... :DN25-1000mm 2.Pressure: PN1.0-16.0MPa 3.Material:WCB,WC6,CF8,CF8M,CF3,CF3M API6D ISO9001 ... .Size:DN25-1000mm2.Pressure: PN1.0-16.0MPa 3.Material:WCB,WC6,CF8,CF8M,CF3,CF3M LCB,LC3 ... valves only,able to lightly open and close valves.3.The seat ring uses the sealing face inlaid witn ... metal seal,there is grease injector outside of it,grease gets into the sealing face through the injector and the seat ring ...