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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 fastenedmore
Unit of Measure

Inventory

Inventory

Specifications

Series

DSV®

Size

0.50 in

Style

Vertical

ASME CLASS

108

Cold Working Pressure

150 psig

Working Steam Pressure

90 psig

Dimension A

2.50 in

Dimension B

1.5 in

Dimension D

0.98 in

Weight

1.4 lb

Flow Down Cracking Pressure CP

0.26 psig

Flow Up Cracking Pressure CP

0.33 psig

Horizontal Cracking Pressure CP

0.29 psig0.02 bar

Temperature Rating

149 ºC (with standard EPDM seal) -28.89 to 232.22 ºC-20 to 450 ºF

ENDS

Clamped

ASTM

A351 CF3M

MSS

SP-25 SP-61

Trim

316 SS

Other

API 3A 58-02

Cv

2.4

Valve Selection Chart

ASME CWP1 150

Materials of Construction

Body

316L SS

Seat

316L SS

Disc

316 SS

Spring

316 SS (Electropolished)

Guide Assembly

316 SS
Body Seal2 Tuf-Steel® (-325 to 550ºF)

Clamp

304 SS

Internal Surface Finish

32 Ra Internal Surface Finish

Body Material

Stainless Steel

Codes and Standards

ANSI

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 Internal Finish; Tuf-Steel Body Seal (450F max); Viton Body Seal (400F max)

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.