An umbrella valve is a type of one-way check valve that controls the flow of fluid (either liquidor gas) within a system. It's designed to open and close based on differential pressure.

The design of an umbrella valve includes a dome-shaped (like an umbrella) elastomercomponent. Under normal conditions, the 'umbrella' part of the valve is closed, providing atight seal to prevent backflow.When the pressure beneath the umbrella exceeds the pressure above it, the umbrella flexesor lifts, allowing fluid to flow around its edges and onward through the system. When thepressure above the umbrella increases, or the pressure beneath it decreases, the umbrellareseals, preventing backflow. The unique design of umbrella valves makes them particularly useful in systems where space is at a premium, as they can provide reliable performance in a compact size. Furthermore, since they don't require springs or other complex mechanisms to operate, theycan also offer greater reliability and less maintenance than other types of valves.

Umbrella valves can be made from a variety of materials, but silicone is a common choicedue to its flexibility, durability, and ability to maintain a tight seal over a wide range of temperatures and pressures, Other possible materials include various types of rubber andplastic.

Applications for umbrella valves can be found in many different industries, includingmedical. automotive, and consumer goods, For example, they might be used in ventilationsystems, fuel tanks. medical devices, and small engines.