Float valve


Float valve

A float valve is a mechanical feedback mechanism that regulates fluid level by using a float to drive an inlet valve so that a higher fluid level will force the valve closed while a lower fluid level will force the valve open. This is an example of negative feedback and of proportional control.

The most common use of a float valve is to control the filling of water in the water tank (Cistern) of a commode (toilet).

This is done by utilizing a Balloon type float valve. Its working is thus:

A ball shaped hollow sphere , made of hardened Rubber or Copper alloy sheet is sealed so that water cannot enter it.This is attached to an arm that in turn is attached to the valve or flap.

The valve or flap controls the opening of the pipe through which water flows into the tank/Cistern

Under Empty condition, valve is fully open and balloon is suspended freely.

As water ingresses into the container, the balloon, on account of trapped air and buoyancy, begins to rise / float on the water surface.

Soon the balloon floats high enough so that the arm attached to the Balloon CLOSES the valve and stops water from flowing in.

Thus when water is filled to a certain level, its inflow is stopped by this arrangement.

ee also

*ballcock


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Look at other dictionaries:

  • Float valve — Float Float (fl[=o]t), n.[OE. flote ship, boat, fleet, AS. flota ship, fr. fle[ o]tan to float; akin to D. vloot fleet, G. floss raft, Icel. floti float, raft, fleet, Sw. flotta. [root] 84. See {Fleet}, v. i., and cf. {Flotilla}, {Flotsam},… …   The Collaborative International Dictionary of English

  • float valve — n. a valve regulated by a float …   English World dictionary

  • float valve — plūdinis vožtuvas statusas T sritis automatika atitikmenys: angl. float valve vok. Schwimmerventil, n rus. поплавковый клапан, m pranc. soupape à flotteur, f …   Automatikos terminų žodynas

  • float valve — noun : an automatic valve whose opening and closing are controlled by a float at the end of a lever * * * a valve admitting or discharging a liquid to or from a tank and regulated by a float on the surface of the liquid within the tank to… …   Useful english dictionary

  • float valve — a valve admitting or discharging a liquid to or from a tank and regulated by a float on the surface of the liquid within the tank to maintain a nearly constant height of liquid. [1870 75] * * * …   Universalium

  • float valve — noun a ball valve …   English new terms dictionary

  • float valve — Type of valve which is operated by sphere or pan which floats on liquid surface and controls level of liquid …   Dictionary of automotive terms

  • Float valve — (автоматический) поплавковый клапан, регулирующий уровень (краски) …   Краткий толковый словарь по полиграфии

  • float valve — /ˈfloʊt vælv/ (say floht valv) noun → ballcock …   Australian English dictionary

  • low-side float valve — Refrigerant control valve operated by level of liquid refrigerant in low pressure side of system …   Dictionary of automotive terms


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