Designed for precision and reliability

As an auto-reset limit switch

7 microamps within this period

0 to 30 Psi Range

Designed with a 1/2" NPT connection

McDonnell & Miller 250-1-30 Valve 30067439-890 Designed for precision and reliabilityFor high performance hydronic heating systems, the McDonnell & Miller 250 1 30 (Part Number 181925) is a heavy duty 1" NPT pressure relief valve engineered to protect ASME Section IV pressure vessels. This bronze body relief valve is factory set at 30 PSI and provides a substantial 1,170,000 BTU capacity to prevent over pressure conditions in large scale boiler applications. Designed for maximum durability, it features an EPDM rubber diaphragm and