Series TRVDT three-port, in-line relief valve

The Series TRVDT 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 that allows for easy replacement in existing systems. When closed, the valve has a straight-through flow pattern. The pressure setpoint is 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. An additional non-wetted U-cup seal design includes the firm’s patented Fail-Dry vent, which provides visual warning of impending seal malfunction. The valves are available in 1/2-, 3/4-, and 1-in. pipe sizes, and can be made from PVC, natural polypropylene, PTFE and Kynar PVDF.