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PTFE Diaphragm Relief, By-Pass, Anti-Siphon and Back Pressure Valves
for Smooth, Sensitive Operation and the Ultimate in Corrosion Resistance
...with No Wetted Elastomers or Metals!


Applications:

One valve design functions as an all-purpose backpressure valve in many applications:
  • Relief: protects systems and equipment from over-pressure/pressure surges.
  • By-Pass: prevents pumps from "dead heading".
  • Back-Pressure Regulator: maintains necessary reverse pressure in closed loop systems.
  • Back-Pressure Valve: enhance pump performance by maintaining backpressure on the pump outlet
  • Anti-Siphon: used on the outlet of a pump wherever gravity or other downstream conditions may create negative pressure (siphon) and drain a tank. The valve is pre-set to open under pump pressure, but closes bubble-tight when the pump is shut off. Because of the design of the RVDT, this valveactually closes more tightly when unwanted siphon occurs.
Materials, Sizes & Features:

  • Geon® PVC, Corzan® CPVC, Natural Polypropylene, and Kynar® PVDF body materials in 1/4", 1/2", 3/4", 1", 1 1/2" and 2" sizes.
  • PTFE body material offered in 1/4" - 1" sizes.
  • Relief setting is infinitely adjustable from 5 psi to 100 psi.
  • Maximum inlet pressure is 150 psi.
  • Diaphragm material is PTFE for all sizes and body materials, and is excellent for use with highly aggressive liquids...provides the ultimate in contamination-free sealing.
  • Rugged thermoplastic construction is ideal for a broad range of industrial applications.
  • Large diaphragm area delivers more sensitivity and less pressure drop under flow conditions.
  • Non-wetted u-cup seal provides a second isolation of the control spring; design includes patented Fail-Dry vent, a safety feature that provides visual warning of seal malfunction. This permits the valve to continue operation until a scheduled maintenance can be planned thereby avoiding a costly shutdown. Fail-Dry connection on Series RVDT is 1/8" FNPT.
  • Non-leaching feature of fluoropolymer diaphragm makes it ideal for use with ultra-purewater and concentrated etchants, as in the semiconductor industry.
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1/4" Plastomatic PVC Relief Valve PTFE Diaphragm

1/4" Plastomatic PVC Relief Valve PTFE Diaphragm

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1/4" Plastomatic Polypro Relief Valve PTFE Diaphragm

1/4" Plastomatic Polypro Relief Valve PTFE Diaphragm

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1/2" Plastomatic PVC 90 Degree Relief Valve EPDM Seal

1/2" Plastomatic PVC 90 Degree Relief Valve EPDM Seal

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1/2" Plastomatic PVC Relief Valve PTFE Diaphragm

1/2" Plastomatic PVC Relief Valve PTFE Diaphragm

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1/2" Plastomatic PVC 90 Degree Relief Valve Viton Seal

1/2" Plastomatic PVC 90 Degree Relief Valve Viton Seal

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1/2" Plastomatic Polypro Relief Valve PTFE Diaphragm

1/2" Plastomatic Polypro Relief Valve PTFE Diaphragm

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1/2" Plastomatic Polypro 90 Degree Relief Valve EPDM Seal

1/2" Plastomatic Polypro 90 Degree Relief Valve EPDM Seal

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1/2" Plastomatic Polypro 90 Degree Relief Valve Viton Seal

1/2" Plastomatic Polypro 90 Degree Relief Valve Viton Seal

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3/4" Plastomatic PVC Relief Valve PTFE Diaphragm

3/4" Plastomatic PVC Relief Valve PTFE Diaphragm

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3/4" Plastomatic PVC 90 Degree Relief Valve EPDM Seal

3/4" Plastomatic PVC 90 Degree Relief Valve EPDM Seal

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3/4" Plastomatic PVC 90 Degree Relief Valve Viton Seal

3/4" Plastomatic PVC 90 Degree Relief Valve Viton Seal

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3/4" Plastomatic Polypro Relief Valve PTFE Diaphragm

3/4" Plastomatic Polypro Relief Valve PTFE Diaphragm

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3/4" Plastomatic Polypro 90 Degree Relief Valve EPDM Seal

3/4" Plastomatic Polypro 90 Degree Relief Valve EPDM Seal

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3/4" Plastomatic Polypro 90 Degree Relief Valve Viton Seal

3/4" Plastomatic Polypro 90 Degree Relief Valve Viton Seal

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1" Plastomatic PVC Relief Valve PTFE Diaphragm

1" Plastomatic PVC Relief Valve PTFE Diaphragm

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