740-1-40# 1600000 1X1.25

Spring loaded Soft seated Iron body Automatic reseating Inlet Connection Size 1" Outlet Connection Size 1-1/4" Pressure Range 30 to 75 PSI Pressure Relief Setting PSI 40 Series 740 This 1 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 a 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 40 psi (2.76 bar) with corresponding steam pressure discharge capacity up to 1,240,000 BTU/hr.