YARWAY REPAIRABLE DRIP AND TRACER STEAM TRAPS SERIES 751/761

YARWAY REPAIRABLE DRIP AND TRACER STEAM TRAPS SERIES 751/761

Thermostatic steam traps that provide consistent performance in less than perfect conditions.

FEATURES

Thermostatic Traps ? Repairable ? Pressure assisted fail-open design ? Freeze proof ? Energy efficient subcooled discharge ? Hardened stainless steel valve body and seat ? Installation in any position ? Withstand superheat ? Operates against 99% back pressure ? Self draining (vertical mount) ? Easy to check ? Multiple subcool options ? Integral strainer option

751

761

GENERAL APPLICATION

The series 751/761 Unibody Plus bellows trap is designed for light load applications such as steam tracing, drip, and light process.

TECHNICAL DATA

Technology: Size:

Connections: Materials:

Thermostatic ", ?", ?", 1" (DN 10, 15, 19, 25) Threaded, Socket Weld low carbon (0.15% max.) chrome moly body and stainless steel trim

751/761 -5 & -40 Design: Operating: Max Temperature: Capacity: Back Pressure:

ANSI Class 600 1-300 psi (0.07 - 21 bar) 750?F (400?C) up to 675 lb/hr (306 kg/hr) 99%

751/761 -HP Design: Operating Pressure: Max Temperature: Capacity: Back Pressure:

ANSI Class 600

1-600 psi (0.07 - 41 bar) 750?F (400?C) up to 900 lb/hr (409 kg/hr) 99%



? 2020 Emerson. All Rights Reserved.

VCTDS-15699-EN 20/09

STESAtMeaTRmATPrFaLpOFlWoRwATRE,atKe,G/kHg/Rhr

YARWAY REPAIRABLE DRIP AND TRACER STEAM TRAPS SERIES 751/761

SERIES 751/761 THERMOSTATIC TRAPS (BELLOWS)

The series 751/761 is available in two body designs and with three Filled Thermal Elements (FTEs). The series 761 is an in-line body with an integral wye strainer and blowdown valve. The series 751 is an in-line body only. The FTEs to 300 psi are the -5 for drip tracing and light process; the -40 for tracing. The -HP is for applications to 600 psi. The FTEs are available in factory set and assembled renewal kits.

All internals are energy efficient. The -5 and -HP internals are slightly subcooled operating near steam temperature. The -40 internals operate 35?F to 45?F subcooled. The -HP is recommended for optimum service life limited to 450 psig.

Applicable codes and standards Pressure ratings per ANSI/FCI-69-1 Performance testing per ANSI/ASME PTC-39.1 End connections per ANSI B1.20.1 for threaded ends, per ANSI B16.11 for socket-welding ends.

CAPACITIES (FOR STEAM TRAP SIZING)

STEASMteTaRmAPTDrIaFpFEInRlEeNt TPIrAeLsPsRuEreS,SbUaRrE, bar

0.1 4000

0.2 0.3 0.5

1

23

5

10

20 30

STSEtAeaM TmRTArPapFLFlOoWwRARTatE,e,LlBb//HhRr

3000 2000

HP 1000

700

1000 800 700 600 500 400

300

500

300

CCOoLlDd

200

HoHt OT

200

100 80 70 1

751-5, 761-5 751-40, 761-40

100 70 751-HP, 50 761-HP

2 3 4 5 6 7 8 10

20 30 40 50 60 80 100 200 300 400 600

STEAMStTeRaAmPTDrIaFpFEInRlEeNtTPIAreLsPsRuErSeS, UpRsiE, PSI

FUNCTIONAL SUPERHEAT DESIGN LIMITS

OPERATING PRESSURE, bar 3.4 6.8 10.3 13.7 17.2 20.6 24.1 27.5 31.0 34.4 37.9 41.4

OPERATING TEMPERATURE, ?F

900

482

HOW TO SPECIFY AND ORDER

Typical specification - traps shall be

800

HP internals 5 Internals

426

thermostatic rated to 600 psi and actuated by

40 internals

a FTE stainless steel. The body shall be low

700

371

carbon (0.15 max c) chrome-moly steel with

threaded (socket-welding) end connections.

