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Solenoid valve is an element widely applied in executors. It drives the valve core to open or close the valve with the electromagnet force generated by elecrtified excitation of the coils. It is mainly used in pipelines in technical process for auto control of various media and realization of automation of program contr01. 1. Before use, check if the product is damaged’ during the course of transportation and if the connecting part becomes loose and then install for use. 2. Pay attention to the flow direction of the medium, namely the position of entry and exit,during installation and magnetic head up. 3. When conne~ing with metal or other pipes, dust and oil stain inside the pipe should be removed t0 avoid intake of dirt and the subsequent noise, frequent ventilation, overload current and burnt coils. 4. When connecting the interfaces, it is preferred to coat anaerobic rubber or similar material for good seal on the thread surface to avoid air leakage or loosening. When coating, first clean the binding surface.