Watts 0383793 Valve
The Watts 0383793 (Series 374A-M1) is a high-capacity 1-1/2 inch water pressure relief valve engineered specifically for technical protection in large-scale hot water heating boiler systems. Featuring a rugged iron body construction with a forged bronze inlet, this valve is designed to handle high-demand thermal expansion and prevent over-pressurization in commercial hydronic circuits. With a precise 55 PSI pressure setting and a steam discharge capacity of 4,572,000 BTU/hr, it meets the rigorous safety requirements for high-output boiler equipment and closed-loop HVAC systems. The internal design includes a non-metallic disc-to-metal seating and a stainless steel spring to prevent sticking and freezing, ensuring a reliable reset after discharge. This ASME-rated valve utilizes an "above drain" seat design, which prevents sediment accumulation from fouling the seal, a frequent failure point in standard relief valves. For contractors managing large commercial boilers or chillers, the Watts 1-1/2" relief valve provides the flow rates necessary to prevent equipment failure during thermal runaway events.
Key Benefits- Extreme BTU Capacity: Rated for up to 4,572,000 BTU/hr, making it suitable for high-output industrial and commercial boilers.
- Anti-Foul Seat Design: The seat is positioned above the drain line to prevent sediment and mineral buildup from causing relief valve leakage.
- Corrosion Resistance: Built with an iron body and forged bronze inlet to withstand harsh water conditions and high temperatures up to 250°F.
- Reliable Mechanical Alignment: Features a non-mechanical seat-to-disc alignment that eliminates the risk of the valve "freezing" in the closed position.
- Standardized Fit: 1-1/2" NPT female inlet and outlet connections provide seamless integration into existing ASME boiler pressure relief piping.
Is the Watts 0383793 suitable for steam boilers?
No, this valve is specifically designed for hot water heating boilers and liquid-based hydronic systems. While it has a high BTU steam discharge rating for safety relief, it should not be used as a primary steam safety valve.
What causes a relief valve to drip after a pressure spike?
Dripping is usually caused by sediment on the valve seat. The 374A series minimizes this with its raised seat design, but if debris is trapped during a discharge, the manual test lever should be operated to flush the waterways.
Can I install this valve in a horizontal orientation?
For optimal performance and to ensure the safety discharge functions correctly, it is recommended to install the valve in a vertical upright position as per ASME Section IV standards.
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: $1,198.65
-65%$1,198.65
$419.53Watts 0383793 Valve
The Watts 0383793 (Series 374A-M1) is a high-capacity 1-1/2 inch water pressure relief valve engineered specifically for technical protection in large-scale hot water heating boiler systems. Featuring a rugged iron body construction with a forged bronze inlet, this valve is designed to handle high-demand thermal expansion and prevent over-pressurization in commercial hydronic circuits. With a precise 55 PSI pressure setting and a steam discharge capacity of 4,572,000 BTU/hr, it meets the rigorous safety requirements for high-output boiler equipment and closed-loop HVAC systems. The internal design includes a non-metallic disc-to-metal seating and a stainless steel spring to prevent sticking and freezing, ensuring a reliable reset after discharge. This ASME-rated valve utilizes an "above drain" seat design, which prevents sediment accumulation from fouling the seal, a frequent failure point in standard relief valves. For contractors managing large commercial boilers or chillers, the Watts 1-1/2" relief valve provides the flow rates necessary to prevent equipment failure during thermal runaway events.
Key Benefits- Extreme BTU Capacity: Rated for up to 4,572,000 BTU/hr, making it suitable for high-output industrial and commercial boilers.
- Anti-Foul Seat Design: The seat is positioned above the drain line to prevent sediment and mineral buildup from causing relief valve leakage.
- Corrosion Resistance: Built with an iron body and forged bronze inlet to withstand harsh water conditions and high temperatures up to 250°F.
- Reliable Mechanical Alignment: Features a non-mechanical seat-to-disc alignment that eliminates the risk of the valve "freezing" in the closed position.
- Standardized Fit: 1-1/2" NPT female inlet and outlet connections provide seamless integration into existing ASME boiler pressure relief piping.
Is the Watts 0383793 suitable for steam boilers?
No, this valve is specifically designed for hot water heating boilers and liquid-based hydronic systems. While it has a high BTU steam discharge rating for safety relief, it should not be used as a primary steam safety valve.
What causes a relief valve to drip after a pressure spike?
Dripping is usually caused by sediment on the valve seat. The 374A series minimizes this with its raised seat design, but if debris is trapped during a discharge, the manual test lever should be operated to flush the waterways.
Can I install this valve in a horizontal orientation?
For optimal performance and to ensure the safety discharge functions correctly, it is recommended to install the valve in a vertical upright position as per ASME Section IV standards.
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 0383793 (Series 374A-M1) is a high-capacity 1-1/2 inch water pressure relief valve engineered specifically for technical protection in large-scale hot water heating boiler systems. Featuring a rugged iron body construction with a forged bronze inlet, this valve is designed to handle high-demand thermal expansion and prevent over-pressurization in commercial hydronic circuits. With a precise 55 PSI pressure setting and a steam discharge capacity of 4,572,000 BTU/hr, it meets the rigorous safety requirements for high-output boiler equipment and closed-loop HVAC systems. The internal design includes a non-metallic disc-to-metal seating and a stainless steel spring to prevent sticking and freezing, ensuring a reliable reset after discharge. This ASME-rated valve utilizes an "above drain" seat design, which prevents sediment accumulation from fouling the seal, a frequent failure point in standard relief valves. For contractors managing large commercial boilers or chillers, the Watts 1-1/2" relief valve provides the flow rates necessary to prevent equipment failure during thermal runaway events.
Key Benefits- Extreme BTU Capacity: Rated for up to 4,572,000 BTU/hr, making it suitable for high-output industrial and commercial boilers.
- Anti-Foul Seat Design: The seat is positioned above the drain line to prevent sediment and mineral buildup from causing relief valve leakage.
- Corrosion Resistance: Built with an iron body and forged bronze inlet to withstand harsh water conditions and high temperatures up to 250°F.
- Reliable Mechanical Alignment: Features a non-mechanical seat-to-disc alignment that eliminates the risk of the valve "freezing" in the closed position.
- Standardized Fit: 1-1/2" NPT female inlet and outlet connections provide seamless integration into existing ASME boiler pressure relief piping.
Is the Watts 0383793 suitable for steam boilers?
No, this valve is specifically designed for hot water heating boilers and liquid-based hydronic systems. While it has a high BTU steam discharge rating for safety relief, it should not be used as a primary steam safety valve.
What causes a relief valve to drip after a pressure spike?
Dripping is usually caused by sediment on the valve seat. The 374A series minimizes this with its raised seat design, but if debris is trapped during a discharge, the manual test lever should be operated to flush the waterways.
Can I install this valve in a horizontal orientation?
For optimal performance and to ensure the safety discharge functions correctly, it is recommended to install the valve in a vertical upright position as per ASME Section IV standards.
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.
