Check for consistent 24VAC at the input terminals and confirm the grounding circuit is secure

this iron-body pressure relief valve is designed specifically for non-potable hot water heating systems and does not meet low-lead requirements for drinking water

Operating on a single-phase 60Hz power supply

the valve can be installed in any orientation

When performing a section block repair or teardown

Kunkle Valve 0537-H01-HM0030 Valve 320734-701 Check for consistent 24VAC atThe Kunkle Valve 0537 H01 HM0030 is a heavy duty ASME Section IV steam relief valve engineered specifically for high capacity hot water boiler applications. Constructed with a bronze B584 alloy 8440 seat and a durable stainless steel spring, this valve ensures reliable overpressure protection in demanding commercial and industrial heating systems. Featuring a 2" FNPT inlet and a 2 1 2" FNPT outlet, it is factory set at 30 PSI, delivering a certified