 3.2 20

30°

Pressure / Temperature Ratings PN 40

Material 16Mo3 (1.5415)

End connection Flanges DIN EN, PN 40

Max. service pressure PMA [bar] 40.0 38.2 30.2 26.7 25.8

Related temperature TMA [°C] 20 200 300 400 450

Max differential pressure (inlet pressure minus outlet pressure) D PMX [bar] 40

FunctionDuring start-up of the plant the Duo stainless steel plates are flat. The service pressure acts in the opening direction, the valve is completely open. As the condensate temperature rises, the plates deflect, drawing the stage nozzle towards the closed position. As the condensate temperature sinks, the deflection of the Duo stainless steel plates decreases and the steam trap opens at the adjusted opening temperature.The thermostatic and spring characteristics of the stack of plates are balanced such that condensate is always dischar-ged at a given undercooling temperature.The trap provides automatic air-venting at start-up and during operation. BK 27N can also be used for thermal air-venting in steam systems.

Technical Data

L

Pressure / Temperature Ratings PN 63

Material 16Mo3 (1.5415)

End connection Flanges DIN EN, PN 63; ASME Class 400 RF

Max. service pressure PMA [bar] 63.0 60.2 47.6 42.0 40.6

Related temperature TMA [°C] 20 200 300 400 450

Max differential pressure (inlet pressure minus outlet pressure) D PMX [bar] 45


818621-00/206cm · © 1979 GESTRA AG · Bremen · Printed in Germany


Steam Trap BK 27N PN 40 and 63, DN 50 (40) 2" (1½")

DesignFor installation in horizontal and vertical pipes.

ConnectionsFlanges: DIN EN 1092-1, Form B1, PN 40 DIN EN 1092-1, Form B2, PN 63 ASME Class 400 RF Socket-weld ends: DIN 3239-R5 / ASME B 16.11 CI 3000 Butt-weld ends: DIN 3239-2-R3Other end connections available on request.

Capacity ChartThe chart shows the maximum capacities for hot and cold condensate discharge at factory setting (steam-tight closure).

Curve 1Discharge of hot water with virtually no bank ing-up.

Curve 2Cold condensate at a temperature of 20 °C.

When ordering please state:Steam pressure, back pressure, quantity of condensate to be discharged, connections, size, position of the trap and details of application.

The following test certificates can be issued on request, at extra cost:In accordance with EN 10204-2.2 and -3.1.

All inspection requirements have to be stated with the order. After supply of the equipment certification cannot be esta-blished. For tests and inspection charges please consult us.

PED (Pressure Equipment Directive)The equipment fulfills the requirements of the Pressure Equipment Directive PED 97/23/EC. For application with fluids of group 2. With CE marking (apart from equipment according to section 3.3).

ATEX (Atmosphère Explosible) The equipment does not have its own potential source of ignition and is therefore not subject to 94/9/EC. The equipment can be used in potentially explosive areas 0, 1, 2, 20, 21 and 22 (1999/92/EC). The equipment is not Ex marked.

Differential pressure [bar] (assuming discharge to atmospheric pressure)

Capa

city

[kg/

h]

3) Note: The regulator of the BK 27N does not fit into the body of the BK 27! 4) 20 pcs. Contact your local dealer for smaller quantities.

A B D E F

Item Designation Stock code no.

D Bimetallic regulator BK 27N3) complete, including gasket F 376607

A Plug G ¼ A 096178

B Gasket for plug (A 14 x 8) 000992

F Gasket4) 92.7 x 102 x 1 376677

E Strainer 097018

1

2


Steam TrapsBK 37 / BK 37-ASME, PN 63/CL 400, DN 15, 20, 25BK 28 / BK 28-ASME, PN 100/CL 600, DN 15, 20, 25BK 29 / BK 29-ASME, PN 160/CL 900, DN 15, 20, 25

DescriptionThermostatic/thermodynamic steam trap with corrosion resistant Thermovit® regulator (bimetallic plates) able to withstand waterhammer. With internal strainer and integral non-return valve action. Asbestos-free body gasket (graphite/CrNi). Installation in any position.The default factory setting enables the steam trap to discharge condensate with virtually no banking-up.

