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The SCV-R® Check Valve is a non-slam Spring-assisted check valve designed for applications requiring "higher cracking pressures" than the DFT Model SCV® check valve. The SCV-R® check valve is a self-contained check valve that installs directly in a pipeline and contains all the proven features of the SCV® check valve.

Standard Features:
  • 750 CWP
  • NPT & SW Ends
  • Stainless Steel Construction
  • Inconel® X-750 Spring
  • Spring-Assisted Silent Closing, Non-Slam
  • Zelon® "O" Ring Body Seal
  • Horizontal or Vertical Installation
  • Body Guided Disc
  • Tight Shutoff Lapped Disc & Seat
  • Easy Maintenance
Notes:
  • 3" is not Available
  • Contact DFT® for Other Cracking Pressures.
  • 750CWP is Rated to 470ºF.
Unit of Measure

OLD NPT #

OLD PART #

 N/A 8373-RC139

Inventory

Inventory

 N/A {0}

Specifications

Series

 N/A SCV-R®

Size

 N/A 1.50 inDN 40

Cold Working Pressure

 N/A 750 psig51.7 barg

Working Steam Pressure

 N/A 510 psig

Dimension A

 N/A 4.75 in121 mm

B (Dia.)

 N/A 3.44 in87 mm

Weight

 N/A 4.7 lb2.1 kg

Cracking Pressure CP

 N/A 13.9 psig0.959 bar

Cracking Pressure CP Tolerance

 N/A ±10%

Temperature Rating

 N/A 37 to 470 ºF2.78 to 243.33 ºC

Body Seal

 N/A Zelon® O-ring

ENDS

 N/A NPT (Threaded)

Cv

 N/A 36

Available Soft Seat Materials

 N/A TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF)

Materials of Construction

Body Material

 N/A 316 Stainless Steel
Body1 N/A A351 CF8M
Seat2 N/A 316 SS

Disc

 N/A 316 SS

Spring

 N/A Inconel® X-750

Spring Retainer Assembly

 N/A 316 SS

"O" Ring

 N/A Zelon (470°F max.)

Codes and Standards

ASTM

 N/A A351GR CF8M

ANSI

 N/A B1.1 B1.20.1 B16.11 B16.25 B16.34

MSS

 N/A SP126 SP-25 SP61

Features

N/A

  • 1/2" to 2" Line size
  • 750 CWP
  • NPT & SW ends
  • Stainless Steel Construction
  • Inconel® X-750 spring
  • Spring-assisted silent closing, non-slam
  • Cracking Pressures: 0.8 to 40.8 psig
  • Zelon® body "O" ring
  • Horizontal or vertical installation
  • Body guided disc
  • Tight shut-off - lapped disc & seat
  • Simplified construction - 5 parts
  • Easy maintenance
  • Versatile
  • Inconel® X-750 spring is standard

Options

N/A

  • 316 SS Springs
  • Body seal weld (700°F Maximum)
  • Soft seat
  • Alloy 20 body & seat (ASME 300)
  • Hastelloy C body & seat (ASME 300)
  • NPT x socket weld ends
  • Butt weld ends
  • Repair kits
  • Field conversion kits

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

  • 1 A351 CF8M is the casting equivalent of 316 SS.
  • 2 Soft seats are available for bubble tight shutoff. Body seal and soft seat material are the same unless otherwise requested.