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Warning 

Design / Selection

 

 
 

1.  Confirm the specifications. 

Products represented in this manual are designed only for 
use in compressed air systems. 
Do not operate at pressures, temperatures, etc., beyond the 
range of specifications, as this can cause damage or malfunction.

 

Please contact SMC when using a fluid other than compressed 
air. 
We do not guarantee against any damage if the product is 
used outside of the specification range. 

 

 

2.  Actuator drive

 

When an actuator, such as a cylinder, is to be driven using a 
valve, take appropriate measures (such as the installation of 
a cover or the restricting of access to the product) to prevent 
potential danger caused by actuator operation. 

 

 

3.  Intermediate stops

 

It is difficult for products like cylinders to make a piston stop 
at the required intermediate position accurately and precisely 
due to the compressibility of air.

 

Furthermore, since valves and cylinders are not guaranteed 
for zero air leakage, it may not be possible to hold a stopped 
position for an extended period of time.

 

Please contact SMC if it is necessary to hold a stopped 
position for an extended period of time. 

 

 

4.  Holding pressure

 

Since valves are subject to air leakage, they cannot be used 
for applications such as holding pressure in a pressure vessel. 

   

5.  Not suitable for use as an emergency shutoff valve, 

etc.

 

The valves presented in this catalog are not designed for safety 
applications (e.g. emergency shutoff valve). If the valves are 
used in such applications, additional safety measures should 
be adopted. 

 

6.  Release of residual pressure

 

For maintenance and inspection purposes install a system for 
releasing residual pressure. 

 

7.  Ventilation

 

Provide ventilation when using a valve in a confined area, 
such as in a closed control panel. For example, install a 
ventilation opening, etc., in order to prevent pressure from 
increasing inside of the confined area and to release the heat 
generated by the valve. 

 

8.  Extended periods of continuous energization

 

 If a valve is continuously energized for an extended period of 

time, heat  generated by the coil assembly may result in 
reduced performance and shorter service life, or have 
adverse effects on peripheral equipment. If the total energizing 
time per day is expected to be longer than the total 
de-energizing time per day, use a valve which has DC type, 
power saving type or long loading time type.

 

Depending on the operating conditions, it may be possible to 
use valves which are not mentioned above. Please contact us. 

 

 When the valve is mounted onto a control panel, take 

measures against radiation in order to keep the valve 
temperature within the specified range.

 

   

9.  Do not disassemble the product or make any 

modifications, including additional machining.

 

Doing so may cause human injury and/or an accident.

 

 

 
 

1.  Leakage voltage 

Take note that the leakage voltage will increase when a resistor 
is used in parallel with a switching element or when a  C-R 
circuit (surge voltage suppressor) is used for protecting a 
switching device because of the leakage voltage passing 
through the C-R circuit. The suppressor residual leakage 
voltage should be as follows.

 

 
 
 
 
 
 
 

DC coil 

3% or less of the rated voltage 

 

AC coil 

20% or less of the rated voltage 

 

2.  Solenoid valve drive for AC with a solid state output 

(SSR, TRIAC output, etc.) 

1)  Current leakage 

When using a snubber circuit (C-R element) for surge 
protection of the output, a very small amount of electrical 
current will continue to flow even during the OFF state. 
This results in the valve not returning. In a situation 
where the tolerance is exceeded, as in the above case, 
take measures to install a bleeder resistor. 

 

2)  Minimum allowable load amount (Min. load current) 

When the consumption current of a valve is less than the 
output’s minimum allowable load volume or the margin is 
small, the output may not switch normally. Please contact 
SMC. 

  

3.  Surge voltage suppressor 

If a surge protection circuit contains nonstandard diodes, 
such as Zener diodes or varistor, a residual voltage that is in 
proportion to the protective circuit and the rated voltage will 
remain. Therefore, take into consideration the surge voltage 
protection of the controller.

 

In the case of diodes, the residual voltage is approximately 1 V. 

 

 

4.  Operation in low temperature conditions 

It is possible to operate a valve in extreme temperatures, as low 
as  0°C. Take appropriate measures to avoid the freezing of 
drainage, moisture, etc., in low temperatures.

