What is a Poppet Valve?
A poppet valve is a valve typically used to control the timing and quantity of gas or vapor flow into or out of an engine but with many other applications.
It consists of a hole or open-ended chamber, usually round or oval in cross-section, and a plug, usually a disk shape on the end of a shaft known as a valve stem.
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How do I identify a poppet valve?
Poppet valves are usually made up of a flat disk of metal with a long rod, known as the valve stem. The stem is used to push down on the valve and open it, with a spring generally used to close it when the stem is not being pushed on.
What materials are used in poppet valves?
Usually, the poppet valve can be opened relatively quickly. The inlet valves are made from plain nickel, nickel chrome or chrome molybdenum.
Whereas exhaust valves are made from nickel chrome, silicon chrome steel, high-speed steel, stainless steel, high nickel chrome, tungsten steel, and cobalt chrome steel.
What type of valve is a poppet valve?
Two of the most common designs for pneumatic control valves are the poppet and the spool. A poppet valve consists of an orifice that is opened and closed by raising and lowering a sealing surface onto the orifice. It usually has an internal spring that holds the valve in the closed position.