1.Item:Silicone tube valve 2.Material:Silicone,FKM rubber,Fkm-silicone,NBR 3.Certification:ASTM,DIN,SAE Silicone tube valve Itemsilicone tube valveBrandRAMISCountry of ... independen,variableopenin pressure trough seat thickness.FunctionAct as backflow prevention devices or one-way valves or check valves.Application Apply to ... according to ASTM, DIN, SAE,VDA6.1, UL, FDA, JIS . silicone tube valve