Find My Check Valve
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, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as couplings, drain elbows, etc. (not provided by DFT®) to form a complete check valve unit ideally suited for a broad range of applications. The RCV should not be considered a substitute for a Pressure Relief Valve.
Unit of Measure
Items
Restrictor Threaded In-Line Check Valves

1/4" 10.9 psig Restrictor Threaded In-Line Check Valve

Restrictor Threaded In-Line Check Valves

1/8" 20.4 psig Restrictor Threaded In-Line Check Valve

Restrictor Threaded In-Line Check Valves

1/4" 8.1 psig Restrictor Threaded In-Line Check Valve

Restrictor Threaded In-Line Check Valves

1/4" 3.3 psig Restrictor Threaded In-Line Check Valve

Restrictor Threaded In-Line Check Valves

1/4" 5.3 psig Restrictor Threaded In-Line Check Valve
Series N/A Restrictor Check
Size N/A 0.25 inDN 8
Line Size Inlet (FNPT) A N/A 0.25 in
Outside Thread (MNPT) B N/A 1.00 in
Friction Loss (Feet of Pipe) N/A 7
Friction Loss (Meter of Pipe) N/A 2.1
Valve Cracking Pressure1
N/A 0.752 bar10.9 psi N/A 1.407 bar20.4 psi N/A 0.558 bar8.1 psi N/A 0.228 bar3.3 psi N/A 0.365 bar5.3 psi
Valve Cracking Pressure Tolerance N/A ±10%
Approx. Net Weight Each N/A 0.38 lb0.2 kg
Cold Working Pressure N/A 0 psig2500 psig0 barg172 barg
Seat N/A 303 SS
Disc N/A 316 SS
Guard N/A 303 SS
Spring N/A 302 SS
Retaining Ring N/A 316 SS
Available Soft Seat Materials2 N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 470°F) N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 470°F) N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 470°F) N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 400°F) N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 470°F)
ENDS N/A NPT
ANSI N/A B1.20.1
MSS N/A SP-25
ASTM3 N/A 303 SS not acceptable for CRN
Applications 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
  • 1 Contingent on service ratings of matching pipe and fittings.
  • 2 Buna-N and Viton are not suitable for steam service.
  • 3 CRN: Contact DFT for acceptable materials.