3-Port By-Pass Version Series TRVDT For Smooth, Sensitive Operation and the Ultimate in Corrosion Resistance… with No Wetted Elastomers!
Series RVDT in-line relief valves feature a wetted flat PTFE diaphragm to resist both chemical attack and salt crystallization problems. The large, active diaphragm provides for smooth, chatter-free operation. A secondary u-cup seal incorporates the Plast-O-Matic patented Fail Dry® design for added protection. If the rolling diaphragm should fail, liquid will weep through the vent port which is located between the two seals, indicating that maintenance is required. Because the secondary seal prevents liquid from reaching the control spring, maintenance can be conveniently scheduled without need for an emergency shut-down.

  • Relief: protects systems and equipment from over-pressure/pressure surges.
  • By-Pass: prevents pumps from “dead heading”.
  • Back-Pressure: maintains necessary reverse pressure in closed loop systems.
  • 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 close when the pump is off. This valve actually closes tighter when siphon occurs.
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Webb/P#

Item #

Pipe Size

Body Material

Overpressure to Reach Indicated Flow Rate

Price

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N/A N/A 1/4 inches N/A PVC N/A .5 GPM – 5 PSI $309.90 Add To Cart
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N/A N/A 1/2 inches N/A PVC N/A 2 GPM – 8 PSI $363.66 Add To Cart
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N/A 229895 N/A 3/4 inches N/A PVC N/A 5 GPM – 9 PSI $418.44 Add To Cart
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N/A N/A 1 inches N/A PVC N/A 9 GPM – 9 PSI $489.09 Add To Cart
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N/A N/A 1 1/2 inches N/A PVC N/A 25 GPM – 9 PSI $591.32 Add To Cart
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N/A N/A 1/4 inches N/A Natural Polypropylene N/A .5 GPM – 5 PSI $331.42 Add To Cart
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N/A N/A 1/2 inches N/A Natural Polypropylene N/A 2 GPM – 8 PSI $386.13 Add To Cart
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N/A N/A 3/4 inches N/A Natural Polypropylene N/A 8 GPM – 12 PSI $449.97 Add To Cart
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N/A N/A 1 inches N/A Natural Polypropylene N/A 9 GPM – 9 PSI $504.71 Add To Cart
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N/A N/A 1/2 inches N/A PVC N/A 2 GPM – 8 PSI $347.87 Add To Cart
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N/A N/A 3/4 inches N/A PVC N/A 5 GPM – 9 PSI $385.80 Add To Cart
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N/A N/A 1 inches N/A PVC N/A 9 GPM – 9 PSI $450.08 Add To Cart
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N/A N/A 1/2 inches N/A Natural Polypropylene N/A 2 GPM – 8 PSI $397.40 Add To Cart
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N/A N/A 3/4 inches N/A Natural Polypropylene N/A 5 GPM – 9 PSI $456.39 Add To Cart
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N/A N/A 1 inches N/A Natural Polypropylene N/A 9 GPM – 9 PSI $520.72 Add To Cart
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N/A N/A 1/2 inches N/A CPVC N/A 2 GPM – 8 PSI $491.20 Add To Cart
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N/A N/A 3/4 inches N/A CPVC N/A 5 GPM – 9 PSI $541.78 Add To Cart
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N/A N/A 1 inches N/A CPVC N/A 9 GPM – 9 PSI $620.85 Add To Cart
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N/A N/A 1/2 inches N/A PTFE N/A 2 GPM – 8 PSI $757.89 Add To Cart
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N/A N/A 3/4 inches N/A PTFE N/A 5 GPM – 9 PSI $868.57 Add To Cart
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N/A N/A 1 inches N/A PTFE N/A 9 GPM – 9 PSI $999.27 Add To Cart
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N/A N/A 1/2 inches N/A PVDF N/A 2 GPM – 8 PSI $1,082.54 Add To Cart
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N/A N/A 3/4 inches N/A PVDF N/A 5 GPM – 9 PSI $1,259.63 Add To Cart
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N/A N/A 1 inches N/A PVDF N/A 9 GPM – 9 PSI $1,438.81 Add To Cart
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N/A N/A 1/4 inches N/A CPVC N/A .5 GPM – 5 PSI $444.83 Add To Cart
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