It can use as actor of automatic system in water supply system，fire control system，water spray system in dirty proofing,agricultural．Also can use for pneumatic hydraulic and food machine.　

　　SDF－M1 series solenoid valve is pilot type valve．When energized the coil，it lead a magnet and pick up plug，open the small orifice，course to pressure In upside of valve reduced．So the pressure difference happen both side of diaphragm．The pressure difference lift diaphragm to open the main oritice．When main orifice open，diaphragm shouldn’t drop even if pressure difference both side of diaphragm exist too，because of flow inertia function When coil deenergized，plug drop to close small orifice because of reset sping．Media flow to upside ofvalve through throttle orifice．Then balance pressure both side of diaphragm，so diaphragm return to close the main valve．

l．The valve must install in horizontal pipe line under vertical position． The flow direction must be meet the arrow direction in valve body．
2．Installing position should be low Viberation.
3．Must install filter before solenoid valve In order to prevent block throttle port and lead to no function．
4．The coil input power must meet rated input power showed on the label．
5．System operating pressure must be meet open valve performance．
6．Departure coil from valve when energized in coil is limited in order to avoid damage the coil．
7．According to valve with manual fuflCtion．It must turn manual bar to Open the valve be fore doing system air tightness，in order to avoid to damage diaphragm．