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  2. 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.

  3. Multi-seat valve - Wikipedia

    en.wikipedia.org/wiki/Multi-seat_Valve

    Multi-seat valve with pneumatic actuator. Multi-seat valves, or multi-port valves, are used to shut off or control complex liquid flows in sterile areas in the beverage and food industry as well as in the fine chemical and pharmaceutical industry. Multi-seat valves often replace combinations of several single-seated valves in aseptic processing.

  4. Edmond's only city-owned pool is leaking thousands of gallons ...

    www.aol.com/edmonds-only-city-owned-pool...

    One pressing need, they recently learned, is fixing Edmond's popular Pelican Bay attraction — the only city-owned pool in town. The pool leaks water. A lot of water.

  5. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    A leak will give a similar result to permanent set, but will be detectable by holding the volume in the pressurised vessel by closing the inlet valve for a period before depressurising, as the pressure will drop steadily during this period if there is a leak. In most cases a permanent set that exceeds the specified maximum will indicate failure.

  6. Lennox Recalls Natural Gas Log Sets: Valves Can Crack, Leak Gas

    www.aol.com/news/2011-03-01-lennox-recalls...

    Lennox Hearth Products LLC recalled about 3,200 of its Lennox Shadowdance Natural Gas Log Set Burner Assemblies because the valve can crack and leak natural gas, said the U.S. Consumer Product ...

  7. 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 ...