Prod. # 8020, 1/4″ 316 SS BSSH7 Style Basic-Check® Threaded In-Line Check Valve

Description





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.

Light spring available: Cracking Pressure = 0.24 PSI (6.5 inches of water)


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


Specifications

Series


Basic-Check®

Size


DN 8
0.25 in

Line Size Inlet (FNPT) A


0.25 in

Style


BSSH7

Outside Thread (MNPT) B


1.00 in

Cv


5.8

Friction Loss (Feet of Pipe)


7

Friction Loss (Meter of Pipe)


2.1

Valve Cracking Pressure1


0.60 psi
0.041 bar
16.7 in.water
424 mm.water
31.1 mmHg

Valve Cracking Pressure Tolerance


±10%

Approx. Net Weight Each


0.38 lb
0.2 kg

Cold Working Pressure2


0 psig
6000 psig
0 barg
414 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


6000 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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Prod. # 8020, 1/4″ 316 SS BSSH7 Style Basic-Check® Threaded In-Line Check Valve

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