Watts 0383542 740 Series, 30-75 PSI Range, 20 PSI Max, 1 1/2" NPT x 2" NPT, Iron Pressure Relief Valve

This 1 1/2 inch boiler pressure relief valve is used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of an iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It offers large discharge capacity, resists corrosive water conditions, resists 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 pressure relief is set at 30 psi (206.8 kPa) with corresponding high pressure ratings up to 2,900,000 BTU/hr.

Features:
Iron body construction
Set at 30 psi
Spring loaded
Automatic reseating

Specifications:

Manufacturer: Watts
Manufacturer Part Number: 0383542
Product Type: Pressure Relief Valve
Body Material: Iron
Inlet Connection Size: 1 1/2"
Inlet Connection Type: Female Threaded
Inlet Thread Type: NPT
Maximum Working Pressure: 20 PSI
Outlet Connection Size: 2"
Outlet Connection Type: Female Threaded
Outlet Thread Type: NPT
Pressure Range: 30 to 75 PSI
Pressure Relief Setting: 30 PSI
Series: 740
Dimensions: 10.1" x 6.55" x 4.9"
Weight: 6.97 lb

Tech Sheet