McDonnell & Miller 250-1-75 Valve
Install the McDonnell & Miller 250-1-75 Valve to effectively manage thermal expansion and protect hydronic heating systems and storage tanks from over-pressure. This 1" NPT pressure relief valve is specifically designed for high-capacity applications, offering a robust 2,385,000 BTU capacity at a precise 75 PSI set pressure. Built with a durable bronze body and seat, the 182325 model utilizes an EPDM rubber diaphragm and seat disc to ensure reliable shut-off and minimize internal leakage. It features a low differential pressure—only 3 PSI between opening and closing—which significantly reduces hammering during flash steam conditions. Fully compliant with ASME Pressure Vessel and Boiler Code Section IV, this valve supports a maximum operating temperature of 250°F. Whether performing a boiler pressure relief valve replacement or a new commercial HVAC maintenance install, this unit provides the essential over-pressure protection required for code-compliant hydronic assemblies. Rely on this bronze relief valve for consistent performance in demanding industrial and commercial water systems.
Key Benefits:
- High BTU Rating: Handles up to 2,385,000 BTU, making it suitable for large-scale boiler and tank configurations.
- ASME Section IV Certified: Ensures compliance with strict safety standards for pressure-relieving safety valves.
- Anti-Hammer Design: Low 3 PSI differential between opening and closing points prevents system vibration and localized water hammer.
- Thermal Resiliency: Rated for temperatures up to 250°F with a reliable EPDM seat disc for high-heat applications.
- Durable Construction: Heavy-duty bronze body provides superior corrosion resistance in hydronic environments.
Common Questions:
What is the flow direction for this McDonnell & Miller valve?
The valve features a 1" NPT threaded inlet and outlet. For proper operation, ensure the inlet is connected directly to the pressure vessel or boiler supply and the discharge is piped to a safe drain according to local plumbing codes.
Can this valve be used for steam applications?
The Series 250 is primarily engineered for water systems and hydronic heating. While it handles flash steam efficiently to prevent hammering, always verify your specific system requirements against the 2,385,000 BTU water rating.
Is the set pressure adjustable in the field?
No, this safety relief valve is factory-set at 75 PSI and is tamper-resistant. If your system requires a different relief setting, a valve with the specific required PSI must be selected.
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.
Original: $261.96
-65%$261.96
$91.69McDonnell & Miller 250-1-75 Valve
Install the McDonnell & Miller 250-1-75 Valve to effectively manage thermal expansion and protect hydronic heating systems and storage tanks from over-pressure. This 1" NPT pressure relief valve is specifically designed for high-capacity applications, offering a robust 2,385,000 BTU capacity at a precise 75 PSI set pressure. Built with a durable bronze body and seat, the 182325 model utilizes an EPDM rubber diaphragm and seat disc to ensure reliable shut-off and minimize internal leakage. It features a low differential pressure—only 3 PSI between opening and closing—which significantly reduces hammering during flash steam conditions. Fully compliant with ASME Pressure Vessel and Boiler Code Section IV, this valve supports a maximum operating temperature of 250°F. Whether performing a boiler pressure relief valve replacement or a new commercial HVAC maintenance install, this unit provides the essential over-pressure protection required for code-compliant hydronic assemblies. Rely on this bronze relief valve for consistent performance in demanding industrial and commercial water systems.
Key Benefits:
- High BTU Rating: Handles up to 2,385,000 BTU, making it suitable for large-scale boiler and tank configurations.
- ASME Section IV Certified: Ensures compliance with strict safety standards for pressure-relieving safety valves.
- Anti-Hammer Design: Low 3 PSI differential between opening and closing points prevents system vibration and localized water hammer.
- Thermal Resiliency: Rated for temperatures up to 250°F with a reliable EPDM seat disc for high-heat applications.
- Durable Construction: Heavy-duty bronze body provides superior corrosion resistance in hydronic environments.
Common Questions:
What is the flow direction for this McDonnell & Miller valve?
The valve features a 1" NPT threaded inlet and outlet. For proper operation, ensure the inlet is connected directly to the pressure vessel or boiler supply and the discharge is piped to a safe drain according to local plumbing codes.
Can this valve be used for steam applications?
The Series 250 is primarily engineered for water systems and hydronic heating. While it handles flash steam efficiently to prevent hammering, always verify your specific system requirements against the 2,385,000 BTU water rating.
Is the set pressure adjustable in the field?
No, this safety relief valve is factory-set at 75 PSI and is tamper-resistant. If your system requires a different relief setting, a valve with the specific required PSI must be selected.
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
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Description
Install the McDonnell & Miller 250-1-75 Valve to effectively manage thermal expansion and protect hydronic heating systems and storage tanks from over-pressure. This 1" NPT pressure relief valve is specifically designed for high-capacity applications, offering a robust 2,385,000 BTU capacity at a precise 75 PSI set pressure. Built with a durable bronze body and seat, the 182325 model utilizes an EPDM rubber diaphragm and seat disc to ensure reliable shut-off and minimize internal leakage. It features a low differential pressure—only 3 PSI between opening and closing—which significantly reduces hammering during flash steam conditions. Fully compliant with ASME Pressure Vessel and Boiler Code Section IV, this valve supports a maximum operating temperature of 250°F. Whether performing a boiler pressure relief valve replacement or a new commercial HVAC maintenance install, this unit provides the essential over-pressure protection required for code-compliant hydronic assemblies. Rely on this bronze relief valve for consistent performance in demanding industrial and commercial water systems.
Key Benefits:
- High BTU Rating: Handles up to 2,385,000 BTU, making it suitable for large-scale boiler and tank configurations.
- ASME Section IV Certified: Ensures compliance with strict safety standards for pressure-relieving safety valves.
- Anti-Hammer Design: Low 3 PSI differential between opening and closing points prevents system vibration and localized water hammer.
- Thermal Resiliency: Rated for temperatures up to 250°F with a reliable EPDM seat disc for high-heat applications.
- Durable Construction: Heavy-duty bronze body provides superior corrosion resistance in hydronic environments.
Common Questions:
What is the flow direction for this McDonnell & Miller valve?
The valve features a 1" NPT threaded inlet and outlet. For proper operation, ensure the inlet is connected directly to the pressure vessel or boiler supply and the discharge is piped to a safe drain according to local plumbing codes.
Can this valve be used for steam applications?
The Series 250 is primarily engineered for water systems and hydronic heating. While it handles flash steam efficiently to prevent hammering, always verify your specific system requirements against the 2,385,000 BTU water rating.
Is the set pressure adjustable in the field?
No, this safety relief valve is factory-set at 75 PSI and is tamper-resistant. If your system requires a different relief setting, a valve with the specific required PSI must be selected.
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.