FunctionDuring start-up of the plant the steam trap is completely open. Cold condensate and air are discharged.As the temperature rises, the bimetallic plates deflect, drawing the stage nozzle towards the closed position.Just before the condensate reaches saturated steam temperature the orifice will be shut off tight. The thermodynamic effect of the stage nozzle chamber assists in the closing process.The steam trap provides automatic air-venting at start-up and during operation of the plant. BK 37..., BK 28... and BK 29... can also be used for thermal air-venting.

Temperature/Pressure Ratings & End Connections

BK 37, Flanges PN 63 / 100 EN 1092-1

PMA (admissible service pressure) [bar]g 100 100 94 80.9 73 44.2

TMA (admissible service temperature) [°C] 20 150 265 350 415 500

Δ PMX (admissible differential pressure) [barg] 45Based on EN 1092-1

BK 37, Butt-weld ends to DIN EN 12627, Socket-weld ends to DIN EN 12760

PMA (admissible service pressure) [bar]g 100 100 100 85 61 30.9


Δ PMX (admissible differential pressure) [barg] 45Calculated in accordance with DIN EN 12516-2

BK 28, Flanges PN 100 EN 1092-1

PMA (admissible service pressure) [bar]g 100 100 94 80.9 73 44.2







BK 29, Flanges PN 160 EN 1092-1

PMA (admissible service pressure) [bar]g 160 144 134.8 112 104.3 59.4







– continued overleaf –

BK 37, BK 28, BK 29

BK 37-ASME, BK 28-ASME, BK 29-ASME


BK 37-ASME, Flanges B16.5 Class 400/600, Butt-weld ends to B16.25 Sched. 80, Socket-weld ends to B16.11 Class 3000

PMA (admissible service pressure) [barg] 103.4 100.9 85.7 73.3 67.7 42.8


PMA (admissible service pressure) [psi] 1500 1400 1210 1065 975 745

TMA (admissible service temperature) [°F] 100 300 600 750 850 900

Δ PMX (admissible differential pressure)[barg] 45

[psi] 652


BK 28-ASME, Flanges B16.5 Class 600, Butt-weld ends to B16.25 Sched. 80, Socket-weld ends to B16.11 Class 3000






[psi] 1232


BK 29-ASME, Flanges B16.5 Class 900/1500, Butt-weld ends to B16.25 Sched. 160, Socket-weld ends to B16.11 Class 6000






[psi] 1595


Temperature/Pressure Ratings & End Connections – continued – Design BK 37

1 Cover

3 Thermovit® regulator BK 37, BK 37-ASME

4 Strainer

5 Gasket

6 Body

7 Hexagon nut DIN 2520

8 Stud bolt with reduced shank DIN 2520

9 Name plate


1

5

4

3

6

7

9

7

8

Materials

Type BK 37 BK 37-ASME

Designation DIN / EN ASTM


Stud bolt with reduced shank 1.7709 A193 B7

Hexagon nut 1.7709 A194 Gr.4


Temperature sensor Corrosion resistant Duo S. S.

Nozzle stem and seat Wear-resistant titanium alloy

Other internals Stainless steels



















L

y 110

(4.33")80

(3.1

5")

115

(5.9

1)

92 (3

.622

)

Dimensions Design BK 28-ASME, BK 29-ASME

1 Cover

2 Thermovit® regulator BK 28, BK 28-ASME, BK 29, BK 29-ASME

4 Strainer

5 Gasket

6 Body

7 Hexagon nut

9 Name plate

0 Threaded bolt


1

5

4

2

6

7

9

0

Weights and dimensions for traps with socket-weld endsType DIN EN 12760, ASME B 16.11

BK 37, BK 28, BK 29DN

15 mm 20 mm 25 mm1/2 3/4 1"

