Watts 0382820 Relief Valve 30067439-890 Streamlined Installation: Integrated mounting ears

Streamlined Installation: Integrated mounting ears and standard 1/2-inch shaft simplify swap-outs in tight blower compartments

using shielded cable is recommended to prevent electromagnetic interference from affecting the temperature signal

This assembly is specifically rated for low-pressure steam systems up to 15 psig

always utilize a torque wrench to reach the specified 95 in-lb limit to prevent flange cracking

Watts 0382820 Relief Valve 30067439-890 Streamlined Installation: Integrated mounting earsThe Watts 0382820 (Model 740 1 50) is a high capacity boiler pressure relief valve engineered specifically for large scale commercial and industrial hot water heating systems. Designed with a 1 inch NPT inlet and outlet, this valve provides a fixed pressure setting of 50 PSI and features a massive steam discharge capacity of 1,899,000 BTU hr. This model serves as a direct cross reference for the Weil McLain 511 546 950 and is frequently utilized in