What is the main valve?
The main valve is an electrically operated automatic valve, which is often installed near the main inlet of the irrigation system. This device is usually connected to a specific circuit located in the irrigation system control panel. This circuit opens the main valve whenever the specific zone valve is open and then closes it when the zone valve is no longer open. The primary purpose of the main valve is to prevent unnecessary water loss from leaking zone valves. Most of the irrigation system control panels have a special built -in circuit for this purpose.
The typical lawn irrigation system will often have several different zone valves that operate a specific group of sprayers. During the irrigation cycle, the system control unit usually turns on the valve of one zone at the same time to irrigate a particular area of the courtyard. When the main valve is used in the irrigation system, it is opened by a regulator at the same time when the first valve of the zone is open, and then Cznov has warmed sweatWhat all areas of the courtyard were connected. The main valve is usually the same type of valve, which is used as a zone valve, except that it is installed upstream from zone valves as a type of measures of safe failure in case of subsequent current leakage.
Some irrigation systems use other devices to further reduce the possibility of water loss caused by escape zone valves and sprayers. This device is known as the flow sensor and is able to indicate the controller to turn off the water supply whenever the leak is detected. In this particular type of configuration, the driver is able to remember the use of water in each valve zone using information provided by the flow sensor. In the case of leakage, the flow sensor will show an increase in the use of water, which stimulates the controller to turn off the water supply using the main valve.
Using the main valve at irrigation -system can ever allow leaksunnoticed for a long time. Because most lawn irrigation systems usually work late at night, often no one is present to notice that the system is escaping. The day around the people around, the leak does not notice again, because the main valve closed the water supply to it. The use of this type of valve in the irrigation system can also cause premature failure of certain types of plastic pipes. This failure is usually the result of frequent stretching and contracts that occur every time the valve is open or enclosed.