Safety instructions symbols
Safety precautions
Safety instructions
- Before using the product, please read the user manual thoroughly and follow the safety rules.
- Keep this manual in a safe place for future reference.
- Do not modify, disassemble, or assemble the product arbitrarily.
- Observe the conditions of use specified on product's label or instruction.
- Operate, install, and disassemble product after confirming the safety of the surrounding conditions.
- For use in unspecified conditions or environments, we recommend that you thoroughly review safety measures and consult with us.
Qualifications of professional personnel
- We recommend handling by a person with sufficient knowledge and experience about the product.
- The person who determines the design or specifications of the system should determine whether the product is suitable for use.
Warranty and disclaimers
- For standard products, the warranty period is applied within 1 year from the date of use or within 18 months after delivery, whichever comes first.
- During the warranty period, if a failure or damage is clearly attributable to our company, we will provide a replacement/necessary replacement part, and we will not bear any additional loss. Warranty here means the warranty for our products, and any other damage caused by the failure of the product is excluded from the scope of the warranty.
Specifications
- Fluid : filtered compressed air, inert gas
- Ambient and fluid temp. : -5~60℃ (with no freezing)
- Operating pressure
- ~~Single(S) : 0.15~0.7MPa (1.5~7kgf/㎠)
- ~~Double type(D) : 0.1~0.7MPa (1~7kgf/㎠)
- ~~Closed center(H), pressure center(I), exhaust center type(J) : 0.2~0.7MPa (2~7kgf/㎠)
- Lubrication : not required (but, when lubricated turbine oil ISO VG32 or equivalent)
- Manual override : push return(standard), push turn lock
- Operation type : internal pilot
- Pilot exhaust type : main valve · pilot collective exhaust type
- Allowable voltage : ±10% rated voltage
- Coil insulation : class B (less than 130℃)
- Shock/Vibration resistance : 150/30m/s2
- Protective structure : dust proof
- Electrical connection : plug connector(M, L), DIN connector
- For detailed specifications, please refer to the catalogs(KY) for each model.
Functions
<div class="cms-symbol-block_oneline">
<div class="image light-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af6053fc413574eda990a6_Symbol__KY-S.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">single</div></div></div>
<div class="image light-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af6052200da1a93f7e824f_Symbol__KY-D.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">double</div></div></div>
<div class="image light-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af6052fc8917fbb7ec2ca2_Symbol__KY-H.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">closed center</div></div></div>
<div class="image light-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af6052585a08fb617a56e8_Symbol__KY-I.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">pressure center</div></div></div>
<div class="image light-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af6052bc514953f8b5662d_Symbol__KY-J.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">exhaust center</div></div></div>
<div class="image dark-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af63acbfbf2c07df0bdbe4_Symbol__KY-S_dark.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">single</div></div></div>
<div class="image dark-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af63ac0ebb2018a61c4594_Symbol__KY-D_dark.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">double</div></div></div>
<div class="image dark-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af63ac12c914d3fef9accb_Symbol__KY-H_dark.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">closed center</div></div></div>
<div class="image dark-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af63ac0ebb2018a61c4598_Symbol__KY-I_dark.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">pressure center</div></div></div>
<div class="image dark-mode-images"><div class="cms-symbol-item"><div class="cms-symbol-item__img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65af63acbd9dd99b54b759ff_Symbol__KY-J_dark.png" class="manual-symbol-img"></div><div class="cms-symbol-oneline-text">exhaust center</div></div></div>
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Product configuration
<div class="image light-mode-images manual-full-img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65d450e77b119865b537d217_KY__Str.png"></div>
<div class="image dark-mode-images manual-full-img"><img src="https://cdn.prod.website-files.com/6577e4ddb18c5363e98a478a/65d450e6dcbd9b58e13926d9_KY__Str_dark.png"></div>
Installation and disassembly
Precautions before installation
<div class="ico_danger">Installation and disassembly of a pressurized product may cause personal injury and/or property damage.</div>
<div class="ico_danger ico_2ndline">Before installation, be sure to release the pressure inside the product and piping.</div>
- Ensure free space around the product for maintenance and safe operation.
- Do not install in a location with high humidity or temperature. Doing so may cause performance degradation or malfunction.
- Avoid dropping and external impacts when transporting and installing the product.
- In case of use at low temperatures, be careful against solidification or freezing of drain, water, etc.
- Connect the pneumatic pipe after completing the installation.
- Use it in compressed air systems only. The warranty does not cover any damages caused by using pressure in excess of the specifications range.
- Be sure to prepare countermeasures in case of danger when operating an actuator such as a cylinder with a valve.
- When using a center-closed valve such as a 3-position closed center, it is not possible to stop at an exact position due to the compressibility of air, so be careful when using it in a system that aims to maintain a stop position for a long period of time.
