The electric valve does not operate
Thread Content
The electric valve handwheel can be rotated; an alarm is triggered after remote or local control is used to set the valve to a certain position, possibly due to excessive torque. Then the valve can’t move anymore. After power is cut off again, the alarm disappears, but not necessarily at a specific location. Why? What should I do?
(1) There might be stolen items stuck in the valve stem. (2) The filler card is too tight, so the motor cannot move it. It can be opened by hand-cranking. I have only encountered these two situations.
Over-torque is an alarm generated by the control circuit of the electric valve when it detects that the motor current is beyond the limit. There are two possible causes for over-torque: one is, as mentioned earlier, the presence of foreign objects stuck in the valve element, which prevents smooth opening and closing of the valve and thus triggers an over-torque alarm. The second possibility is that a short circuit in the motor coil causes an overcurrent; this can be roughly determined by checking whether the valve moves smoothly when manually operated, but it cannot be confirmed with certainty. After reporting the incident, they locked in their positions
After an alarm is triggered, the valve locks in place, so it cannot be operated; the alarm is cleared once the power is cut off.
Since it can be adjusted manually, it’s likely that your electric valve has a limit switch; the movement of that switch may cause it to indicate that it has reached the extreme position before it actually has
I don’t understand what this sentence means: “After power is cut off again, the alarm goes away, but not necessarily at the same location.” ”? ........
Over-torque is an alarm generated by the control circuit of the electric valve when it detects that the motor current is beyond the limit. There are two possible causes for over-torque: one is, as mentioned earlier, the presence of foreign objects stuck in the valve element, which prevents smooth opening and closing of the valve and thus triggers an over-torque alarm. The second possibility is that a short circuit in the motor coil causes an overcurrent; this can be roughly determined by checking whether the valve moves smoothly when manually operated, but it cannot be confirmed with certainty. After reporting the incident, they locked in their positions
Even after the alarm is cleared, the valve still cannot operate; it is recommended that you reset the switch position, in other words, set the limits again