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Water flow controller is designed for automatically maintaining the specified water flow rate [m³/h] at the installation site. The stable water flow is maintained by partially closing the flow with the valve. The constant flow water controller operates without external power sources.
Principle of operation of the water flow controller is based on maintaining a stable pressure difference across the valve with a fixed hydraulic resistance. A constant pressure difference across the valve ensures a steady water flow through it. The water flow remains constant regardless of fluctuations in the absolute pressure in the pipeline.
The automatic water flow controller combines two devices – a balancing valve and a differential pressure regulator, whose impulse tubes are connected before and after the balancing valve.
In water flow controllers capable of maintaining a range of flow rates, the hydraulic resistance of the valve changes during adjustment.
During operation, the controller’s shut-off element may be fully or partially open.
Constant flow water controllers of this design are also called 'self-acting regulators' because the valve shut-off element moves without external power sources.
Proportional regulators are named so because the speed and degree of movement of the valve shut-off element are proportional to the speed and degree of deviation of the flow rate at the installation site.
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