... ,silicone,FKM 3.Certification:ISO/TS16949,ASTM,DIN Umbrella Check Valve Item11.2mm Umbrella check ValveBrandRAMISCountry of OriginXiamen, ChinaItem No.RS70108Umbrella O.D11 ... .FunctionAct as backflow prevention devices or one-way valves or check valves.Application Used as vessel vent valves such as for ... , DIN, SAE,VDA6.1, UL, FDA, JIS . 11.2mm umbrella check valve