Electromagnetic (solenoid) valves for air and water of the 1901R-ABN series are designed for installation on a pipeline in order to block the flow of a working medium (water, air, propylene glycol, etc.). In the initial state, the valve is open, it is enough to apply voltage to the electromagnetic coil to close the valve.
The valves of the 1901R-ABN series are indirect valves with a floating diaphragm. The advantage of electromagnetic valves of this design compared to direct-acting valves is the low energy consumption of the coil while maintaining high flow rates and operating pressure. However, for the correct operation of indirect solenoid valves, the available pressure drop between the valve inlet and outlet must be at least 0.5 bar (ΔPmin = 0.5 bar). If the available pressure drop is less than 0.5 bar, then the flow rate of the working medium through the valve will be significantly lower than the nominal one.
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