Watts 740-2-30 Boiler Pressure Relief Valve

Boiler Pressure Relief Valve from Watts 740-2-30 delivers reliable protection for hot water heating boilers. This lever-type relief valve uses an iron body with a stainless steel spring and a metal seat paired with a non-metallic disc to ensure durable operation and precise discharge. Designed to meet ASME, NB, HV, MIL-V-18634B standards (Type I, Class 3A, Style B), it supports a wide range of boiler installations.

Key specs at a glance include a 2" inlet and 2-1/2" outlet with female threaded connections, set pressure of 30 PSI, and a system pressure rating from 30 to 75 PSI, all rated up to 250°F. The valve features a seat located above the drain, an expanded outlet, and a convenient test lever for maintenance checks. This unit is well-suited for hot water heating boilers with capacities from 925,000 to 10,700,000 BTU/hr.

• Type: Lever
• Inlet: 2" | Outlet: 2-1/2"
• End connections: Female threaded x Female threaded
• Body: Iron; Spring: Stainless steel; Seat: Metal; Disc: Non-metallic
• Set pressure: 30 PSI (range 30–75 PSI)
• Temperature rating: 250°F
• Application: Hot water heating boiler
• Includes: Test lever, expanded outlet, seat located above drain
• Standards: ASME, NB, HV, MIL-V-18634B Type I Class 3A Style B