SDF-D series solenoid valve is the direct-acting type．The solenoid Valve features compact structure，rational design，easy installation and maintenance．It is superior to the other types in performance and quality.
　　The valve adopted full plastic packing solenoid coil andlSO．4400 international standard of electric connection device providing more advantage in insulation，waterproof，dampproof，shock and vibration protection，aeid and alkali resistance．
　　The series solenoid valve can be widely used in refrigeration，pneumatic and hydraulic system as automatic controls．　

　　SDF-D series solenoid valve is the direct-acting type．The pull of the solenoid coil opens the valve port directly by lifting the seat disc off the valve seat．While de－engized in the coil，plug stem will drop and close the valve port because of spring force and its weight．

　　1．The valve must install in hort zontal pipe line under vertical osition. 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 coli 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 avloid damage the coil.
　　 7.According to valve with manual function. It must turn manual bar to open the valve before doing system air tightness,in order to avoid to damage diaphragm.