Watts 0278328 Valve
The Watts 0278328 (Model 174A-2-50) is a high-capacity ASME Section IV certified boiler pressure relief valve designed for commercial hot water space heating and domestic supply applications. Featuring a 2-inch NPT female threaded inlet and outlet, this bronze body safety valve provides critical overpressure protection for large-scale boiler systems. It is factory-set at 50 PSI, delivering a verified steam discharge capacity of 5,575,000 BTU/hr. Its construction includes a stainless steel spring and non-metallic disc-to-metal seating to prevent sticking and freezing in demanding environments. This veteran-grade Watts 174A series valve incorporates a water seal of high-temperature resisting material to isolate internal working parts from water during relief, ensuring long-term seat integrity. The design includes a raised seat and non-mechanical disc alignment to prevent sediment buildup and fouling, making it the standard for HVAC contractors requiring reliable emergency safety relief.
Key Benefits- High BTU Capacity: Engineered with a 5,575,000 BTU/hr rating to handle high-output commercial boilers.
- Corrosion Resistance: Heavy-duty bronze body and stainless steel spring withstand aggressive water conditions.
- Seat Integrity: Non-metallic disc-to-metal seating and an above-drain seat design eliminate sediment entrapment and seat fouling.
- ASME Certified: Fully compliant with ASME Section IV requirements for pressure protection in hydronic heating systems.
- Operational Reliability: Water seal isolates the spring from discharge, preventing mineral buildup and "simmering" issues.
What is the maximum operating temperature for this valve?
The Watts 174A series is rated for a maximum operating temperature of 250°F (121°C).
Can this valve be used as an operating control?
No, this remains an emergency safety relief device only and must never be utilized as a primary pressure or temperature operating control.
Does this model include a flood sensor?
The 174A-2-50 is compatible with the Watts SentryPlus Alert technology; however, a separate connection kit is required to activate and integrate flood detection with a building management system.
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.
Original: $1,217.44
-65%$1,217.44
$426.10Watts 0278328 Valve
The Watts 0278328 (Model 174A-2-50) is a high-capacity ASME Section IV certified boiler pressure relief valve designed for commercial hot water space heating and domestic supply applications. Featuring a 2-inch NPT female threaded inlet and outlet, this bronze body safety valve provides critical overpressure protection for large-scale boiler systems. It is factory-set at 50 PSI, delivering a verified steam discharge capacity of 5,575,000 BTU/hr. Its construction includes a stainless steel spring and non-metallic disc-to-metal seating to prevent sticking and freezing in demanding environments. This veteran-grade Watts 174A series valve incorporates a water seal of high-temperature resisting material to isolate internal working parts from water during relief, ensuring long-term seat integrity. The design includes a raised seat and non-mechanical disc alignment to prevent sediment buildup and fouling, making it the standard for HVAC contractors requiring reliable emergency safety relief.
Key Benefits- High BTU Capacity: Engineered with a 5,575,000 BTU/hr rating to handle high-output commercial boilers.
- Corrosion Resistance: Heavy-duty bronze body and stainless steel spring withstand aggressive water conditions.
- Seat Integrity: Non-metallic disc-to-metal seating and an above-drain seat design eliminate sediment entrapment and seat fouling.
- ASME Certified: Fully compliant with ASME Section IV requirements for pressure protection in hydronic heating systems.
- Operational Reliability: Water seal isolates the spring from discharge, preventing mineral buildup and "simmering" issues.
What is the maximum operating temperature for this valve?
The Watts 174A series is rated for a maximum operating temperature of 250°F (121°C).
Can this valve be used as an operating control?
No, this remains an emergency safety relief device only and must never be utilized as a primary pressure or temperature operating control.
Does this model include a flood sensor?
The 174A-2-50 is compatible with the Watts SentryPlus Alert technology; however, a separate connection kit is required to activate and integrate flood detection with a building management system.
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.
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Description
The Watts 0278328 (Model 174A-2-50) is a high-capacity ASME Section IV certified boiler pressure relief valve designed for commercial hot water space heating and domestic supply applications. Featuring a 2-inch NPT female threaded inlet and outlet, this bronze body safety valve provides critical overpressure protection for large-scale boiler systems. It is factory-set at 50 PSI, delivering a verified steam discharge capacity of 5,575,000 BTU/hr. Its construction includes a stainless steel spring and non-metallic disc-to-metal seating to prevent sticking and freezing in demanding environments. This veteran-grade Watts 174A series valve incorporates a water seal of high-temperature resisting material to isolate internal working parts from water during relief, ensuring long-term seat integrity. The design includes a raised seat and non-mechanical disc alignment to prevent sediment buildup and fouling, making it the standard for HVAC contractors requiring reliable emergency safety relief.
Key Benefits- High BTU Capacity: Engineered with a 5,575,000 BTU/hr rating to handle high-output commercial boilers.
- Corrosion Resistance: Heavy-duty bronze body and stainless steel spring withstand aggressive water conditions.
- Seat Integrity: Non-metallic disc-to-metal seating and an above-drain seat design eliminate sediment entrapment and seat fouling.
- ASME Certified: Fully compliant with ASME Section IV requirements for pressure protection in hydronic heating systems.
- Operational Reliability: Water seal isolates the spring from discharge, preventing mineral buildup and "simmering" issues.
What is the maximum operating temperature for this valve?
The Watts 174A series is rated for a maximum operating temperature of 250°F (121°C).
Can this valve be used as an operating control?
No, this remains an emergency safety relief device only and must never be utilized as a primary pressure or temperature operating control.
Does this model include a flood sensor?
The 174A-2-50 is compatible with the Watts SentryPlus Alert technology; however, a separate connection kit is required to activate and integrate flood detection with a building management system.
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.
