Threaded In-Line Check Valves

The DFT® Model SCV® Check Valve is a corrosion-resistant, dependable, versatile and economical spring-assisted, non-slam check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the SCV® provides tight shutoff and protects other equipment in the system from water hammer. Its stainless steel construction assures a long service life.

Standard Features:

1/2" to 3" Line Size
750 & 3600 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

750 CWP is rated to 470ºF.
3600 CWP is rated to 400ºF.
Buna-N CO₂ resistant "O" ring is available upon request.

Unit of Measure

Items	835C7B4A5 750 CWP/500 WSP 1/2" NPT 316SS SCV® Threaded In-Line Check Valve List Price {QUOTE}	835D7B4A5 750 CWP/500 WSP 3/4" NPT 316SS SCV® Threaded In-Line Check Valve List Price {QUOTE}	835E7B4A5 750 CWP/500 WSP 1" NPT 316SS SCV® Threaded In-Line Check Valve List Price {QUOTE}	835F7B4A5 750 CWP/500 WSP 1 1/4" NPT 316SS SCV® Threaded In-Line Check Valve List Price {QUOTE}	835G7B4A5 750 CWP/500 WSP 1 1/2" NPT 316SS SCV® Threaded In-Line Check Valve List Price {QUOTE}
OLD PART #	N/A 8317	N/A 8368	N/A 8369	N/A 8371	N/A 8373
Series	N/A SCV®
Size	N/A 0.50 in	N/A 0.75 in	N/A 1.00 in	N/A 1.25 in	N/A 1.50 in
ASME CLASS	N/A 300
Cold Working Pressure	N/A 750 psig
Working Steam Pressure	N/A 510 psig
Dimension A	N/A 2.68 in	N/A 3.00 in	N/A 3.32 in	N/A 3.85 in	N/A 4.75 in
Dimension B	N/A 1.62 in	N/A 2.33 in	N/A 2.54 in	N/A 3.06 in	N/A 3.44 in
Weight	N/A 1.1 lb	N/A 1.5 lb	N/A 1.9 lb	N/A 3.9 lb	N/A 4.7 lb
Cracking Pressure CP	N/A 0.29 psig0.02 bar	N/A 0.24 psig0.017 bar	N/A 0.36 psig0.025 bar	N/A 0.28 psig0.019 bar	N/A 0.24 psig0.017 bar
Body	N/A A351 CF8M
Body Material	N/A 316 Stainless Steel
Trim	N/A 316 SS
Seat¹	N/A A351 CF8M
Disc	N/A 316 SS
Spring	N/A Inconel® X-750
Body Seal	N/A Zelon® (470 ºF max.)
Available Soft Seat Materials	N/A Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF)
Temperature Rating²	N/A 37 to 470 ºF2.78 to 243.33 ºC
B (Dia.)	N/A 1.62 in	N/A 2.33 in	N/A 2.54 in	N/A 3.06 in	N/A 3.44 in
ENDS³	N/A NPT (Threaded)
ANSI	N/A B1.1 B1.20.1 B16.11 B16.25 B16.34
MSS	N/A SP-126 SP-25 SP-61
ASTM⁴	N/A A351GR CF8M
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) Socket weld ends SCV-R restrictor check (higher cracking pressure) Butt weld ends NACE Light cracking pressure springs
ASME CWP	N/A 750
Cv	N/A 7	N/A 13	N/A 22	N/A 39	N/A 54
Other	N/A API PED
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
Repair Kit Available	N/A	N/A 8368-RK, Repair Kits ({QUOTE})	N/A 8369-RK, Repair Kits ({QUOTE})	N/A 8371-RK, Repair Kits ({QUOTE})	N/A 8373-RK, Repair Kits ({QUOTE})
Valve Type	N/A Check Valve
¹ Soft seats are available for bubble-tight shutoff. Body seal and soft seat material are the same unless otherwise requested. ² ASME B16.34 ³ NPT x SW available. ⁴ Contact DFT for NACE.