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

N/A {0}

Specifications

Series

N/A FBC®

Size

N/A 1.00 inDN 25

Cold Working Pressure

N/A 275 psig720 psig18.98 barg49.68 barg

ASME CLASS

N/A 150 300

Dimension A

N/A 0.868 in22 mm

Dimension B

N/A 0.25 in6 mm

Dimension C

N/A 1.03 in26.162 mm

ANSI

N/A B16.34

O.D.

N/A 2 in50.8 mm

Weight

N/A 0.2 lb0.1 kg
Temperature Rating1
N/A -75 to 300 ºF-59.44 to 148.89 ºC

Cracking Pressure CP

N/A 0.60 psig0.041 bar

Cv

N/A 5.8

ENDS

N/A Wafer (RF)

Materials of Construction

Seat

N/A 316 SS EPDM

Disc

N/A 316 SS

Guard

N/A 316 SS

Spring

N/A 316 SS

Retaining Ring

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

Available Soft Seat Materials

Available Soft Seat Materials2 N/A 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

N/A 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