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  2. Petcock - Wikipedia

    en.wikipedia.org/wiki/Petcock

    The most common application of a petcock in an automobile is as a drain valve [1] for a radiator. [2] Historically, petcocks were used on gravity-feed fuel systems found on automobiles. With universal adoption of fuel pumps they have all but disappeared in that application.

  3. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    There is a variety of manufacturers of these gauges, but most utilize either a three-valve or a five-valve design to test the RPZD in different ways. In the UK , [ 6 ] Illinois, New York , [ 7 ] Texas , [ 8 ] and Missouri ( RsMO 10c60-11 ), the RPZD valve must be tested at least every 12 months by an accredited tester.

  4. Thermostatic radiator valve - Wikipedia

    en.wikipedia.org/wiki/Thermostatic_radiator_valve

    A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.

  5. Hydronic balancing - Wikipedia

    en.wikipedia.org/wiki/Hydronic_balancing

    Larger buildings, such as offices or hospitals, have more complicated heating and cooling systems and require a more accurate balancing technique. To obtain a plant with the correct design flows, consultants design systems to include balancing valves, differential pressure controllers or pressure independent control valves.

  6. Automatic bleeding valve - Wikipedia

    en.wikipedia.org/wiki/Automatic_bleeding_valve

    Brass-bodied float valve. An automatic bleeding valve or air release valve (ARV) is a plumbing valve used to automatically release trapped air from a heating system. Air, or other gas, may collect within plumbing. For water delivery systems to taps and basins, particularly with good main supply pressure, this air is usually flushed through with ...

  7. Missing Girl, 17, Who Reportedly Left Home After Family ... - AOL

    www.aol.com/missing-girl-17-reportedly-left...

    Jennaleah “Jenna” Hin, 17, of Henderson, Nevada, was reported missing since Dec. 30 after she reportedly left home following a family dispute

  8. Valve leakage - Wikipedia

    en.wikipedia.org/wiki/Valve_leakage

    The importance of valve leakage depends on what the valve is controlling. For example, a dripping tap is less significant than a leak from a six-inch pipe carrying high-pressure radioactive steam. In the United States, the American National Standards Institute specifies six different leakage classes, with "leakage" defined in terms of the full ...

  9. Tesla Nears New All-Time Highs. What's Coming in 2025? - AOL

    www.aol.com/tesla-nears-time-highs-whats...

    In this week's video, I cover need-to-know news about Tesla (NASDAQ: TSLA) from the week of Dec. 2. Check out the short video to learn more, consider subscribing, and click the special offer link ...

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