First, electric valves are usually composed of electric actuators and valves. The electric valve uses electric energy as power to drive the valve through the electric actuator to realize the switching action of the valve. Thereby achieving the switching purpose of the pipeline medium.

The solenoid valve is a kind of electric valve; the magnetic field generated by the electromagnetic coil is used to pull the valve core, thereby changing the opening and closing of the valve body, the coil is de-energized, and the valve core is returned by the pressure of the spring. Analog adjustment for pipe media flow in liquid, gas and wind systems is AO control. Gongliang valve can also be used for two-position control of electric valve in the control of large valve and wind system.

Second, electric valve operation precautions 1, start, confirm the clutch handle in the corresponding position 2, if it is in the control room to control the electric valve, the transfer switch to the large REMOTE position, and then through the SCADA system to control the electric valve switch. 3. If manual control is made, turn the transfer switch to the LOCAL position and operate the switch of the electric valve on the spot. When the electric valve is opened or closed, it will automatically stop working. Finally, the running change switch will be hit to the middle position. 4. When using the valve in the field, the valve opening and closing instruction and the valve stem operation should be monitored. The valve opening and closing degree should meet the requirements. 5. When using the on-site operation to fully close the valve, before the valve is closed, stop the electric shut-off valve and use the micro-motion to close the valve. 6. For the valve after setting the stroke and over-torque controller, when fully opening or closing the valve for the first time, it should pay attention to monitor the control of the stroke. If the valve switch does not stop at the position, it should be manually stopped immediately. 7. During the process of opening and closing the valve, if it is found that the signal indicator light is wrong and the valve has abnormal noise, it should be stopped and checked in time. 8. The power of the electric valve should be turned off after the operation is successful. 9. When operating multiple valves at the same time, pay attention to the operation sequence and meet the production process requirements.

Third, the electric valve in operation, all kinds of valve parts should be complete and intact. The flange threads and the bolts on the bracket are indispensable, the threads should be intact and no looseness is allowed. The tightening nut on the hand wheel should be tightened if it is loose, so as not to wear the joint or lose the handwheel and nameplate. If the handwheel is lost, it is not allowed to replace it with a wrench. It should be timely. The packing gland is not allowed to be skewed or has no pre-tightening clearance. For electric valves in environments that are susceptible to contamination by rain, snow, dust, sand and other contaminants, the valve stem should be fitted with a protective cover. The scale on the electric valve should remain complete, accurate and clear. The lead seals, caps and pneumatic accessories of electric valves should be completed. The insulation jacket should be free from dents and cracks. It is not allowed to hit, stand or support heavy objects on an operating electric valve; especially non-metallic electric valves and cast iron electric valves are prohibited.