
Kunkle Valve 0537-H01-HM0125 Valve
The Kunkle Valve 0537-H01-HM0125 (also identified as 537-H01-HM0125) is a high-capacity ASME Section IV pressure relief valve engineered for low-pressure steam and hot water boiler applications. Featuring a 2" Female NPT inlet and a 2 1/2" Female NPT outlet, this valve is factory-set at 125 PSI with a certified relieving capacity of 19,850 lb/h (PPH) or approximately 19,850,119 BTU/h. The cast iron body construction and B584 alloy 84400 bronze seat provide the durability required for heavy-duty commercial heating systems. An EPDM resilient seal in the seating area ensures bubble-tight shutoff, while the stainless steel spring (SST) maintains consistent set pressure across a temperature range of -20° to 250°F. The design incorporates an isolating diaphragm to shield internal working parts from corrosive discharge and a heavy-duty lift lever for manual testing. This HV National Board certified valve is a direct solution for preventing overpressure in heat exchangers and generators.
Key Benefits
- High Relieving Capacity: Delivers 19,850 lb/h to handle significant overpressure events in large-scale boiler systems.
- Corrosion Protection: The internal diaphragm isolates the stainless steel spring and guide surfaces from the media to prevent scale buildup.
- Precision Alignment: Pivot design between the disc and spring compensates for side thrust, ensuring consistent reseating.
- Bubble-Tight Seal: The top-guided disc assembly utilizes a resilient EPDM insert for superior leak resistance compared to metal-to-metal seats.
- Code Compliance: Meets ASME Section IV and XIII requirements for "HV" stamped heating boiler safety relief.
Common Questions
What is the difference between the 0537 and 537 model numbers?
The 0537-H01-HM0125 and 537-H01-HM0125 are identical technical units; the leading zero is often a catalog prefix used for inventory management.
Is this valve suitable for high-pressure steam?
No, this valve is specifically designed and certified under ASME Section IV for low-pressure hot water boilers and steam applications up to 160 PSI. For high-pressure power boilers, an ASME Section I valve is required.
Can the set pressure be adjusted in the field?
Standard pressure relief valves like the Kunkle 537 series are factory-set and sealed. Adjusting the set pressure in the field voids the National Board certification and may compromise system safety.
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.
Kunkle Valve 0537-H01-HM0125 Valve
The Kunkle Valve 0537-H01-HM0125 (also identified as 537-H01-HM0125) is a high-capacity ASME Section IV pressure relief valve engineered for low-pressure steam and hot water boiler applications. Featuring a 2" Female NPT inlet and a 2 1/2" Female NPT outlet, this valve is factory-set at 125 PSI with a certified relieving capacity of 19,850 lb/h (PPH) or approximately 19,850,119 BTU/h. The cast iron body construction and B584 alloy 84400 bronze seat provide the durability required for heavy-duty commercial heating systems. An EPDM resilient seal in the seating area ensures bubble-tight shutoff, while the stainless steel spring (SST) maintains consistent set pressure across a temperature range of -20° to 250°F. The design incorporates an isolating diaphragm to shield internal working parts from corrosive discharge and a heavy-duty lift lever for manual testing. This HV National Board certified valve is a direct solution for preventing overpressure in heat exchangers and generators.
Key Benefits
- High Relieving Capacity: Delivers 19,850 lb/h to handle significant overpressure events in large-scale boiler systems.
- Corrosion Protection: The internal diaphragm isolates the stainless steel spring and guide surfaces from the media to prevent scale buildup.
- Precision Alignment: Pivot design between the disc and spring compensates for side thrust, ensuring consistent reseating.
- Bubble-Tight Seal: The top-guided disc assembly utilizes a resilient EPDM insert for superior leak resistance compared to metal-to-metal seats.
- Code Compliance: Meets ASME Section IV and XIII requirements for "HV" stamped heating boiler safety relief.
Common Questions
What is the difference between the 0537 and 537 model numbers?
The 0537-H01-HM0125 and 537-H01-HM0125 are identical technical units; the leading zero is often a catalog prefix used for inventory management.
Is this valve suitable for high-pressure steam?
No, this valve is specifically designed and certified under ASME Section IV for low-pressure hot water boilers and steam applications up to 160 PSI. For high-pressure power boilers, an ASME Section I valve is required.
Can the set pressure be adjusted in the field?
Standard pressure relief valves like the Kunkle 537 series are factory-set and sealed. Adjusting the set pressure in the field voids the National Board certification and may compromise system safety.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Kunkle Valve 0537-H01-HM0125 (also identified as 537-H01-HM0125) is a high-capacity ASME Section IV pressure relief valve engineered for low-pressure steam and hot water boiler applications. Featuring a 2" Female NPT inlet and a 2 1/2" Female NPT outlet, this valve is factory-set at 125 PSI with a certified relieving capacity of 19,850 lb/h (PPH) or approximately 19,850,119 BTU/h. The cast iron body construction and B584 alloy 84400 bronze seat provide the durability required for heavy-duty commercial heating systems. An EPDM resilient seal in the seating area ensures bubble-tight shutoff, while the stainless steel spring (SST) maintains consistent set pressure across a temperature range of -20° to 250°F. The design incorporates an isolating diaphragm to shield internal working parts from corrosive discharge and a heavy-duty lift lever for manual testing. This HV National Board certified valve is a direct solution for preventing overpressure in heat exchangers and generators.
Key Benefits
- High Relieving Capacity: Delivers 19,850 lb/h to handle significant overpressure events in large-scale boiler systems.
- Corrosion Protection: The internal diaphragm isolates the stainless steel spring and guide surfaces from the media to prevent scale buildup.
- Precision Alignment: Pivot design between the disc and spring compensates for side thrust, ensuring consistent reseating.
- Bubble-Tight Seal: The top-guided disc assembly utilizes a resilient EPDM insert for superior leak resistance compared to metal-to-metal seats.
- Code Compliance: Meets ASME Section IV and XIII requirements for "HV" stamped heating boiler safety relief.
Common Questions
What is the difference between the 0537 and 537 model numbers?
The 0537-H01-HM0125 and 537-H01-HM0125 are identical technical units; the leading zero is often a catalog prefix used for inventory management.
Is this valve suitable for high-pressure steam?
No, this valve is specifically designed and certified under ASME Section IV for low-pressure hot water boilers and steam applications up to 160 PSI. For high-pressure power boilers, an ASME Section I valve is required.
Can the set pressure be adjusted in the field?
Standard pressure relief valves like the Kunkle 537 series are factory-set and sealed. Adjusting the set pressure in the field voids the National Board certification and may compromise system safety.
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.












