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The DSV® is an in-line spring-assisted check valve designed to prevent flow reversal in industries with strict cleanliness codes. To accommodate various piping arrangements, the DSV® is available as a "Vertical" or "Horizontal" valve. The Horizontal valve is for Horizontal lines requiring a self-draining valve. The "Vertical" design is for "Vertical" installations and "Horizontal" lines when a self-draining valve is not required. The DSV®, with a 316L stainless steel body and seat, is fastened with a quick release clamp and elastomeric body seal to permit fast and easy access to the internals. The disc and seat are lapped to provide excellent shutoff.
Unit of Measure

OLD NPT #

OLD PART #

 N/A 2102

Specifications

Series

 N/A DSV®

ASME CLASS

 N/A 108

Style

 N/A Vertical

Size

 N/A 0.50 inDN 15

Cold Working Pressure

 N/A 0 psig150 psig0 barg10.3 barg

Dimension A

 N/A 2.50 in64 mm

Dimension B

 N/A 0.98 in24.89 mm

Dimension D

 N/A 0.98 in25 mm

Weight

 N/A 1.4 lb0.6 kg

Flow Down Cracking Pressure CP

 N/A 0.26 psig0.018 barg

Flow Up Cracking Pressure CP

 N/A 0.33 psig0.023 barg

Horizontal Cracking Pressure CP

 N/A 0.02 bar0.29 psig

Temperature Rating

 N/A 149 ºC (with standard EPDM seal)

ENDS

 N/A Clamped

Cv

 N/A 2.4

Valve Selection Chart

ASME CWP1 N/A 150

Materials of Construction

Body

 N/A 316L SS

Seat

 N/A 316L SS

Disc

 N/A 316 SS

Spring

 N/A 316 SS (Electropolished)

Guide Assembly

 N/A 316 SS
Body Seal2 N/A EPDM (-75 to 300°F)

Clamp

 N/A 304 SS

Internal Surface Finish

 N/A 32 Ra - Standard

Body Material

 N/A Stainless Steel

Codes and Standards

ANSI

 N/A B16.34

Features

N/A

  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Sizes 1/2" thru 3"
  • 150 CWP, 108 ANSI Pressure Class
  • 316L body and seat
  • 316 disc, spring and guide assembly
  • 32 Ra Internal Surface Finish
  • Edge guided disc: 1/2" thru 2"
  • Edge/center guided disc: 2 1/2", 3"
  • Lapped "metal" seat and disc
  • Springs:
    - Low cracking pressures
    - 0.16 psig to 0.66 psig
    - Conical design
    - Electro polished finish
  • Body Seal: EPDM (standard)
  • CIP (Clean in Place)
  • Clamped ends
  • Seat Leakage per MSS SP-61

Options

N/A

  • 15 Ra Electropolished Internal Finish
  • Body Seals
    - Tuf-Flex
    - Viton

Options

 N/A 15 Ra Internal Finish Tuf-Flex (Body Seals) Viton (Body Seals)

Application

N/A Condensate Lines Cookers Cryogenics Evaporators Gas Purge Process Lines Pump Discharge Refrigeration Steam Lines Vacuum Breaker Water Lines

  • 1 CWP Rating BSS, BSA, BSE, BSSV, Restrictor Check: 450 to 2500 CWP depending on size;
    BSSH6, BSSV6: 450 to 6000 CWP depending on size.
    BSSH7: 800 to 6000 CWP depending on size.
    DSV: ASME/ANSI 108.
  • 2 Other body seal materials available upon request.