Pneumatic Clean Series

3/4/5 Port Solenoid Valve/Common Precautions 2Be sure to read before handling. Refer to pages 7 to 16 of Front matter for safety instructions andcommon precautions for clean series. Refer to the main text for precautions for each series.256ePiping to productWhen piping products, refer to operation manual to avoid anymistakes.WiringCautionPipingCautionqWhen closed center or perfect valve style is used.When using a closed center or perfect valve style, be sure toconfirm that there is no air leakage from the piping between thevalve and cylinder.wStrictly observe the specified tightening torque.When installing fittings onto a valve, follow the given torquelevels below.Tightening torqueConnection threadM3M5Rc1/8Rc1/4Rc3/8Rc1/2Rc3/4Rc1Rc11/4Rc11/2Rc2Appropriate tightening torque Nm0.3 to 0.51.5 to 27 to 912 to 1422 to 2428 to 3028 to 3036 to 3840 to 4248 to 5048 to 50qPolarityWhen DC power is connected to a solenoid valve equippedwith light and/or surge suppressor, check for polarityindications.If the circuit has polarity, note the following issues.Without diode to protect polarityIf connected for wrong polarity, the diode inside the valve, theswitching device on the control equipment or power supplyequipment may be burnt.With diode to protect polarityIf connected for wrong polarity, the valve will not switch.wApplied voltageWhen electricity is applied to the solenoid valve, be careful toapply the correct power voltage.Improper voltage may cause malfunction or coil damage.eConfirmation of connectionsAfter wiring, make sure there is no improper wiring.Air SupplyWarningqUse clean air.Do not use compressed air that contains synthetic oil, salt, andcorrosive gases in which chemicals and organic solvents are present,because it could cause equipment damage or malfunction.CautionqInstall an air filter.Install an air filter close to and upstream of the valve. Select afiltering degree of 5µm or smaller.wTake measures by installing an after cooler, airdryer or drain catch.Compressed air containing excessive condensate may causethe valve or other pneumatic equipment to malfunction. Takecountermeasures such as installation of an after cooler, airdryer or drain catch.eIn case a large amount of carbon dust is generated,install a mist separator upstream of the valve toeliminate dustIf a large amount of carbon dust is generated from thecompressor, it may form a deposit on the internal surface ofthe valve and cause malfunction.For detailed information regarding the quality of the compressedair descried above, refer to pages 8 to 9 of Front matter.WarningEnvironmentqDo not use in an atmosphere where the valve is indirect contact with corrosive gases or chemicals.wDo not use in an explosive atmosphere.eDo not use in a place subject to heavy vibrationsand/or shocks. Confirm the specifications of eachseries.rInstall a protection cover if the product is exposedto direct sunlight.tBlock off heat radiation with a cover if a heat sourceis at a close distance.yIf the solenoid valve is mounted on a control valveor is energized for a an extended period of time,take measures to radiate excess heat so that theambient temperature will stay within the valvespecification range.WarningMaintenanceqMaintenance should be conducted according toprocedures described in the operation manual.Improper handling may result in malfunction and damage ofmachinery or equipment.wMachine maintenance and supply/exhaust ofcompressed air.When machine is to be serviced, first check for removal ofwork pieces and run-away of equipment, etc. Then, shut off thesupply pressure and power and exhaust compressed air in thesystem through residual pressure release mechanism.In case of a 3 position closed center or perfect valve style,exhaust the residual pressure between the valve and thecylinder. When the machine is restarted after re-installation orreplacement, check first that lurch prevention measures for theactuator are taken, then confirm that the equipment operatesnormally.eLow frequency operationValves should be switched at lease once every 30 days toavoid malfunctions. (Pay attention to the supply air.)rManual overrideWhen the manual override is engaged, the connectedequipment starts operation.Confirm safety before operation.CautionqDrainRemove condensate from air filters regularly.237DirectionalControl Valve