In accordance with a further aspect of the invention it can be provided that the valve body is adapted to be actuable by a piston which can be acted upon at both sides, wherein the piston is arranged in a piston housing and at least one chamber can be acted upon with a variable pressure by way of a control valve.Water Control valves A technically simple structure is afforded if the control valve is driven by a linear drive, for example a servomotor or voice coil motor, the linear drive being regulated in dependence on the signal from the pressure sensor. In that respect it has been found particularly advantageous if the control valve is in the form of a conical needle and is arranged in a communicating passage, by way of which the regulating medium is fed to the chamber.

The invention further seeks to provide an apparatus for the discharge over a large area of liquid media, in particular water, comprising a central liquid source, a liquid conduit system, a central control unit and electrical control lines to individual valves at a plurality of distributed discharge locations of the liquid conduit system.

Preferably the valve according to the invention is used in relation to a sprinkler or watering system in order to achieve precise controlled distribution of water.Water Power Control Valves With precision watering of that nature parameters measured for example by moisture or temperature sensors and/or satellite monitoring are analysed by the system and the necessary delivery of water is accordingly regulated differently with pinpoint accuracy and thus valuable water is saved.MULTI-FUNCTIONAL WATER PUMP CONTROL VALVE In addition a watering system equipped with such regulating valves according to the invention permits both the linear operation and also circular operation with the same nozzle equipment.

In order to be able to specifically switch individual nozzles on or off, in accordance with a further alternative configuration of the apparatus according to the invention it can be provided that at least a part of the valves can be individually continuously adjusted in respect of through-flow quantity and/or switched on/off, so that no additional valves with expensive and complicated solenoid control have to be fitted.

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2011-12-27

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