- When using a manifold, the actuator may malfunction due to back pressure. Prepare countermeasures for back pressure.
- It is not designed to ensure safety. Do not use it as a block valve; be sure to use it after preparing measures to ensure safety.
- A long period of continuous conduction results in heating of the coil assembly, which may cause degradation of the product’s performance and life expectancy.
Installation
- Look at the numbers and alphabets written on the product to check the direction of flow and port for each task before positioning the product.
Pressure - 1 or P
Work - 2, 4 or A, B
Exhaust - 3, 5 or R1, R2 - Fasten screws on the pipes and fittings of all pneumatic ports.
- Hold the female screw and proceed with a proper torque. Inadequate tightening torque may cause loosening or improper sealing, whereas excessive tightening torque may cause damage to the screws.
Torque for piping
Rc(PT) 1/8” : 7~9 N･m
Rc(PT) 1/4” : 12~14 N･m
Rc(PT) 3/8” : 22~24 N･m
Rc(PT) 1/2” : 28~30 N･m - Perfectly seal the pneumatic port, and then connect the pneumatic tube.
Pneumatic piping
- When connecting only the pneumatic pipe, without a separate mounting device, consider installing a separate pipe support to prevent excessive moment load or vibration on the pipe side. Otherwise, a malfunction or damage may occur.
- Before installing the piping, flush or clean the piping sufficiently to remove any foreign substances. Even when fastening piping or fittings, make sure that chips from the piping screws or sealing material do not move into the machine. These may cause malfunction.
- When using seal tape to prevent foreign matter such as teflon seal from getting inside a valve, wrap the screw completely except the last screw thread.
Wiring
- When carrying out a wiring task, be sure to do so with the power disconnected and turned off.
- With a double solenoid valve, do not conduct electricity through coils on both sides simultaneously.
- Make sure the voltage supplied is identical. Failure to do so may cause faulty operation or damage to the coils.
- Check the presence of polarity when supplying electricity to a solenoid valve to which a DC lamp/surge protection circuit is attached.
Installation of plug connector
- To install - Push the connector all the way in until a click sound is heard as it goes into the 凹-shaped groove of the cover.
- To detach - Press the connector lever and pull it from the 凹-shaped groove to detach it.
Disassembly
<div class="ico_danger">Before disassembly, be sure to release the pressure inside the product and pipe.</div>
- Exhaust air from the entire system and product.
- Press and release the lock on the pipe or fitting, then pull out the hose line.
- Loosen the fitting on the connecting flange and turn it out.
Maintenance
Air source
- Please use clean air.
- If the compressed air contains chemicals, organic solvents, synthetic oil, or corrosive gas, it may cause damage to parts or malfunction.
- Air containing a large amount of moisture or foreign substances can cause malfunction, so install an air dryer or an after cooler on the inlet side of the product.
Maintenance and inspection
- When separating a device, take measures to prevent any falling non-operating object and any sudden start. Then, block the supplied air and power and exhaust compressed air from inside of the system before separation.
- When changing or reinstalling a device, perform a test operation to prevent sudden deviation of an actuator, etc. and to see if it operates properly by manual control.
- For the manual control push turn lock method, press the button and rotate it in the direction of the arrow. If it is not rotated, you need to continue pressing it to be able to control it manually.
- In case of low usage, perform a conversion operation of the valve once within 30 days to prevent faulty operation.
Cleaning
- Clean the exterior of the product periodically with a soft cloth.
Allowable detergents : soapy water (maximum 60°C), neutral detergent (without aromatic compounds)
Failures and measures
Introduction of foreign matter into the valve
- Remove foreign matter from inside the valve and piping, use of filter recommended.
Swelling of packings
- Remove and control the drain collected in the line filter.
- Replace valves, use specially ordered valve packing parts suitable for special environments.
Damage to or deformation of the valve by external force
- Be careful of impact on the valve exerted from outside.
- Fix it so that the lead wire is not pulled or install a protective cover.
Damage to or deformation of the seal
- Control the pressure and remove the drain or oil collected in a filter.
Damage or deformation caused by external force
- Reduce the impact exerted on a valve.
- Fix it so that the lead wire is not pulled or install a protective cover.
Fault caused by thein flow of drain
- Remove and control the drain collected in the line filter.
- Replace valves, use specially ordered valve packing parts suitable for special environments.
Abnormal supply pressure
- Check if the supply pressure is within the scope of the operating pressure according to the product specifications and adjust if necessary.
Malfunction caused by vibration
- Check for the occurrence of vibrations and install vibration-proof rubber or change the location to install the valve.
For additional information, please visit our web site or contact us.
