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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 4.00 inDN 100

Cold Working Pressure

 N/A 275 psig18.975 barg

Working Steam Pressure

 N/A 225 psig

ASME CLASS

 N/A 150

Dimension A

 N/A 2.105 in53 mm

Dimension B

 N/A 0.375 in10 mm

Dimension C

 N/A 3.70 in93.98 mm

ANSI

 N/A B16.34

O.D.

 N/A 6.19 in157.226 mm

Weight

 N/A 5.2 lb2.4 kg
Temperature Rating1
N/A -70 to 250 ºF-56.67 to 121.11 ºC

Cracking Pressure CP

 N/A 0.15 psig0.01 bar

Cv

 N/A 90

ENDS

 N/A Wafer (RF)

Materials of Construction

Seat

 N/A 316 SS/Buna

Disc

 N/A 17-7 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