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
·
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

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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Product Literature

Cut Sheet (SCV® Threaded In-Line Check Valves) (PDF)
Water Hammer (PDF)
Features (PDF)
Pressure Temperature Rating (PDF)
Applications (PDF)
Technical Information (PDF)

Additional Literature

NACE (PDF)
Zelon Technical Information (PDF)
Canadian Registration Numbers (PDF)
Check Valves: Key Considerations to Make When Designing Fluid or Gas Flow Systems (PDF)

Request Information

Non-Slam Check Valve RFQ