XIANQI Normally Closed Solenoid ValveThis is a normally closed type electric solenoid valve, on to open and off to close. Suitable for use with lines in water, air, oil and low viscosity non-corrosive fluid applications. Installation MethodThe direction of water flow is marked on the valve body. If installed in reverse, the solenoid valve will not work properly. The output water flow will also lead to water usage. There are two wires to be connected, one on the phase, the other on the neutral. One wire on the phase the other on the neutral regardless of the direction (be careful, it's 220 volts). To cut off the arrival of water if floodingEspecially for a case of flooding you need a normally closed solenoid valve because in the event of a power failure or cut the solenoid valve closes and isolates the circuit with the normally open solenoid valve, current is needed to close it. Therefore imperative normally closed The exist of course but not the same utility. Horizontal InstallationThis solenoid valve is designed to be installed indoors horizontally in a dry environment. If used outdoors, the coil part should be well protected from water. Apply toLimited space, energy saving, household, hobbyist, etc. Suitable for use with pipelines in water, air, oil and low viscosity non-corrosive fluid applications.