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...

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...

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...

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...

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...

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...

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...

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

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...

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...

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...

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...

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...

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

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...

onto valve stems of the wheels. The air inflation gauge displays the air pressure within the tire when the air hose is connected to the valve stem. The...

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...

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...

cylinder head above each eventual valve stem position, and then machining a conical-section surface into the valve seat that will mate with a corresponding...

valve or valve stem will quickly lead to failure, and often damage other parts such as pistons, cylinder walls, other valves, valve guides, and valve-train...

pressure is transferred to the valve stem, which is connected to either the valve plug (see plug valve), butterfly valve etc. Larger forces are required...

tight against the wheel. The internal beadlock is inflated via its own valve stem. The side of the beadlock closest to the tread, the "case", has a layer...

circular groove on the valve stem also locks the collet halves in place to the valve stem. To remove the valves from a cylinder head a 'valve spring compressor'...

multi-valve engines are an increase in manufacturing cost and a potential increase in oil consumption due to the greater number of valve stem seals....

point where the rocker contacts the valve stem. Friction may be reduced at the point of contact with the valve stem by a roller tip. A similar arrangement...

small cover used on the valve stem of a bicycle or car tire to prevent dust or other small particles from entering the valve and damaging it. Dustcaps...

affecting these engines are premature valve stem seal (nitrile rubber) failure, carbon buildup on the intake valves, and collapse of the oil control ring...