 

 

 

5.  Mounting orientation 

Mounting orientation is not specified.

 

 

Caution 

VEX5 Series 

3 Port Solenoid Valves / Precautions 1

 

 

 

Be sure to read before handling 

- 4 - 

No.VEX

∗∗∗∗

-OMA0019-C

 

Содержание VEX5 Series

Страница 1: ...Doc no VEX OMA0019 C PRODUCT NAME Economy Valve MODEL Series Product Number VEX5 Series ...

Страница 2: ...fety Instructions 2 3 Design Selection 4 Mounting 5 Piping 5 Wiring 5 Lubrication 5 Air Supply 5 6 Operating environment 6 Maintenance 6 Specific Product Precautions 7 to 9 Troubleshooting 10 11 1 No VEX OMA0019 C ...

Страница 3: ...when 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 mach...

Страница 4: ...oduct 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 d...

Страница 5: ... energizing time per day is expected to be longer than the total de energizing time per day use a valve which has DC type power saving type or long loading time type Depending on the operating conditions it may be possible to use valves which are not mentioned above Please contact us When the valve is mounted onto a control panel take measures against radiation in order to keep the valve temperatu...

Страница 6: ...ype light surge voltage suppressor check the polarity when connecting If a mistake is made regarding the polarity damage may occur to the diode in the valve the switching element in the control device power supply equipment etc 2 Applied voltage When electric power is connected to a solenoid valve be careful to apply the proper voltage Improper voltage may cause malfunction or coil damage 3 Check ...

Страница 7: ...f it is used in an environment where there is possible contact with oil weld spatter etc exercise preventive measures 7 When the valve is mounted in a control panel or it s energized for a long period of time make sure the ambient temperature is within the specifications of the valve Maintenance 1 Maintenance should be performed according to the procedure indicated in the Operation Manual this cop...

Страница 8: ... 3 and then set the terminal block 3 to the housing 2 Push it down until you hear the click sound 2 Putting rubber seal 6 plain washer 5 in this order into the cable introducing slit on the housing 2 then further tighten the cable gland 4 securely 3 Insert the gasket 8 between the bottom part of terminal block 3 and a plug attached to equipment and then screw 1 in from the top of the housing 2 to ...

Страница 9: ...after called REG and pilot valve hereinafter called SOL remote control the economy valve Action ON OFF SOL Cylinder Xa Xb Xc Yb Ya Mode Upward High speed a Low speed b Downward High speed c Low speed d Stop e a The air in the upper cylinder chamber is exhausted from the port 1 P of VEX A YE A and the air in the tank flows in through the port 1 P of VEX A XE A b Air flows into the lower cylinder ch...

Страница 10: ...re which overcomes compressed pressure Pu ΔP in the lower chamber to the tank chamber at the lower end of the stroke P2 Pu ΔP 4 In order to release air from the device for maintenance close the inlet valve for the main system Sm to release the air in the tank with exhaust valve E then discharge air in the cylinder upper chamber from VEXA YE A Then discharge air from the pilot This prevents lurchin...

Страница 11: ...reakage of lead wire Incorrect contact at the contact and connection 15 5 Foreign matter is caught in the poppet 9 6 Coil burnout Voltage is too high Or incorrect coil 7 Directly exposed to water 8 Increase of the pilot pressure Foreign matter is caught in the armature Air leaks from the pilot exhaust The supply pressure fluctuates The pilot pressure fluctuates Air is consumed by the equipment on ...

Страница 12: ...fected by the vibration and impact 12 Reduce the amount of lubrication to the amount at which the oil does not splash from the exhaust port P port 13 Adjust the voltage so that the voltage at the time of operation stays within the specification range 14 Ensure proper supply pressure and pilot pressure 15 Stop the air consumption Check where the air is leaking from and stop the air leakage 16 Insta...

Страница 13: ...nuary 1987 4 14 1 Sotokanda Chiyoda ku 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 VEX OMA0019 C ...

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