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3/4/5 Port Solenoid Valves Precautions 6 Be sure to read this before handling. Maintenance Warning 1. Perform maintenance inspection according to the procedures indicated in the operation manual. If handled improperly, malfunction and damage of machinery or equipment may occur. 2. Removal of equipment, and supply/exhaust of compressed air When components are removed, first confirm that measures are in place to prevent workpieces from dropping, run-away equipment, etc. Then, cut off the supply air and electric power, and exhaust all air pressure from the system using the residual pressure release function. For 3-position closed center or double check valve type, exhaust the residual pressure between the valve and the cylinder. When the equipment is operated after remounting or replacement, first confirm that measures are in place to prevent lurching of actuators, etc. Then, confirm that the equipment is operating normally. In particular, when a 2-position double solenoid valve is used, releasing residual pressure rapidly may cause the spool valve malfunction depending on the piping conditions, and the connected actuator may operate. 3. Low frequency operation Valves should be operated at least once every 30 days to prevent malfunction. (Use caution regarding the air supply.) 4. Manual override When the manual override is operated, connected equipment will be actuated. Operate after safety is confirmed. 5. If the volume of air leakage increases or the valve does not operate normally, do not use the valve. Perform periodic maintenance of the valve to confirm the operating condition, and if there is any air leakage. Caution 1. Drain flushing Remove drainage from the air filters regularly. (Refer to the specifications.) 2. Lubrication In the case of rubber seals, once lubrication has been started, it must be continued. Use class 1 turbine oil (with no additive), VG32. If other lubricant oil is used, it may cause malfunction. Please contact SMC for suggested class 2 turbine oil (with additive), VG32. 3. Manual override operation When switching a double solenoid valve by the manual override operation, instantaneous operation may cause a malfunction of the cylinder. It is recommended that the manual override be held until the cylinder reaches the stroke end position. Operating Environment Warning 1. Do not use in an atmosphere having corrosive gases, chemicals, sea water, water, water steam, or where there is direct contact with any of these. 2. Products with IP65 and IP67 enclosures (based on IEC60529) are protected against dust and water, however, these products cannot be used in water. 3. Products compliant to IP65 and IP67 satisfy the specifications through mounting. Be sure to read the Precautions for each product. 4. Do not use in an environment where flammable gas or explosive gas exists. Usage may cause a fire or explosion. The products do not have an explosion proof construction. 5. Do not use in a place subject to heavy vibration and/or shock. 6. The valve should not be exposed to prolonged sunlight. Use a protective cover. Note that the valve is not for outdoor use. 7. Remove any sources of excessive heat. 8. If it is used in an environment where there is possible contact with oil, weld spatter, etc., exercise preventive measures. 9. When the solenoid valve is mounted in a control panel or its energized for a long time, make sure ambient temperature is within the specification of the valve. Caution 1. Temperature of ambient environment Use the valve within the range of the ambient temperature specification of each valve. In addition, pay attention when using the valve in environments where the temperature changes drastically. 2. Humidity of ambient environment When using the valve in environments with low humidity, take measures to prevent static. If the humidity rises, take measures to prevent the adhesion of water droplets on the valve. 7 B