1、Ion exchange method: electro-pneumatic valves are used to control the brine in and out of the resin regeneration process, switching the direction of water flow, as well as controlling the automated operation of the system.
2. Membrane separation method: in the process of reverse osmosis or nanofiltration, electropneumatic valves are used to regulate the flow rate of feed water, drain water and concentrate water to ensure the stable operation of the system under different pressure and flow rate.
3. Electrochemical softening method: Electropneumatic valves can be used to control electrode cleaning, waste water discharge and the opening and closing of inlet and outlet water.
4. chemical precipitation method: electropneumatic valves are used to control the dosage of chemicals, the start and stop of the mixing process, as well as the discharge of precipitates.
5. biological method: in the biological reactor, electropneumatic valves are used to regulate the inlet and outlet water flow and gas supply to maintain the optimised conditions for biological treatment.