If you have not carefully checked the valve usage and performance specifications before installing the wafer type electric butterfly valve, the wafer type electric butterfly valve may have the following common failures: the valve cannot be reversed or the reverse movement is slow, gas leaks, electromagnetic Defective pilot valve, etc.
1. Wafer type electric butterfly valve can not be reversed or the reverse action is slow. Generally, it is caused by poor lubrication, springs being stuck or damaged, oil or impurities blocking the sliding parts, etc. In this regard, you should first check whether the oil mister works normally; whether the viscosity of the lubricant is appropriate. If necessary, the lubricant should be changed, the sliding part of the wafer type electric butterfly valve should be cleaned, or the spring and wafer type electric butterfly valve should be replaced.
2. After being used for a long time, the wafer type electric butterfly valve is prone to wear of the valve core sealing ring, damage to the valve stem and the valve seat, resulting in gas leakage in the valve, slow movement of the valve, or failure to commutate normally. At this time, the sealing ring, valve stem and valve seat should be replaced, or the wafer type electric butterfly valve should be replaced with a new one.
3. If the inlet and exhaust holes of the electromagnetic pilot valve are blocked by sludge and other debris, the sealing is not tight, the movable iron core is stuck, and the circuit is faulty, etc., which can cause the wafer type electric butterfly valve to be unable to switch normally. For the first three cases, the sludge and impurities on the pilot valve and the movable iron core should be cleaned. Circuit faults are generally divided into control circuit faults and electromagnetic coil faults.
Before checking the circuit failure, you should first turn the manual knob of the wafer type electric butterfly valve a few times to see if the wafer type electric butterfly valve can be normally reversed under the rated air pressure. If it can be normally reversed, the circuit is defective. When checking, you can use a meter to measure the voltage of the electromagnetic coil to see if it reaches the rated voltage. If the voltage is too low, you should further check the power supply in the control circuit and the associated travel switch circuit.
If the wafer type electric butterfly valve cannot be reversed normally at the rated voltage, check whether the joint (plug) of the solenoid coil is loose or not in contact. The method is to unplug the plug and measure the resistance of the coil. If the resistance is too large or too small, the electromagnetic coil is damaged and should be replaced.
