... valvesStructure: Brass Body, brass bonnet, brass ball, brass stem Seal ring P.T.F.E, O-ring N.B.R, steel handle with plastic cover ... ",1/2"Testing pressure: 0.6-0.8mpa TEM:0<T<90Threaded ISO228/1.Applicable medium: Water, oil, gas.Package: 1 ... accord with ISO9001 management ,regular checking on line from production in each workshops , we are able to provide you Test Certificate ...