Watts 0274428 174A Series, 3/4" NPT Female Connection, 20 PSI Max, 30-150 PSI Range, Pressure Relief Valve

This boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The standard pressure setting is 30psi (206.9 kPa), Pressure Range: In 5psi (34.5 kPa) increments from 30 to 150psi (2 to 10 bar) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.

Features:
Bronze Body Construction
Standard pressure relief setting 30 psi
Bronze body
For hot water heating and supply boilers

Specifications:

Manufacturer: Watts
Manufacturer Part Number: 0274428
Product Type: Pressure Relief Valve
Body Material: Bronze
Inlet Connection Size: 3/4"
Inlet Connection Type: Female Threaded
Inlet Thread Type: NPT
Lead Free: NO
Maximum Working Pressure: 20 PSI
Outlet Connection Size: 3/4"
Outlet Connection Type: Female Threaded
Outlet Thread Type: NPT
Pressure Range: 30 to 150 PSI
Pressure Relief Setting: 30 PSI
Series: 174A
Dimensions: 2.7" x 5.95" x 2.45"
Weight: 1.1 lb

Tech Sheet