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2. 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 ...

3. Level control valve - Wikipedia

   en.wikipedia.org/wiki/Level_control_valve

   A level control valve or altitude control valve is a type of valve that automatically responds to changes in the height of a liquid in some storage system. A common example is the set of ballcocks in a flush toilet , where each stage of the flush cycle is actuated by the emptying or filling of the tank.

4. List of abbreviations in oil and gas exploration and production

   en.wikipedia.org/wiki/List_of_abbreviations_in...

   AAV – Annulus access valve; ABAN – Abandonment, (also as AB and ABD and ABND) ABSA – Alberta Boilers Safety Association; ABT – Annulus bore test; ACC – Air-cooled heat condenser; ACHE – Air-cooled heat exchanger; ACOU – Acoustic; ACP – Alkali-cosolvent-polymer; ACQU – Acquisition log; ACV – Automatic control valve

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Such a system contains a boiler, furnace, or heat pump to heat water, steam, or air in a central location such as a furnace room in a home, or a mechanical room in a large building. The heat can be transferred by convection, conduction, or radiation. Space heaters are used to heat single rooms and only consist of a single unit.

6. Safety valve - Wikipedia

   en.wikipedia.org/wiki/Safety_valve

   An oxygen safety relief valve DN250-safety valves. A safety valve is a valve that acts as a fail-safe.An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits.

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