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  2. Siphon - Wikipedia

    en.wikipedia.org/wiki/Siphon

    An anti-siphon valve is also required here to prevent pressure drops in the water supply line from suctioning water out of the toilet tank (which may contain additives such as "toilet blue" [53]) and contaminating the water system. Anti-siphon valves function as a one-direction check valve. Anti-siphon valves are also used medically.

  3. List of General Motors factories - Wikipedia

    en.wikipedia.org/wiki/List_of_General_Motors...

    Located at 2100 Bristol Road. Located just to the south of Flint Truck Assembly and on the east side of Flint Metal Center. Flint Metal Center: Flint, Michigan: United States: Sheetmetal stampings for various GM models: 1954 Located at G-2238 Bristol Road. Located just to the south of Flint Truck Assembly and on the west side of Flint Engine South.

  4. Denison Hydraulics - Wikipedia

    en.wikipedia.org/wiki/Denison_Hydraulics

    Denison Hydraulics is a publicly traded U.S.-based company (Stock Symbol:DENHY) that manufactures industrial hydraulic fluid power systems (hydraulic pumps, motors, valves and engineered systems [1]) and components and is headquartered in Marysville, Ohio. Denison is owned by Parker Hannifin.

  5. Relay valve - Wikipedia

    en.wikipedia.org/wiki/Relay_valve

    A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...

  6. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

  7. Vacuum valve - Wikipedia

    en.wikipedia.org/wiki/Vacuum_valve

    Vacuum valve may refer to: Trickle valve, a type of airlock; Vacuum breaker, an anti-siphon valve; Vacuum delay valve, an automobile component; Vacuum tube, an electron tube or thermionic valve; Vacuum interrupter, an electrical device acting similar to a circuit breaker, used in higher voltage applications

  8. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  9. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Choke valve, Butterfly valve used to limit air intake in internal combustion engine. (Not to be confused with choke valves used in industrial flow control, above.) Clapper valve: a type of check valve used in the Siamese fire appliance to allow only one hose to be connected instead of two (the clapper valve blocks the other side from leaking out)