DFT® Inc
DFT® Inc
140 Sheree Blvd. PO Box 566
Exton, PA 19341-0566
Phone: 800.206.4013
Fax: 847.540.1422
Email: dft@dft-valves.com
Website: www.dft-valves.com
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The DFT® Restrictor Check Valve (RCV) is a versatile, all-purpose, spring-assisted, in-line check valve for applications that require higher cracking pressures to open the check valve than those offered by other DFT® check valves. Cracking pressures are available from 2 to 40 psi. Like the Basic-Check® valve, the Restrictor Check provides reliable, low maintenance service for a wide range of fluids and gases at various pressure/temperature combinations. The valve consists of a guard cage,more
Unit of Measure

Specifications

Series

 Restrictor Check

Outside Thread (MNPT) B

 1.00 in

Friction Loss (Feet of Pipe)

 7

Friction Loss (Meter of Pipe)

 2.1

Valve Cracking Pressure

 8.1 psi0.558 bar

Cold Working Pressure

 0 psig2500 psig

Valve Cracking Pressure Tolerance

 ±10%

Approx. Net Weight Each

 0.38 lb

ENDS

 NPT (Threaded)

Materials of Construction

Seat

 303 SS

Disc

 316 SS

Guard

 303 SS

Spring

 302 SS

Retaining Ring

 316 SS

Available Soft Seat Materials

Available Soft Seat Materials1 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

ANSI

 B1.20.1

MSS

 SP-25
ASTM2 303 SS not acceptable for CRN

Features

N/A

  • Higher cracking pressures (2 to 40 psi)
  • 1/4" to 2 1/2" Line size
  • 450 to 2500 CWP
  • Threaded ends
  • Stainless Steel Construction
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Tight shut-off - lapped disc & seat
  • Easy maintenance
  • Versatile

Options

N/A

  • Soft seat

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 Generator Inlet & Discharge Hydraulic Lines Metering Pumps Mine Dewatering Nitrogen Purge Process Lines Pump Discharge Refrigeration Steam Lines Vacuum Breaker Water Lines Water Treatment

Inventory

Inventory
  • 1 Buna-N and Viton are not suitable for steam service.
  • 2 CRN: Contact DFT for acceptable materials.