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Home > DFT Inc. > Check Valves > Threaded Check Valves > SCV > Alloy 20 Class 300

Prod. # 8373A20, 750 CWP/500 WSP 1 1/2" NPT Alloy 20 SCV® Threaded In-Line Check Valve

	 Prod. # 8373A20, 750 CWP/500 WSP 1 1/2" NPT Alloy 20 SCV® Threaded In-Line Check Valve
Prod. # 8373A20, 750 CWP/500 WSP 1 1/2' NPT Alloy 20 SCV® Threaded In-Line Check Valve
DFT Inc.

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

750CWP is rated to 470°F.





Specifications  · Materials of Construction  · Body "O" Ring/Soft Seat Materials  · Springs  · Valve Selection Specifications  · Codes and Standards  · Features  · Options

Specifications

Series

SCV®

Size

DN 40
1.5 in

Cold Working Pressure

0 to 750 psig
0 to 51.7 barg

Working Steam Pressure

500 psig

Dimension A

4.75 in
121 mm

Dimension B

3.44 in
87 mm

Weight

4.7 lb
2.1 kg

Cv

54

Cracking Pressure CP

0.24 psig
0.017 bar

End Connection

NPT

Temperature Rating1

37 to 470 ºF
3 to 243 ºC
1 ASME B16.34-2004


Materials of Construction

Body

A351 CN7M

Body Material

Alloy 20

Seat1

A351 CN7M

Disc

Alloy 20

Spring

Hastelloy C276

Body Seal

Zelon (470°F max.)
1 Soft seats are available for bubble-tight shutoff. Body seal and soft seat material are the same unless otherwise requested.


Body "O" Ring/Soft Seat Materials

Body "O" Ring/Soft Seat Materials

Seal Weld (-425 to 700°F)
TFE® -Viton (-40 to 400°F)
Zelon® (37 to 470°F)
Buna-N (-70 to 250°F)
EPDM (-75 to 300°F)
Viton (-40 to 400°F)


Springs

Springs

Hastelloy C276


Valve Selection Specifications

ENDS1

SWE Available

ASME

750 CWP
3600 CWP

Materials

316 SS/316 SS - Standard
Alloy 20 - Optional
Hastelloy® C - Optional
1 NPT x SW available.


Codes and Standards

ANSI

B1.1
B1.20.1
B16.34

MSS

SP-126
SP-25
SP-61

ASTM1

A351GR CF8M
1 Contact DFT for NACE.


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® body "O" ring
  • Horizontal or vertical installation
  • Body guided disc
  • Tight shut-off - lapped disc & seat
  • Simplified construction - 5 parts
  • Easy maintenance
  • Versatile


Options
  • 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
  • API 6D
  • Light cracking pressure springs



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