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Xiamen Better Silicone Co.,Ltd is a famous China silicone valve factory and supplier with customized rubber valve, please feel free to contact us. Silicone Valve Silicone valve is including one-way valves and pressure relief valves such as duckbill valves and umbrella valves,etc.These bidirectional and one-way silicone valves could open and close at predetermined forces and vacuums and are used to dispense liquids, gases, and powders. One-way valve One-way valve components are used to create a unidirectional flow in a device. They are in fact elastomeric sealing el