Product Name: Brass Safety Valve, Brass Brass Relief Valve for Water Heater Model NO.: ES 16-05 Material: Brass Structure: Spring Closed: Semi-Closed Pressure: Adjustable Connection: Thread Temperature: Ordinary Temperature Certification: CCC, ISO, CE Media: Water Trademark: EVERSTAR Transport Package: Each One in a Poly Bag, Then 200 Pieces/Carton. Specification: 1/2 inch, 3/4 inch Origin: China HS Code: 8481400000 Product Description Description:Brass safety relief valve,safety pressure reducing valves are used for security of heating or hot water systems.The safely valve is used to discharge the pressure when the fixed valve is overpassed.When the heating system pressure exceeds the safety value,the safety valve opens, part of the steam would be out, the system pressure does not exceed the allowable value, thus ensuring the system works in a safe level.SPEC.1,Material: Brass body(CuZn39Pb3, CZ121, C37710, CW614N, CW617N, DZR,etc)2,Size: 1/2", 3/4"3,Thread:BSP,NPT,etc4,Surface: Natural brass or nickel plated ro chrome plated.5,Working Temperature: -20ºC-150ºC6,Testing Pressure: 100% tested with 0.6MPa - 0.8MPa by air.Package,each in a poly bag,then 200 pieces/carton