Description
Kunkle Valve 0537-H01-HM0125 — ASME Section IV Pressure Relief Valve
The Kunkle Valve 0537-H01-HM0125 is a heavy-duty pressure relief valve engineered for steam and hot water boiler applications requiring dependable overpressure protection. With a 2″ Female NPT inlet and 2-1/2″ Female NPT outlet, this valve is built for high-capacity boiler systems and is manufactured to meet the rigorous demands of commercial and industrial hydronic heating installations.
Key Specifications
- SKU: 0537-H01-HM0125
- Inlet Connection: 2″ Female NPT (FNPT)
- Outlet Connection: 2-1/2″ Female NPT (FNPT)
- Set Pressure: 125 PSI
- Capacity: 19,850 lb/h (PPH) steam
- BTU/h Capacity: 19,850,119 BTU/h
- Body Material: Bronze (B584 alloy)
- Seat Material: 8440 alloy
- Spring Material: Stainless Steel (SST)
- Certification: ASME Section IV (Steam / Hot Water Boiler)
Product Overview
Designed and certified to ASME Section IV standards, the Kunkle 0537-H01-HM0125 provides reliable overpressure protection for steam and hot water boiler systems. The bronze B584 alloy body delivers excellent corrosion resistance and long service life in demanding hydronic environments. The 8440 alloy seat ensures a tight, leak-free seal under repeated cycling, while the stainless steel spring provides consistent set-point accuracy and resistance to corrosion and fatigue.
With a rated capacity of 19,850 lb/h (PPH) and an impressive 19,850,119 BTU/h, this valve is sized for large-scale boiler systems where high-flow relief is critical. The 125 PSI set pressure makes it ideal for medium-pressure steam and hot water boiler applications.
Features & Benefits
- ASME Section IV certified — meets code requirements for steam and hot water boiler installations
- High-capacity relief — 19,850 lb/h and over 19.8 million BTU/h for large boiler systems
- Bronze B584 alloy body — superior corrosion resistance for long-term reliability
- 8440 alloy seat — ensures tight shutoff and extended seat life
- Stainless steel spring — resists corrosion and fatigue for consistent set-point performance
- 2″ FNPT inlet x 2-1/2″ FNPT outlet — easy integration into standard boiler piping
- Set at 125 PSI — precise factory-set pressure for dependable overpressure protection
Applications
- Commercial and industrial steam boilers
- Hot water heating boilers (ASME Section IV)
- High-capacity hydronic heating systems
- Boiler rooms requiring code-compliant pressure relief
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