What is the difference between single and double solenoid valves?
single solenoid valve as the single acting cylinder, with a spring reset, charged (coil), a loss of power push (spring reset) work the way.
double solenoid valve is double acting cylinder, without spring reset, two coil only one excitation, a push-pull working mode
single control solenoid valve only two position is a position in the spring under the action of another without signal. Is the electromagnetic signal of the position.
Double control solenoid valve, three position valve, no signal to the middle position, which end signal, the piston to where the pipeline is conducted, after the loss of electricity back to the middle position of the piston
