Watts 0364200 Valve

The Watts 0364200, also identified as the Model 415-1 1/2, is a high-capacity ASME Section IV safety relief valve specifically engineered for low-pressure steam heating boilers and industrial process equipment. This 1.5-inch NPT male inlet by 2-inch NPT female outlet valve is essential for maintaining system integrity in saturated steam applications. Constructed with a heavy-duty bronze body and a corrosion-resistant stainless steel spring, it is factory set to 15 psi to provide precise over-pressure protection. Its top-guided stem and non-stick PTFE disc-to-metal seat ensure a positive shutoff, minimizing steam loss and preventing seat leakage after discharge. With a certified steam discharge capacity of 1,860 lbs/hr at the 15 psi set point, this valve is a direct replacement for Watts 415-2-15 and 415-1 1/2 configurations. It is ideally suited for steam cleaning equipment and commercial pressure cookers where reliable, low-pressure relief is mandatory.

• High Flow Capacity: Delivers an ASME certified 1860 PPH steam discharge at 15 psi for rapid pressure relief.
• Superior Seating: Features a non-stick PTFE (Teflon) disc that prevents sticking and ensures a tight seal after every cycle.
• Industrial Durability: Rugged bronze construction and a stainless steel spring provide longevity in harsh steam environments up to 250°F.
• Simplified Installation: Designed with a standard 1-1/2" male NPT inlet and a 2" female NPT outlet for straightforward contractor retrofits.
• Field Proven: Trusted for low-pressure steam heating applications, meeting strict ASME Section IV safety standards.

Is the Watts 0364200 compatible with my existing heating boiler?
This valve is designed for ASME Section IV low-pressure steam boilers. If your system requires a 15 psi set point and utilizes a 1.5" inlet, this is the standard industrial-grade solution. Always verify that the 1,860 lbs/hr discharge capacity meets or exceeds your boiler's BTU output rating.

Can I use this valve for water pressure relief?
The Series 415 is specifically rated for saturated steam service. For hydronic water heating applications, an ASME Section IV water relief valve should be selected instead to ensure proper volumetric flow and safety compliance.

What is the difference between 0364200 and the 415-2-15?
They are the same technical component. 0364200 is the specific Watts ordering code, while 415-2-15 refers to the series, outlet size (2"), and pressure setting (15 psi).

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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.