Watts 315M2 Steam Safety Relief Valve

Watts 315M2 Steam Safety Relief Valve protects low-pressure steam boilers and process equipment from overpressure with a precise 15 PSI set point. This steam safety relief valve features a durable bronze body, a stainless steel spring, a metal seat, and a non-stick PTFE disc for reliable performance and long life. Inlet and outlet are both 3/4 inch, with end connections that are male-threaded x female-threaded to fit common piping configurations.

Built for ASME HV and NB compliant systems, the 315M2 delivers high-capacity discharge while ensuring positive shut-off and safe maintenance. The seat is located above the drain to minimize debris interference and simplify drainage during service. This valve is ideal for low pressure steam boiler and process equipment, offering robust protection, repeatable operation, and easy installation across industrial applications.

• 3/4" inlet and 3/4" outlet with male-to-female threaded end connections
• Bronze body with stainless steel spring for corrosion resistance
• Metal seat and non-stick PTFE disc for reliable sealing
• Set pressure of 15 PSI for safe low-pressure steam protection
• High capacity discharge up to 375 lb/hour
• Positive shut-off and seat located above drain for safe maintenance
• ASME HV and NB compliant