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  2. Valve stem - Wikipedia

    en.wikipedia.org/wiki/Valve_stem

    A valve stem is a self-contained valve that opens to admit gas to a chamber (such as air to inflate a tire), [1] and is then automatically closed and kept sealed by the pressure in the chamber, or a spring, [2] [3] or both, to prevent the gas from escaping.

  3. NAPA Auto Parts - Wikipedia

    en.wikipedia.org/wiki/NAPA_Auto_Parts

    The National Automotive Parts Association (NAPA, also known as NAPA Auto Parts), is an American retailers' cooperative distributing automotive replacement parts, accessories, and service items throughout North America. Established in 1925, NAPA is a division of Atlanta-based Genuine Parts Company.

  4. Schrader valve - Wikipedia

    en.wikipedia.org/wiki/Schrader_valve

    The Schrader valve consists of a valve stem into which a valve core is threaded. The valve core is a poppet valve assisted by a spring. A small rubber seal located on the core keeps the fluid from escaping through the threads. Using the appropriate tools, a faulty valve core can be immediately extracted from the valve stem and replaced with a ...

  5. Valve guide - Wikipedia

    en.wikipedia.org/wiki/Valve_guide

    In the 1980s, many U.S. production engine remanufacturers began reaming valve guides, rather than replacing them, as part of their remanufacturing process. They found that by reaming all the valve guides in a head to one standard size (typically 0.008 in. diametrically oversized), and installing remanufactured engine valves having stems that are also oversized, a typical engine head can be ...

  6. Poppet valve - Wikipedia

    en.wikipedia.org/wiki/Poppet_valve

    The valve stem D moves up to open the valve discs C. James Watt was using poppet valves to control the flow of steam into the cylinders of his beam engines in the 1770s. A sectional illustration of Watt's beam engine of 1774 using the device is found in Thurston 1878:98, [ 13 ] and Lardner (1840) provides an illustrated description of Watt's ...

  7. Dunlop valve - Wikipedia

    en.wikipedia.org/wiki/Dunlop_valve

    The Dunlop valve, (also called a Woods valve, an English valve or a Blitz valve [1]) is a type of pneumatic valve stem in use—mostly on inner tubes of bicycles—in many countries, including Japan, [2] Korea, India, Pakistan, Sri Lanka, most European countries, and a number of developing countries.

  8. Presta valve - Wikipedia

    en.wikipedia.org/wiki/Presta_valve

    The Presta valve (also French valve (FV) or Sclaverand valve) is a type of tire valve commonly found on high pressure bicycle inner tubes and is commonly used on tubeless setups. It consists of an 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.

  9. 2002 NAPA Auto Parts 500 - Wikipedia

    en.wikipedia.org/wiki/2002_NAPA_Auto_Parts_500

    The 2002 NAPA Auto Parts 500 was a NASCAR Winston Cup Series stock car race held on April 28, 2002 at California Speedway in Fontana, California. Contested over 250 laps on the 2-mile (3.23 km) asphalt D-shaped oval, it was the tenth race of the 2002 Winston Cup Series season .

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