POA suction throttling valve

A term standing for "pilot operated absolute" and is a modification of a suction throttling valve which has a metal bellows with a vacuum instead of a diaphragm; it provides more accurate evaporator pressure control, allowing for lower evaporator temperatures without cone icing

Dictionary of automotive terms. 2015.

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  • suction throttling valve — (STV) A backpressure regualted valve on some Ford and GM systems placed between the air conditioning evaporator and compressor which controls evaporator pressure to provide maximum cooling without icing evaporator core. See POA suction throttling …   Dictionary of automotive terms

  • throttling valve — See POA suction throttling valve suction throttling valve (STV) and evaporator pressure regulator valve (EPR). suction throttling valve …   Dictionary of automotive terms

  • suction throttling — See poa suction throttling valve …   Dictionary of automotive terms

  • valve — A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. There are many different types. See ABS relay valve accumultor valve air valve carburetor air control valve air gulp valve …   Dictionary of automotive terms

  • throttling — [1] Reducing the power output of an engine by closing the throttle, thus restricting airflow through the carburetor or intake tract. [2] Expansion of gas through orifice or controlled opening without gas performing any work as it expands. See poa …   Dictionary of automotive terms

  • suction — See negative suction head POA suction throttling valve vacuum …   Dictionary of automotive terms

  • pilot operated absolute valve: (POA) — A suction throttling device used on some GM and Ford air conditioner system …   Dictionary of automotive terms

  • valves-in-receiver unit — (VIR) a component used on GM system, in which the thermostatic expansion valve, POA suction throttling valve, the receiver drier, and, if equipped, the sight glass are all combined into one assembly …   Dictionary of automotive terms

  • absolute — A conic (a quadric in three dimensions) formed by the assemblage of the points at infinity on a line (in general two points). Its form determines the metrical properties of the geometrical system being operated. Thus in Euclidean geometry, the… …   Dictionary of automotive terms

  • pilot operated absolute — See POA suction throttling valve …   Dictionary of automotive terms

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