Corrosion Resistant 3-Port Relief Valve

Dec. 22, 2006
Plast-O-Matic Valves, Inc. has announced the addition of Series TRVDT to meet increasing demand for smaller footprint thermoplastic relief valves.The three-port in-line relief valve is ideal for systems requiring minimal footprint or where the use of a piping tee is not practical. It has an economical, heavy-duty design and allows for easy replacement in existing systems.When closed, the valve has a straight-through flow pattern. The pressure set-point s infinitely adjustable between 50 and 100 PSI, and the maximum inlet pressure is 150 PSI. Once the set pressure is reached, the diaphragm is lifted off the center port, and the excess liquid flows out through the third port at the bottom of the valve.The TRVDT model features a PTFE diaphragm seal with no wetted metals or elastomers. This diaphragm allows for the valve's compatibility with highly aggressive, corrosive liquids, thereby eliminating contamination in the system. The large area of the diaphragm makes for higher sensitivity and a lower pressure drop with high flow conditions. An additional non-wetted u-cup seal design includes the patented Fail-Dry vent which provides visual warning of impending seal malfunction. This allows the valve to continue operating until maintenance can be performed on the system, thereby avoiding costly shutdowns. Series TRVDT valves are available in pipe sizes ½", ¾", and 1", in PVC, Natural Polypropylene, PTFE, and Kynar PVDF. The valves can be factory modified for special applications.