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

Description

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.

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    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

    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