BK 37, BK 28, BK 29Class 3000 L [mm] 160 160 160

BK 29Class 6000 L [mm] 200 200 200

BK 37, BK 28, BK 29 [kg] 5.1 5.1 5.1

D = Flange diameter


Type DIN 3239-1DIN 2559-2


BK 37, BK 28, BK 29DN

15 mm 20 mm 25 mm 15 mm 20 mm 25 mm1/2 3/4 1" 1/2 3/4 1"

for pipe 21.3 x 2.0 26.9 x 2.6 33.7 x 2.6 21.3 x 3.73 26.7 x 3.91 33.4 x 3.38

BK 37 L [mm] 160 160 160 160 160 160

BK 28 L [mm] 160 160 160 160 160 160

BK 29 L [mm] 160 160 160 200 200 200

BK 37, BK 28, BK 29 [kg] 5.0 5.0 5.0 5.1 5.1 5.1

Butt-weld ends for other pipe sizes available on request.D = Flange diameter

Weights and dimensions for traps with flanged ends

Type EN 1092-1 PN 63

EN 1092-1 PN 100

DIN 2638 PN 160

BK 37, BK 28, BK 29DN

15 mm 20 mm 25 mm 15 mm 20 mm 25 mm 15 mm 20 mm 25 mm1/2 3/4 1" 1/2 3/4 1" 1/2 3/4 1"

D [mm] 105 130 140 105 130 140 105 140

L [mm] 210 230 230 210 230 230 210 230

[kg] 8 9 10 8 9 10 8 10

D = Flange diameter

Type ASME B 16.5 Class 400/600


ASME B 16.5Class 900/1500

BK 37, BK 28, BK 29DN

15 mm 20 mm 25 mm 15 mm 20 mm 25 mm 15 mm 20 mm 25 mm1/2 3/4 1" 1/2 3/4 1" 1/2 3/4 1"

D [mm] 95 115 125 95 115 125 120 130 150

L [mm] 230 230 230 230 230 230 230 230 254

[kg] 7 9 9 7 9 9 10 11 14

D = Flange diameter

Steam trapsBK 37 / BK 37-ASMEBK 28 / BK 28-ASME BK 29 / BK 29-ASME



Capacity ChartThe chart shows the capacities for hot and cold condensate.

Curve 1

This curve indicates the max. capacity of hot condensate that the steam trap BK 37 can discharge with virtually no banking up.

Curve 2

This curve indicates the max. capacity of hot condensate that the steam traps BK 28 and BK 29 can discharge with virtually no banking up.

Curve 3

This curve indicates the max. capacity of cold condensate (20 °C) that the steam traps BK 37, BK 28 and BK 29 can discharge.

When ordering please state:Material, material of screws/bolts, steam pressure & tem-perature, back pressure, condensate flowrate, design, end connections, nominal size, details of application or type of steam consumer.The following test certificates can be issued on request, at extra cost:In accordance with EN 10204-2.2, 3.1 and 3.2.All inspection requirements have to be stated with the en-quiry/order. After supply of the equipment certification cannot be established. Charges and extent of the above mentioned certificates as well as the different tests confirmed therein are listed in our price list "Test and Inspection Charges for Standard Equipment". For other tests and inspections please consult us.

PED (Pressure Equipment Directive)The equipment fulfils the requirements of the Pressure Equip-ment Directive PED 97/23/EC.For use with fluids of group 2.The equipment is excluded from the scope of the PED accord-ing to Article 3.3 and must not bear a CE marking.

ATEX (Atmosphère Explosible)The equipment does not have ist own potential source of ignition and is therefore not subject to the ATEX Directive 94/9/EC. Applicable in Ex zones 0, 1, 2, 20, 21, 22 (1999/92/EC). The equipment does not bear an Ex marking.

Capacity Chart

Spare Parts3/4

5

6

Item Designation Stock code

3, 6Spare part kit for BK 28 and BK 28 ASME, cpl. with gasket 379825

Spare part kit for BK 29 and BK 29 ASME, cpl. with gasket 379826

4, 6 Spare part kit for BK 37 and BK 37 ASME, cpl. with gasket 377722

5 Strainer 096701

6Gasket for BK 28 and BK 28 ASMEGasket for BK 37 and BK 37 ASME 086519

Gasket for BK 29 and BK 29 ASME 372095

[kg/h][lb/h]

1000

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50006000

8000

10000

15000

600

800

400

500

300

200100

4000

50006000

3000

2000

1000

7000

600

800

400

500

300

200

20001000600 800400

20

300

10

100

100110 1506

60

60 808

80

304 40 45

200

[bar]

[psi]

DifferenzdruckDifferential pressure

Cap

acity

Dur

chflu

ss

3

2

1


Documents

Description Function Pressure & temperature ratings