Gate valve, stops or allows flow by raising or lowering a flat component that blocks flow when closed, Globe valve, controls flow by raising or lowering a component onto a seat inside the valve body, Ball valve, controls flow using a rotating sphere with a hole through the center, Plug valve, uses a rotating cylindrical or tapered component with a hole through it, Diaphragm valve, controls flow by pressing a flexible membrane down onto a seat to block fluid, Reducing valve, automatically lowers high inlet pressure to a lower, controlled outlet pressure, Pinch valve, controls flow by squeezing a flexible tube until it closes, Butterfly valve, uses a rotating disc inside the pipe to control flow, Needle valve, uses a long, pointed tip to precisely control small amounts of flow, Check valve, allows fluid to flow in one direction and automatically prevents backflow, Safety/relief valve, automatically opens when pressure becomes too high to protect equipment, Globe valve (diagram), , Gate valve (diagram), , Plug valve (diagram), , Ball valve (diagram), , Diaphragm valve (diagram), , Reducing valve (diagram), , Pinch valve (diagram), , Butterfly valve (diagram), , Needle valve (diagram), , Check valve (diagram), , Safety/Relief valve (diagram), .

Valve Types

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