What is a Piston valve?

A piston valve is a type of flow control valve that controls the flow rate of fluid (liquid, gas, etc.) that flows through pipes, etc., by adjusting or completely blocking the flow. The relationship between the intake port and the exhaust port of a 2-cycle engine is also considered to be a kind of piston valve, and although the opportunity to use it has decreased in recent computerization, the carburetor of the gasoline engine also uses the principle of the piston valve. In addition, brass instruments (such as trumpets) also change the pitch by changing the air flow with a piston valve.

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