First – pump automatic watering systems should provide the pressure on entering the pipeline system approximately equal to 4.5 atmospheres – only under such pressure can ensure high quality irrigation watering the entire area. The second – the pump for the automatic watering must be equipped with automatic controls for self-activation and deactivation. Third – if the pump is automatic watering system is located outside the premises ottaplivaemogo, it should simply be mounted and dismounted. The fourth – the price of the pump should vary within reasonable limits. Thus, we concluded that the best option for the system avtopoliva site can only be a pumping station. What is a pump station? This technologically fairly complex device consisting of a self-priming pump, membrane pressure tank and automatic controller. That the pump is designed to lift water from a clear to everyone, which also need other components? Pressure vessel is required to maintain a constant pressure, as it is used as an additional water tank, which eliminates the frequent inclusion of the pump with a short work, such as hand washing or set into a glass of water. Automation unit allows connection and disconnection of the pump when you start the next cycle of irrigation.
In practice, this is as follows, remote control system provides automatic watering solenoid valve. The pressure in the automatic watering system is falling sharply. When the pressure drops below 2 bar pressure and the relay is switched on the pump. The pumping unit is switched on and connected via pipeline starts to pump water from the source system avtopoliva, while maintaining the necessary systems for automatic watering pressure. Also, a pumping station can be automatically activated by the sensor flow at a rate of more than 1.2 l / min, with a decrease in consumption less than 1.2 l / min work station stops, thereby minimizing the frequent inclusion of off-pump motor, which is accompanied by a sharp surge overload. As noted in other articles of our site, the pump should be protected from the so-called "dry run". This situation usually occurs in water sources, which are very small debit (debit of water source – the amount of water that filled the well or wells at a time).
In the absence of water in the pump casing is no additional cooling, which leads to failure of bearings, mechanical seal, and, therefore, the motor pump. In pumping stations for the automatic watering system provided a constructive flow switch, which is when a "dry run" automatically suspend the operation of the pump. Also provide an access enable or disable the motor thermal overload pumping station or clogged. If there has been clogging the pump and periodically triggered protection the pump will be re-run every 30 minutes. For quality parts and protection of workers indoor unit pump when disconnecting from the water hammer, pump unit for automatic watering system fitted with a reflux valve.