Assembly and adjustment of electric valve controller Common problems Electric valve maintenance

Assembly and adjustment of electric valve controller Common problems Electric valve maintenance

The key to the installation and adjustment of electric valve controller should pay attention to the following aspects:
1. Assemble and fix it according to the specifications of the purchased product. The grounding device terminal on the back plate must be based on the grounding device.
2. The circuit schematic number of the control board and the electric device is the same, and the control module and the electric device are connected with each other by the cable according to the same terminal number. If the user does not use on-site control, terminals 12, 13 and 14 are not connected. Electric valve control board is used for automatic control system, 12, 13, 14 terminals are used for “remote switch”, “automatic off” matching signal power input terminals.
3. Press and hold the lock screen key, the indicator will light up, the remote control power switch on the spot will turn to remote control, and the remote control display will light up.
4, use the hand wheel to open the valve to 50% open degree, hold down the open valve or close the valve key, check whether the rotation of the valve and the function key is consistent, if not consistent immediately press the stop key, disconnect the three-phase power supply, replace the three-phase power supply in the random two phase.
5. Press and hold the open valve key, when the valve is opened in time, the open valve display light on the front plate; Press and hold the close valve key, when the valve is closed in time, the close valve display light in the front plate; When the valve needs to be terminated when it is open or closed, press the stop button to terminate the valve. Connect terminals 4 or 7 and the accident light in the front panel is on.
6. When the valve is in the fully open position, adjust the adjusting resistor in the front plate so that the opening meter indicates 100%.
7, the spot remote control power switch deviation on the spot, the spot display light, short circuit fault No. 12 or 13 terminal, valve and open operation, for the start of the situation; Short circuit fault No. 12 or No. 14 terminal, valve to close to operate, for startup condition.
8. Fuse tube on rear plate 5 x 20 A.
Electric valve maintenance Daily electric valve maintenance
Daily electric valve maintenance
1, the electric valve should be stored in the dry ventilation room, both sides of the channel must be blocked.
2, long-term storage of electric valves should be regularly maintained, waste, and in the production and processing surface coated with rust prevention agent.
3. After installation, safety inspection should be carried out frequently. Key inspection items:
(1) Surface wear.
(2) trapezoidal thread wear of valve seat and stem nut.
(3) The filling material is not outdated and invalid, if there is damage should be replaced regularly.
(4) After the maintenance and installation of the electric valve, the sealing performance test should be done.
Electric valve in operation, all kinds of valve parts should be complete and intact. Flange screw and support on the anchor bolt is essential, the external thread should be intact, not allowed to fall off. The tightening nut in the handwheel should be tightened in time if it is found loose to avoid damage to the contact or loss of the handwheel and factory nameplate. If the hand wheel is lost, it is not allowed to replace it with a adjustable wrench, and it must be fitted in time. Packing gland is not allowed to tilt or there is no torque gap. Easy to rain and snow weather, dust, dust and other dirty environment of the electric valve, its seat to assemble protective cover. The standard in the electric valve should be kept detailed, precise and clear. The seal, backboard and pneumatic accessories of the electric valve should be fully intact. No dents or cracks shall be allowed in the thermal insulation clip.
Do not knock, sit or support lifts on operating electric valves; In particular, non-metallic electric valves and cast iron electric valves should be strictly prohibited.