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  2. Air-operated valve - Wikipedia

    en.wikipedia.org/wiki/Air-operated_valve

    Three-way valves may be used in pairs to operate a double-acting cylinder, thus replacing a four-way valve. A primary function of the 3-way valve is to save/store air that's compressed in high cyclic applications. 4-way valves are used for systems that require higher air pressure. [3] Four-way valves are the most commonly used components for ...

  3. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Valves can be categorized into the following types, based on their operating mechanism: Ball valve, for on–off control without pressure drop. Ideal for quick shut-off, since a 90° turn completely shuts off, compared to multiple 360° turns for other manual valves; Butterfly valve, for on–off flow control in large diameter pipes

  4. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Air filter: Funnel or tundish: Steam trap: Viewing glass Pressure reducing valve: Valve: Gate valve: Control valve: Manual valve Check valve: Needle valve: Butterfly valve: Diaphragm valve: Ball valve: Check valve: Back draft damper Bag Gas bottle: Globe valve: 3-way valve Piston or reciprocating compressor: Relief valve: Rupture disc ...

  5. Valve - Wikipedia

    en.wikipedia.org/wiki/Valve

    Schematic 3 way ball valve: L-shaped ball right, T-shaped left. Valves with three ports serve many different functions. A few of the possibilities are listed here. Three-way ball valves come with T- or L-shaped fluid passageways inside the rotor. The T valve might be used to permit connection of one inlet to either or both outlets or connection ...

  6. Solenoid valve - Wikipedia

    en.wikipedia.org/wiki/Solenoid_valve

    A 3-way valve has 3 ports; it connects one port to either of the two other ports (typically a supply port and an exhaust port). The solenoid valve (small black box at the top of the photo) with input air line (small green tube) used to actuate a larger rack and pinion actuator (gray box) which controls the water pipe valve

  7. Valve actuator - Wikipedia

    en.wikipedia.org/wiki/Valve_actuator

    The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...

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