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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