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Countermeasure 

 
 

No. 

Countermeasure 

(1) 

Connect wires correctly. Apply the correct voltage. 

(2) 

Replace the part or lead wire (or pilot valve). 

(3) 

Replace the parts or connect wires correctly. 

(4) 

Replace the pilot valve. 

(5) 

If incorrect oil has been used for lubrication, remove the oil with air blow, and replace the valve with 
a new one.   
If a lubricant is used in the system after the replacing the valve, use turbine oil Class 1 (ISO VG32). 

Check that the lubricating amount is correct. 

(6) 

If there is a large amount of condensate or condensate cannot be removed completely, mount an 
auto drain or install a dryer and replace the valve. 

(7) 

Check if the pressure is within the specification range. Check that the pressure is not dropped 
remarkably when the valve is operated. 

(8) 

Heat (ignition) might be generated from the coil, stop using the valve and replace it. Adjust the 
voltage so that it will be within the operating voltage range. 

(9) 

Protect the valve to prevent it from being exposed to water. 

(10) 

Remove foreign matter in the piping by air blow and replace the valve. 

(11) 

Repair or replace the actuators. 

(12) 

Adjust the voltage. 

 
 
If the countermeasures above are not effective, there may be a problem with the valve. 
 
In that case, stop using the valve immediately. 
If any of the examples below are applicable, there may be an internal problem with the valve. 
Stop using the valve immediately. 
 
1. Voltage was outside of the rated voltage. 
2. Oils other than specified were supplied. 
3. Lubrication was stopped in the middle of lubrication. Or, lubrication was interrupted temporarily. 
4. Directly exposed to water. 
5. Severe impact was applied. 
6. Foreign matter such as condensate or rubber entered. 
7. Other than the cases mentioned above, any usage which falls under the precautions in this Operation 

Manual. 

 

 If the product has failed, then please return the valve as it is. 

 

- 13 -

 

No.VP3145-OMM0002-B

 

Summary of Contents for VP31 5 Series

Page 1: ...Doc no VP3145 OMM0002 B PRODUCT NAME 3 Port Solenoid Valve MODEL Series Product Number VP31 5 Series ...

Page 2: ...ty Instructions 2 3 Design Selection 4 5 Mounting 5 Piping 5 6 Wiring 6 Lubrication 6 Air Supply 6 Operating Environment 7 Maintenance 7 Specific Product Precautions 8 11 Troubleshooting 12 13 1 No VP3145 OMM0002 B ...

Page 3: ...hen configuring the equipment 2 Only personnel with appropriate training should operate machinery and equipment The product specified here may become unsafe if handled incorrectly The assembly operation and maintenance of machines or equipment including our products must be performed by an operator who is appropriately trained and experienced 3 Do not service or attempt to remove product and machi...

Page 4: ...duct 3 Prior to using SMC products please read and understand the warranty terms and disclaimers noted in the specified catalog for the particular products 2 Vacuum pads are excluded from this 1 year warranty A vacuum pad is a consumable part so it is warranted for a year after it is delivered Also even within the warranty period the wear of a product due to the use of the vacuum pad or failure du...

Page 5: ...elease the heat generated by the valve 9 Extended periods of continuous energization If a valve will be continuously energized for an extended period of time the temperature of the valve will increase due to the heat generated by the coil assembly This will likely adversely affect the performance of the valve and any nearby peripheral equipment 10 Do not disassemble the product or make any modific...

Page 6: ... not be erased removed or covered up Please consult with SMC before applying paint to resinous parts as this may have an adverse effect due to the solvent in the paint Piping 1 Preparation before piping Before piping is connected it should be thoroughly blown out with air flushing or washed to remove chips cutting oil and other debris from inside the pipe 2 Winding of sealant tape When screwing pi...

Page 7: ...mpleting all wiring 4 External force applied to the lead wire If an excessive force is applied to the lead wire this may cause faulty wiring Take appropriate measures so that a force of 30 N or more is not applied to the lead wire Lubrication This is a valve which requires lubrication Be sure to lubricate it for operation It may cause problems such as damage and malfunction of the valve if it is n...

Page 8: ...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 Maintenance 1 Perform maintenance and inspection according to the procedures indicated in the operation manual If handled improperly human injury and or malfunction or damage of machinery and equipment may occur 2 Removal of equipment and supply ...

Page 9: ...wire even in the state of bare wire In that case loosen the screw 3f and place a lead wire into the bracket 3d and then tighten it once again b The maximum size for the round terminal 9 is 1 25 mm2 3 5 and for the Y terminal is 1 25 mm2 4 c Cable 8 outside diameter φ6 to φ12 mm Note For the one with outside diameter ranged between φ9 to φ12 remove the inside parts of the rubber seal 7 before using...

Page 10: ... in the pressure container 3 External Pilot Use external pilot model in the following cases Vacuum or low pressure 0 2MPa or less Vacuum Low pressure type Using the valve with supply port external throttle General type Air pressure of supply port is slow General type Resistance in outlet side is small in case of air blowing or filling an air tank General type Note 1 Keep external pilot pressure wi...

Page 11: ...es Specific Product Precautions 3 Be sure to read this before handling the products Other Precautions Note N O valve operates properly only when appropriate pressure is applied to the pilot 10 No VP3145 OMM0002 B ...

Page 12: ...e 6 wipe them to clean and apply grease Apply grease to the portion A of the spool valve 1 internal surface of the guide ring and portions B C D of the body 1 too Note 1 Do not wash the O ring and the spool valve with organic solvent or such Note 2 It is suggested to use the silicone grease G 40M made by Shin Etsu Chemical Co Ltd 3 Overhaul 1 Insert the element 2 and the spring washer 3 in the dir...

Page 13: ...re 7 Burnt out of the coil Over voltage or incorrect coil 8 Exposure to water 8 9 Entrainment of foreign matter to the pilot valve Incorrect oil 5 Collection of drainage inside valve 6 Failure of the valve Blown fuse and or broken lead wire 2 Failure of the pilot valve or coil Insufficient contact at electrical contact connector 3 Broken wire in the coil Energizing failure 4 Failure phenomenon Pos...

Page 14: ...d replace it Adjust the voltage so that it will be within the operating voltage range 9 Protect the valve to prevent it from being exposed to water 10 Remove foreign matter in the piping by air blow and replace the valve 11 Repair or replace the actuators 12 Adjust the voltage If the countermeasures above are not effective there may be a problem with the valve In that case stop using the valve imm...

Page 15: ...Tokyo 101 0021 JAPAN Tel 81 3 5207 8249 Fax 81 3 5298 5362 URL http www smcworld com Note Specifications are subject to change without prior notice and any obligation on the part of the manufacturer 2018 SMC Corporation All Rights Reserved No VP3145 OMM0002 B ...

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