Silicone rubber umbrella valve is made of silicone or rubber material, It is one type of silicone rubber valve, Which has round diaphragm seal with a stem and hook to keep on assembly part. It is also called mushroom valve. Umbrella valve is usually used as air or water pressure relief valve. Umbrella valve is needed to assembly plastic part or metal part to play a valve function. Those silicone umbrella valves are widely used in medical device, health care, automotive, home appliance, water handle, aquarium, feeding Pets food process equipment etc.