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Home > DFT Inc. > Check Valves > Threaded Check Valves > Basic Check > High Pressure 17-755 Disc BSSH7

Prod. # 8025, 1 1/4" 316 SS BSSH7 Style Basic-Check® Threaded In-Line Check Valve

  	 Prod. # 8025, 1 1/4" 316 SS BSSH7 Style Basic-Check® Threaded In-Line Check Valve
Prod. # 8025, 1 1/4' 316 SS BSSH7 Style Basic-Check® Threaded In-Line Check Valve
DFT Inc.

The DFT® Basic-Check valve is a versatile all-purpose, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of liquids and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as reducing couplings, drain elbows, etc. to form a complete check valve unit ideally suited for a broad range of pipeline applications or incorporated into machinery for OEM applications. The metal-to-metal sealing area of the Basic-Check valve’s disc and seat is precision lapped, providing very tight shut-off of both gas and liquid. If bubble-tight shut-off is required, resilient soft seats are available.




Specifications  · Materials of Construction  · Soft Seat Materials  · Springs  · Valve Selection Specifications  · Codes and Standards  · Features  · Options

Specifications

Series

Basic-Check®

Size

DN 32
1.25 in

Line Size Inlet (FNPT) A

1.25 in

Style

BSSH7

Outside Thread (MNPT) B

2.50 in

Cv

36

Friction Loss (Feet of Pipe)

12.5

Friction Loss (Meter of Pipe)

3.8

Valve Cracking Pressure1

0.16 psi
0.011 bar
4.5 in.water
114 mm.water
8.4 mmHg

Valve Cracking Pressure Tolerance

±10%

Approx. Net Weight Each

2.25 lb
1 kg

Cold Working Pressure2

0 psig
4000 psig
0 barg
276 barg
1 Cracking pressure for vertical flow will be slightly different: upward flow, slightly higher; downward flow, slightly less.
Not recommended for use on discharge of reciprocating compressors.
2 Contingent on service ratings of matching pipe and fittings.


Materials of Construction

Seat

316 SS

Disc

17-7 SS

Guard

CF8M

Spring

316 SS

Retaining Ring

316 SS


Soft Seat Materials

Soft Seat Materials1

Buna-N -49 (-70 to 250°F)
EPDM -57 (-75 to 300°F)
TFE®-Viton -98 (-40 to 400°F)
Viton® -51 (-40 to 400°F)
Zelon® -54 (37 to 400°F)
1 Soft seats are not available for the Style BSE check Valve. Buna-N and Viton are not suitable for steam service.


Springs

Springs

Inconel® X-750 (-460 to 700°F)
316 SS (-460 to 450°F)


Valve Selection Specifications

ENDS

NPT

ASME

4000 CWP

Materials

316 SS


Codes and Standards

ANSI

B1.20.1

MSS

SP-25


Features
  • 1/4" to 2 1/2" Line size
  • 450 to 6000 CWP
  • Threaded ends
  • Stainless Steel Construction
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Tight shut-off - lapped disc & seat
  • Easy Maintenance
  • Versatile


Options
  • Inconel® 750 Spring
  • Soft seat



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