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Find My Check Valve
The FBC® Check Valve is a compact, lightweight, insert wafer check valve that easily installs between two flanges. The non-slam, spring-assisted design prevents "water hammer" and "reverse flow". The FBC® Check Valve contains all the proven features of the Basic-Check® valve developed originally by DFT® and still in use after 70 years. Like the Basic-Check® Valve, the metal-to-metal sealing area of the disc and seat is precision lapped, providing tight shutoff for applications involving liquids, gases, or steam. Resilient soft seats are available for applications requiring bubble-tight shutoff.
Unit of Measure

Inventory

Inventory

Specifications

Series

 FBC®

Size

 1.50 inDN 40

Cold Working Pressure

 275 psig720 psig18.98 barg49.68 barg

ASME CLASS

 150 300

Dimension A

 1.099 in28 mm

Dimension B

 0.25 in6 mm

Dimension C

 1.56 in39.624 mm

ANSI

 B16.34

O.D.

 2.88 in73.152 mm

Weight

 0.6 lb0.3 kg
Temperature Rating1
37 to 450 ºF2.78 to 232.22 ºC

Cracking Pressure CP

 0.45 psig0.031 bar

Cv

 13.2

ENDS

 Wafer (RF)

Materials of Construction

Seat

 316 SS/EPDM

Disc

 316 SS

Guard

 316 SS

Spring

 316 SS

Retaining Ring

 BUNA-N EPDM TFE®-Encapsulated Viton® Viton® Zelon®

Available Soft Seat Materials

Available Soft Seat Materials2 Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF)

Codes and Standards

MSS

 SP-126, SP-61, SP-6

Application

N/A Autoclaves Boiler Feed & Discharge Chemical Lines Compressor Discharge Condensate Lines Cookers Cooling Towers Crude & Refined Product Lines Cryogenics Digester Evaporators Fly Ash System Gases Generator Inlet & Discharge Hydraulic Lines Liquids Metering Pumps Mine Dewatering Nitrogen Purge Process Lines Pump Discharge Refrigeration Steam Steam Lines Vacuum Breaker Water Lines Water Treatment

Features

N/A

  • Spring-assisted silent closing
  • Horizontal or vertical installations
  • Sizes 1" thru 4"
  • ASME/ANSI Class 150 and 300
  • Stainless steel seat, disc, guard, retaining ring & spring
  • Cracking pressure: 0.6 to 0.15 psi
  • Temperatures to 450°F
  • Use in Schedule 40 pipe
  • Meets ASME B16.34-2004 & MSS SP-126
  • Flange Finish per MSS SP-6
  • Seat Leakage per MSS SP-61

Options

N/A

  • Soft-seat
  • Inconel® X-750 Spring
  • 1 Pressure/Temperature ratings in accordance with ASME/ANSI B16.34
  • 2 Buna-N and Viton are not suitable for steam service