If you haven't check carefully before you install the wafer electric butterfly valve valve usage and performance specification so the wafer electric butterfly valve are likely to have the following several kinds of common failures: valve cannot reversing or reversing slow, gas leak, such as electromagnetic pilot valve has some problem.
(1) the wafer electric butterfly valve cannot reversing or reversing slow, usually because of bad lubrication, spring stuck or damage, oil or impurity sticking sliding part and other causes. To this, should first check of oil mist is normal; The viscosity of the lubricating oil. When necessary, the lubricating oil should be changed, the wafer cleaning sliding part of the electric butterfly valve, or change of spring and the wafer electric butterfly valve.
(2) the wafer electric butterfly valve is seen after long time use the sealing ring wear, the valve stem and valve core seat damage phenomenon, lead to gas leakage in the valve, valve slow or can't normal commutation failure, etc. At this point, a seal, valve stem and seat should be replaced, or will the wafer electric butterfly valve.
(3) if the electromagnetic pilot valve inlet and vent was sludge and other debris jam, closed lax, activity core was jammed, a fault circuit, etc., all can lead to the wafer electric butterfly valve can't normal commutation. The former three kinds of activities should be cleaning pilot valve and core on the sludge and impurities. And circuit fault generally divided into two groups: the control circuit fault and electromagnetic coil.
Before checking circuit fault, should be the wafer electric butterfly valve manual knob turning a few times, see the wafer electric butterfly valve under the rated pressure whether can normal commutation, if can normal commutation, circuit is defective. Check, instrument measuring electromagnetic coil voltage are available, and see if the rated voltage, if the voltage is too low, should further check the control circuit of the power supply circuit and associated travel switch.
If under the rated voltage clamp cannot normal reversing electric butterfly valve, you should check if the connector (plug) of electromagnetic coil is loose or contact. Method is to remove the plug, measuring coil resistance, if the value is too big or too small, and explain the electromagnetic coil is damaged, should be replaced.
Newly purchased the wafer electric butterfly valve when unpacking the case should be timely installation, debugging good before delivery valve manufacturer will usually put valve, do not casually on loose valves accessories, if be sure to check the need to contact the manufacturer first.
