Watts 0384242 Valve

The Watts 0384242, also identified as the Series 740-2-45, is a high-capacity ASME Section IV safety relief valve designed specifically for large-scale commercial hot water heating boilers. Featuring a 2" x 2.5" NPT connection, this valve is engineered with a bronze body and a non-metallic disc-to-metal seat, ensuring a positive shutoff and high resistance to sticking. It operates at a fixed set pressure of 45 PSI and provides an impressive discharge capacity of 7,067,000 BTU/hr. This HVAC safety valve utilizes a large orifice design for rapid pressure relief during overpressure events. Contractors frequently utilize the Watts 740 series for high-output systems where high-quality boiler pressure relief is critical for equipment protection and code compliance. The Watts 0384242 740-2-45 serves as a direct replacement for identical specifications, ensuring streamlined field installation and precise system integration for mechanical contractors managing large hydronic plants.

• Exceptional Relief Capacity: Rated at 7,067,000 BTU/hr to handle high-output commercial boiler systems.
• Durable Construction: Features a rugged bronze body and stainless steel springs for long-term reliability in demanding environments.
• Industry Compliance: Meets ASME Section IV requirements for steam and hot water heating boilers.
• Optimized Seating: The non-sticking, silicone disc ensures consistent HVAC valve performance and prevents premature leakage.
• Direct Compatibility: Exact replacement for Watts 740-2-45#, maintaining the footprint and 2" x 2.5" inlet/outlet orientation.

What is the discharge capacity for the Watts 740-2-45?
This specific model is rated for 7,067,000 BTU/hr at its 45 PSI set pressure, making it suitable for high-capacity commercial boiler applications.

Is the Watts 0384242 compatible with steam systems?
No, this ASME Section IV safety relief valve is specifically designed for hot water heating boilers. Always verify your specific media and pressure requirements before installation.

What size are the inlet and outlet connections?
The valve features a 2-inch NPT threaded inlet and a 2.5-inch NPT threaded outlet, allowing for proper discharge piping expansion.

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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.