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A valve stem is a self-contained valve that opens to admit gas to a chamber (such as air to inflate a tire), and is then automatically closed and kept...

the stem (see below) passes and that forms a guide and seal for the stem. The bonnet typically screws into or is bolted to the valve body. Valve bodies...

known as a valve stem. The working end of this plug, the valve face, is typically ground at a 45° bevel to seal against a corresponding valve seat ground...

outer valve stem and an inner valve body. A lock nut to secure the stem at the wheel rim and a valve cap may also be present. The Sclaverand valve was invented...

Schrader valve design was invented in 1891, and patented in the United States in 1893. The Schrader valve consists of a valve stem into which a valve core...

The Dunlop valve, (also called a Woods valve, an English valve or a Blitz valve) is a type of pneumatic valve stem in use—mostly on inner tubes of bicycles—in...

Examples: globe valve, angle valve Sliding stem: The valve stem / plug moves in a linear, or straight line motion. Examples: Globe valve, angle valve, wedge type...

change evenly with stem travel. Depending on the construction, a partially open gate can vibrate from the fluid flow. Gate valves are mostly used with...

screwed in to close (or shut) the valve. The plug is also called a disc. In globe valves, the plug is connected to a stem which is operated by screw action...

mechanism attached to the valve stem. Power-operated actuators, using gas pressure, hydraulic pressure or electricity, allow a valve to be adjusted remotely...

that are integral with the valve stem can suffer from corrosion. Metallic valve caps can become seized to their valve stems due to galvanic corrosion and...

The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway...

simple needle valves are often used as bleed valves in water-heating applications. Unlike a ball valve or valves with a rising stem, it is not easy...

washer against the stem. Isolation valves can be in the normally open position (NO) or normally closed (NC). Normally open valves are located between...

puncturing of the tire a flat can be caused by: failure of or damage to the valve stem; a nail in the tire; rubbing of the tire against the road; ripping of...

A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance...

diameter of the poppet valve stem is critical for the proper performance of an engine. If there is too little clearance, the valve may stick as oil contaminants...

Valve stem: Pneumatic tires receive their air through a valve stem—a tube made of metal or rubber, with a check valve, typically a Schrader valve on...

A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to...

plug when the valve is open. Plug valves are simple and often economical. When the plug is conically tapered, the stem/handle is typically attached to the...