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2. Needle valve - Wikipedia

   en.wikipedia.org/wiki/Needle_valve

   Needle valves are also commonly used to provide shut off for the pressure gauge or on applicators to shut off the supply of NH3 to the knives in anhydrous ammonia (NH3) applications. [2] Since flow rates are low and many turns of the valve stem are required to completely open or close, needle valves are not used for simple shutoff applications.

3. Isolation valve - Wikipedia

   en.wikipedia.org/wiki/Isolation_valve

   Vent and drain valves are examples of normally closed valves which are only opened when required to depressurise (vent) or drain fluids from a system. Isolation valves must effectively stop the passage of fluids. [4] Gate valves, ball valves and plug valves are generally considered to provide tight and effective shut-off. Globe valves and ...

4. Globe valve - Wikipedia

   en.wikipedia.org/wiki/Globe_valve

   With a smooth stem the ends are threaded to allow connection to the plug and the actuator. The stem must not only withstand a large amount of compression force during valve closure, but also have high tensile strength during valve opening. In addition, the stem must be very straight, or have low run-out, in order to ensure good valve closure ...

5. 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.

6. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Compression connectors on an isolating valve; the reddish part is a copper compression ring Compression fittings (sometimes called "lock-bush fittings") consist of a tapered, concave conical seat; a hollow, barrel-shaped compression ring (sometimes called a ferrule); and a compression nut which is threaded onto the body of the fitting and ...

7. Experts Say There Is in Fact a ‘Best’ Temperature for Sleep

   www.aol.com/experts-fact-best-temperature-sleep...

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