1.Stainless steel Sanitary Welded Check Valve 2.SS304,SS316,SS316L,CF8M,or required 3.ISO,DIN,SMS,3A,IDF Stainless Steel Sanitary Welded Check Valve 1.Size: 3/4"~4"(DN15~DN100) 2.Material: Stainless Steel 304 Or 316L 3.Standard: GB, IDF, ISO, DIN, 3A4.Flux control of pipelines:DN15-DN100&1"-6"5.Connection code:welded/threaded/clamped/union6.Processing: a little giant CNC Machine7.Working ...