The zone valves perform the function of automatically shutting off the flow of the medium distributed to the system.
Complete with insulation, they are ideal for application in air-conditioning systems, characterized by particularly low working temperatures of the thermal medium with consequent condensation build-up.

The motorised ball valves are used in air-conditioning systems also thanks to the following features:
- possibility of being installed upside-down;
- possibility of being opened and closed thanks to the manual control lever on the actuator;
- no seepage;
- short operating times (valve opening/closing);
- operation with high differential pressures;
- low head losses.
 
 
 
 
 
 
Operating principle
Ambient temperature control in air-conditioning systems.
The increase in ambient temperature, in the summertime, causes the contacts of the room thermostat to close and the resulting electric supply of the actuator that drives the valve opening.
The circuit is thus supplied with refrigerated water and the zone is air-conditioned.
When the desired ambient temperature is reached, the thermostat causes the contact to open with the valve closing as a result.
The room thermostat, usually used also for the wintertime, must be the type with two positions (ON/OFF) and must be designed for the WINTER/SUMMER switchover.
 
 
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