Kunkle Valve 0537-D01-AHM0030 Valve

The Kunkle Valve 0537-D01-AHM0030 is a high-capacity ASME Section IV safety relief valve engineered for low-pressure hot water boilers, heat exchangers, and generators. This bronze-bodied valve features a 3/4" Female NPT inlet and a 1" Female NPT outlet, specifically calibrated to a 30 PSI set pressure. Designed for professional HVACR contractors, it delivers a robust steam relieving capacity of 1054 lb/h (PPH), equivalent to 1,054,304 BTU/h, ensuring system protection against thermal expansion and over-firing conditions. The internal assembly includes a B584 alloy 8440 seat and a durable SST spring to maintain set-point integrity under continuous thermal cycling. A heavy-duty lift lever is integrated for required manual testing. Meeting National Board certification standards, this pressure relief valve is essential for maintaining code compliance in commercial and residential hydronic heating systems where reliability at the 30 PSI threshold is mandatory.

• Code Compliance: Designed and certified to meet ASME Section IV and National Board requirements for hot water heating boilers.
• High Discharge Capacity: Rated for over 1 million BTU/h, providing sufficient relief for medium-to-large scale boiler applications.
• Corrosion Resistance: Bronze body construction and stainless steel spring material ensure longevity in demanding hydronic environments.
• Manual Override: Equipped with a heavy-duty lift lever for easy operational verification during routine maintenance inspections.
• Optimized Flow: Features an oversized 1" outlet to prevent backpressure buildup during full-flow discharge events.

What is the maximum operating temperature for this valve?
The Kunkle 537 series is typically rated for a temperature range of -20°F to 250°F, making it suitable for standard low-pressure hot water heating applications.

Can this valve be mounted horizontally?
No. To ensure a self-draining body and proper seat alignment, this valve must be installed in a vertical upright position per ASME code.

What is the difference between the 537 and other relief valves?
The 537 series specifically addresses the dual-purpose needs of hot water boilers, handling both liquid thermal expansion and steam generated during over-firing conditions.

This item is not eligible for free shipping.

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.