Food, Beverage & Pharmaceutical Success Story

Facility: Pharmaceutical Facility North East USA

Application Problem: Sanitary Valve Clean in Place Requirement

Solution: DFT® Model DSV® Sanitary Check Valve

Success Since: 2009

Challenge: Through a major engineering firm located in North East USA, home to numerous Pharmaceutical Companies, DFT was contacted to come up with a check valve solution for a Waste Drain. It was important that the check valve meet the following criteria: Sanitary connections, ability to steam clean in place, low cracking pressures, and a tight shut off.

The check valve would be used for medical non-corrosive waste that would be pumped through a drain to a waste drain, with no more than 10 psig at temperatures up to 300F° and low flow of 3 GPM. The line is then flushed with utility water into the waste inactivation line with a duration of 10 minutes flush at 5 GPM. The line is then Steam Sanitized with clean Steam and condensate forced into the waste inactivation line at 330F° at about 30 psi for about 60 minutes. The line is then air dried with compressed air for about 30 minutes at about 20 PSI. This procedure is repeated at least 3 times a day.

Solution: A DFT® 2” model DSV® Check Valve was used to meet the criteria. It is a non-slam spring-assisted check valve designed to prevent flow reversal in industries with strict cleanliness codes. The 2” DSV can be used in a Vertical Position, able to be equipped with a .1 psi cracking spring, is steam cleanable, and is a full body valve with Tri-clamp connections. This check valve was able to withstand the frequent cycles and has been in operation since 2009.

Note: A horizontal valve is available for horizontal lines requiring a self draining valve.

DFT® Model DSV® Sanitary Check Valve Features:

  • Meets 3A Standard 58-02
  • 1/2” to 4” line size
  •  150 CWP, 108 ASME pressure class
  •  Clamped ends
  •  316L body and seat
  •  316 disc, spring & guide assembly
  •  32 Ra internal surface finish (#4 Ground Finish)
  •  Electropolished spring
  •  .16 to .66 psig cracking pressure
  • Standard gasket body seal:
  • -EPDM body seal (300°F max temp)
  • Optional gasket body seal: Tuf-Flex® or Viton® 400°max temp
  •  Edge-guided disc (1/2” thru 2”)
  •  Edge/center-guided disc (2-1/2”, 3″, 4”)
  •  Spring assisted silent closing, non-slam
  •  Tight shutoff – lapped disc & seat
  •  Horizontal or vertical installation

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