600

315

Trap shall be in-line repairable energy efficient thermostatic valve. Specify end connections to be threaded or socket-welded. Trap shall have replaceable capsule.

Ordering - specify trap pipe size, series number, FTE rating, and the type of end connections desired (threaded or socketwelding). The renewal capsule consists of a factory-calibrated FTE cage assembly, seat and bonnet, with seat gasket. Order by specifying: Renewal capsule for series 751/761 trap.

500

260

400

Saturation curve

204

300

149

200 0

93.3 50 100 150 200 250 300 350 400 450 500 550 600

OPERATING PRESSURE, PSIG

HOW TO SIZE

1. Determine maximum temperature and pressure of application and verify with trap. 2. Determine operating conditions Temperature, Inlet Pressure, Outlet Pressure, and Condensate Load (including factor of safety). 3. Determine the condensate load at the operating differential pressure is below what trap can handle. 4. Verify trap can handle back pressures

PRESSURE/TEMPERATURE RATINGS

Shell rating Max. design Temperature Max. operating Pressure Min. operating Pressure Operating temperature

751/761-5, -40 600 psi

750?F (400?C) 300 psi (21 bar) 1 psi (0.07 bar)

See chart

751/761-HP 600 psi

750?F (400?C) 600 psi (41 bar) 1 psi (0.07 bar)

OPERATING TEMPERATURE, ?C

2

YARWAY REPAIRABLE DRIP AND TRACER STEAM TRAPS SERIES 751/761

SERIES 751/761 THERMOSTATIC TRAPS (BELLOWS)

SERIES 751 3

B HEX

SERIES 761 A

B HEX

4

D Min. to

5

assemble

C 2

1

3 K thread size

4

D Min. to

assemble

5

C 2

1

6 7

13

14

Assembly with plugged strainer cap

Flow

K thread size A

GH

Socketweld end connections

Flow

6

7 8 9 10 11 12

PARTS AND MATERIALS

Item Part

1

Body

2[1]

Seat gasket

3[1]

Nameplate

4[1]

FTE cage assembly

5[1]

Bonnet

6

Screen

7[2]

Cap gasket

8[2]

Blowdown seat

9[2]

Retaining ring

10[2] Blowdown body

11[2] O-ring

12[2] Blowdown valve

13[3] Strainer cap

14[3] Plug NPT

15[3] Blank strainer cap

Materials ASME SA-182 GR. F11 low carbon, 0.15 max C Clad non-asbestos Stainless steel Stainless steel Stainless steel Stainless steel Monel? Stainless steel Stainless steel Stainless steel Silicone Stainless steel Stainless steel Carbon steel Stainless steel

E F Min. to

disassemble

J HEX

6 7

15 Assembly with blank

strainer cap

NOTES 1. Part of factory assembled assembled renewal capsule. 2. Factory assembled blowdown valve renewal kit. 3. Optional strainer caps.

DIMENSIONS AND WEIGHTS

Trap size in. (DN) (10) ? (15) ? (20) 1 (25)

A 35/32 (80) 35/32 (80) 335/64 (90) 315/16 (100)

B 1? (38) 1? (38) 1? (38) 1? (38)

C 23/16 (56) 23/16 (56) 2? (57) 2? (57)

Nominal dimensions, in. (mm)

D

E

F

G

3 (76) 2 (73) 315/16(100) (9.5)

3 (76) 2 (73) 315/16(100) (9.5)

31/16 (78) 3? (83) 415/16 (110) ? (12.7)

31/16 (78) 3 (86) 47/16 (113) ? (12.7)

H 0.695 (17.6) 0.860 (21.8) 1.070 (27.2) 1.335 (33.9)

J 11/16 (27) 11/16 (27) 13/16 (30) 13/16 (30)

K NPT ? NPT ? NPT 1 NPT

Weight lb. (kg)

Series 751

Series 761

2 (0.9)

2? (1.3)

2 (0.9)

2? (1.3)

2? (1.2)

3? (1.5)

2? (1.3)

4 (1.8)

3

VCTDS-15699 ? 2020 Emerson Electric Co. All rights reserved 09/20. Yarway is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

Emerson Electric Co. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Electric Co. product remains solely with the purchaser.



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