Plast-O-Matic Series RVDT Pressure Relief Valves 1/4″ – 4″

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 valve actually closes more tightly when unwanted siphon occurs.