Kunkle Valve 0537-G01-HM0060 Relief Valve

The Kunkle 0537-G01-HM0060 Relief Valve is a heavy-duty, ASME Section IV "HV" certified safety device specifically engineered for low-pressure hot water boilers, heat exchangers, and generators. This 1-1/2" x 2" direct spring relief valve provides reliable overpressure protection, managing capacities up to 5,919 lb/hr (5,919,055 BTU/h) at a 60 PSI set pressure. Built with a cast iron body (standard for 1-1/2" and 2" models) and a high-performance bronze B584 alloy 84400 seat, it features a stainless steel spring and an EPDM resilient insert for superior seat tightness. The integrated isolating diaphragm protects internal working parts from corrosive discharge, ensuring operational longevity in demanding hydronic systems. Its top-guided disc assembly and pivot design eliminate spring side thrust, maintaining precise alignment for consistent opening and closing cycles.

• Dual-Purpose Protection: Relieves overpressure from thermal expansion during normal cycles and critical over-firing conditions caused by control failure.
• Corrosion Resistance: Features an isolating diaphragm and stainless steel technical components to safeguard against internal scale and mineral buildup.
• Code Compliance: ASME Section IV and XIII "HV" National Board certified for industrial and commercial steam safety requirements.
• System Reliability: Heavy-duty lift lever allows for manual testing and verification, a standard requirement for contractor boiler inspections.
• Durable Construction: Extra-heavy cast iron and bronze trim provide a wide temperature range of -20°F to 250°F.

Common Questions

Is this valve compatible with potable water systems?
No, the 0537-G01-HM series is designed for non-potable hot water boilers and steam applications. It is not lead-free rated for drinking water systems.

Can I use this for high-pressure steam applications?
This specific model is set to 60 PSI and is rated under ASME Section IV for low-pressure systems. Always verify your boiler's Max Allowable Working Pressure (MAWP) before installation.

What is the difference between the 0537 and 537 model numbers?
The 0537-G01-HM0060 and 537-G01-HM0060 are functionally identical. The leading zero is frequently used in manufacturer database systems but refers to the same valve specifications.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.