GUIDELINES FOR SAFELY USING SOLENOID VALVES

*Failure to follow may result in death or serious personal injury.

*Failure to follow may result in personal injury.

*Failure to follow may result in personal injury or machinery equipment damage.

WARNING
Design,specification, and usageof the compressedair system
• Only the qualified personnel should design, specify, and handle the compressedair system.
• Recommendedworking condition for each and every product shown in the catalog varies. Implementonly the most suitable working condition prior to specifyingthe systemfor each product.
• Propersafety features should be installedand securedprior to operating any machinery equipment. The source of disassembingany machinery to avoid any personalinjury.

CAUTION
Preparatory factors to consider prior to using the valves
• Verify the accuracyof the specificationsof the valves prior to the usage.
• Verify and check that the specifiacationsof the valves are consistent with the requestedor orderedspecifications.
• Use compress air to clean any metallic residues,cutting oil, or dust inside of the piping system.
• Distancebetweenthe actuator and the valve should be as minimal as possible. The piping distance longer than the minimal leads to inefficiency,waste of compressedair, and slower resposivetime of the valve.
• Usezlnc=-platedsteel tube when steel tubing is required.
• Select and connectthe proper ports for accurate piping.
p( 1) Compressedair input connectionports
8(2), A(4) Actuatorconnectionports
R2(3), R1(5) Residualair exhaust ports
• Any and all foreign materials of impurity must be removed at the paints of connectionor from the insideof valve prior to piping.
• Whenconnectingfittings to the ports, apply Teflon tape to the fitting threads. The first 2 threads of fitting should be free of any
Teflon tape. Any fragment or portion of Teflon tape entering the insideof valve will result in the improper operations of the valve.

WARNING
Installation environment for the valves
• Avoidany locationwhere explosive,vibration, and impact factors are present.
• Maintain a sufficient space for a proper ventilation and for any needed repair work when installingvalves.
• Use the valves within the allowable range of 5'C~60'C of the ambient temperatureand of the fluid material. In the valves when used under the low temperature working conditions.

CAUTION
Usage conditions for valves
• Installingair filter and oiler prior to piping of valves leads to the extension of the product life.
• Use the purified and dried air only. The source of the compressed air that contains any chemicals, organic raw materials, salt, corrosive materials will render the valvesdefectiveand non-operational.
• Excessive air leakage from the compressed air system may reduce the
product life of valve.

• Properfiltering system must be installedto prevent any substanceof impurity from entering valves. periodicalmonitoringor replacementof filters is strongly suggested.
• Use turbine oil type or class 2 (ISO VG #32) oil in order to extend the product life, Non-gradedoil may be used.
• Use only the recommendedoil type. Using non-recommendedoil type may reducethe product life of valves due to damage caused by the shrinkage or enlargement of the valve packing. (Do not use spindle oil, machine oil,hydraulic oil, cooking oil, or anti-corrosion oil)
• Do not use the valves in the dusty working condition. If the dusty working condition is unavoidable,place a protective cover over the control unit and place the noise muffler or silencerat the exhaust ports of R2(3) and R1(5).
• Do not allow the valves to be on the stand-by or pause mode for an extended period of time. The stand-by or pause mode of valves should be used briefly and momentarily.
• Solenoidvalves are not designedto be suddenlyinterrupted,stopped, or shut off. Consider and prepare other safety measurements before using the solenoid valves.

WARNING
Electrical factors for the valves
• Allowable range of voltage variation should be within 10% of the recommended voltage for the proper operation of the valves. Any voltage exceedingmore than 10% of the recommendedvoltage will result in the coil damageand the malfunctioningof the valves.
• Turningon or off of Alternate Current (AC) may result in surge current that may have problematiceffect to the magneticcircuitry. It is recommended that an alternate plan is implementedto avoid such problematiceffect.
• Continuoussupply of eteotrlcrty to the solenoidcoil may result in increaseof the surface temperature of the coil. In order to avoid the damageto the coil, pleaseverify circuitry design before piping.
• Even if the source of electricity is completelydisconnected,the operation of the valves may not come a complete stop due to a residual current in the magnetic circuitry. Reduce the magnitude of the leakage current on both sides by 20% of the rated voltagefor AC supply current and by 10% of the rated voltagefor DCsupply current.

CAUTION
Applicable torque force when piping valves
• Applying excessive torque force will damage the fitting threads when connection to the valves. Use the followingguidelineof torque force for each applicable port size