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Technical Articles
October 8, 2018

Compact Angle Pattern Relief/Bypass/Backpressure Valves Series RVD


series rvd relief valve



  • 1/4″ and 1/2″ pipe sizes; also BSP/DIN/JIS Metric, spigots, flare.
  • Offered in Geon PVC, Natural Polypro, PTFE & Kynar PVDF bodies.
  • Protect systems and equipment from dangerous overpressures.
  • For use as back pressure valve, straight relief, by-pass relief or back pressure regulator.
  • Offer wide range of pressure settings from 5-150 PSI (0.4-10.4 BAR) with sensitive operation.
  • Designed with PTFE guides for non-sticking operation.
  • Diaphram design eliminates crystallization problems.
  • Provide minimum maintenance through simple and efficient design.


     Film Click here for brief video of how a relief valve works.



Flow Rate Reference Chart for Series RVD

flow rates for series rvd

Cutaway View


Relief Valve Dimensions for Series RVD



rvd dimensional drawing                                                                                          rvd dimension table


Plastic pressure relief valves are multi-functional, normally-closed valves for system pressure relief, pump protection, enhancing pump performance, by-pass relief, and balancing pressure in a process system.

For anti-siphon applications, Plast-O-Matic series RVDT features a unique PTFE diaphragm.

Available in Geon PVC, Kynar PVDF, Natural Polypropylene, and PTFE; sizes 1/4″ to 3″ NPT.

Ideal for corrosive and other chemical process, as well as deionized water, reverse osmosis water…any ultra-pure liquid.

Plast-O-Matic relief valves deliver higher flow at lower overpressures than other typical relief valves. Operation is smooth, sensitive and extremely accurate.



Ordering Information:


RVD Homepage