DFT® Inc
DFT® Inc
140 Sheree Blvd. PO Box 566
Exton, PA 19341-0566
Phone: 800.206.4013
Fax: 847.540.1422
Email: dft@dft-valves.com
Website: www.dft-valves.com
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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.

The DFT® sanitary check valves meet 3-A Standard 58-02 and certified Clean in Place. Applications include pharmaceutical, chemical, beverage/beer, food, dairy industries and others.
Unit of Measure

Inventory

Inventory

 N/A {0}

Specifications

Series

 N/A DSV®

Size

 N/A 4.00 in

Style

 N/A Horizontal

ASME CLASS

 N/A 108

Cold Working Pressure

 N/A 150 psig

Working Steam Pressure

 N/A 115 psig

Dimension A

 N/A 6.25 in

Dimension B

 N/A 7 in

Dimension C

 N/A 0.97 in

Dimension D

 N/A 4.68 in

Weight

 N/A 22.2 lb

Horizontal Cracking Pressure CP

 N/A 0.5 psig0.035 bar

Temperature Rating

 N/A 149 ºC (with standard EPDM seal) -28.89 to 148.89 ºC-20 to 300 ºF

ENDS

 N/A Clamped

ASTM

 N/A A351 CF3M

MSS

 N/A SP-25 SP-61

Trim

 N/A 316 SS

Other

 N/A API 3A 58-02

Cv

 N/A 137

Valve Selection Chart

ASME CWP1 N/A 150

Materials of Construction

Body

 N/A 316L SS

Seat

 N/A 316 SS

Disc

 N/A 316 SS

Spring

 N/A 316 SS

Guide Assembly

 N/A 316 SS
Body Seal2 N/A Tuf-Flex® (-20 to 300ºF)

Clamp

 N/A 304 SS

Internal Surface Finish

 N/A 32 Ra Internal Surface Finish

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 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.