How to deal with the signal interference of electromagnetic valve?
if the electromagnetic valve interference to the controller input, you can shunt capacitor at the input, filter out the interference signal.
if the contact switch is used to control the on-off of the electromagnetic valve, an absorption circuit composed of two parallel contacts
in the solenoid valve at the end of the connection with the flow diode, you can suppress the solenoid valve when the opening of the higher induction potential.
The electromagnetic shielding can reduce the external radiation interference of the solenoid valve.
