SMC Networks JSXH31-CP X2 Series User manual





 
ＪＳＸＨ３１－ＣＰ＊＊＊－＊＊－＊－Ｘ２

-1-
Contents
Contents……………………………………………………………………………..P1
Safety Instructions………………………………………………………………….P2,3
１． Precautions for Design….…………………………………………………….P4
２． Operating Environment.………………………………………………………P5
３． Precautions for Fluid.…………………………………………………………P5
４． Fluid Quality…..………………………………………………………………..P6
５． Installation………………………………………………………………………P6
６． Piping……………………………………………………………………………P6, 7
７． Wiring……………………………………………………………………………P8
８． Electrical Connection………………………………………………………….P9,10
９． Electric Circuit………………………………………………………………….P10,11
１０． Maintenance and Inspection………………………………………………….P11
１１． Replacement Parts…………………………………………………………….P11
１２． Return of Product………………………………………………………………P11
１３． Models…………………………………………………………………………..P12
１４． Specifications…………………………………………………………………..P13
１５． Construction…………………………………………………………………….P13
１６． Definition and Terminology…………………………………………………….P14
１７． Troubleshooting…………………………………………………………………P14
１８． Trouble Check Sheet…………………………………………………………...P15 to 17

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Metso Valve Controller
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage. These
instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.” They are all
important notes for safety and must be followed in addition to International Standards (ISO/IEC)
*
1)
, and other safety
regulations.
∗1) ISO 4414: Pneumatic fluid power - General rules and safety requirements for systems and their components
ISO 4413: Hydraulic fluid power - General rules and safety requirements for systems and their components
IEC 60204-1: Safety of machinery - Electrical equipment of machines - Part 1: General requirements
ISO 10218-1: Robots and robotic devices - Safety requirements for industrial robots - Part 1:Robots
etc.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results. The expected performance and safety assurance of the equipment will be
the responsibility of the person who has determined its compatibility with the product. This person should also
continuously review all specifications of the product referring to its latest catalog information, with a view to
giving due consideration to any possibility of equipment failure 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 machinery/equipment until safety is confirmed.
1. The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2. When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Our products cannot be used beyond their specifications. Our products are not developed,
designed, and manufactured to be used under the following conditions or environments. Use
under such conditions or environments is not covered.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Use for nuclear power, railways, aviation, space equipment, ships, vehicles, military application, equipment
affecting human life, body, and property, fuel equipment, entertainment equipment, emergency shut-off
circuits, press clutches, brake circuits, safety equipment, etc., and use for applications that do not conform
to standard specifications such as catalogs and operation manuals.
3. Use for interlock circuits, except for use with double interlock such as installing a mechanical protection
function in case of failure. Please periodically inspect the product to confirm that the product is operating
properly.

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Metso Valve Controller
Safety Instructions
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
Scope of Warranty : Warranty shall be granted for non-conformity of the Company’s product (“Product”) to the
relevant specifications. Any such non-conformity resulting from wear of expendable parts resulting from the
Customer's normal use thereof, or from the Customer's inappropriate, insufficient or inexperienced maintenance
or from the Customer's inappropriate storage, installation, use, operation or the like, or from the Customer's
modification or the like are excluded from warranty.
Period of Warranty : One (1) year from the commencement of use by the Customer or one year and half (1.5)
from the delivery of the Product; whichever expires earlier.
Claiming Procedures : If the Customer determines that the Product is non-conforming, the Customer shall
immediately notify the Company. If the notice does not arrive at the Company within two (2) weeks from the date
of expiration of the relevant warranty period, the Customer's rights to warranty is forfeited. Even in the case
where the notice arrives within the period prescribed above, liability for any damage arising from any delay of the
notice shall be borne by the Customer.
Remedies : If any non-conformity is actually found in the Product as a result of an inspection made by the
Company, the Company shall, upon consultation, repair or replace the Product. The Company will not accept
any other claims (such as monetary compensation).
Related Expenses : Where the Product is eligible for warranty, shipment expenses therefor shall be borne by
the Company. Regardless of whether or not the Product is eligible for warranty, expenses for removal and
installation incurred in relation to replacement of the Product shall be borne by the Customer.
Limitation of Liability : Even if any legal liability in whichever form other than the warranties set forth above
arises in respect of the Company, the Company’s scope of liability shall be limited as follows:
-The Company shall be held liable only to the extent that the relevant liability is caused by its act or omission
due to its negligence.
-The Company’s liability shall not exceed the amount of direct damages incurred by the Customer in respect of
the Product, and the Company shall not be held liable for any indirect, contingent, consequential or punitive
damage.
-The Company’s liability shall not exceed the amount of the sales price of the Product.
-The Company shall not be held liable for any damage caused to the nuclear energy, space or aviation
business, for any damage due to any force majeure events including war, terrorist activities or natural
disasters, or for compliance with safety regulations or environmental regulations that is beyond the scope of
business of the Company.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass destruction
(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the relevant security
laws and regulations of the countries involved in the transaction. Prior to the shipment of a SMC product to
another country,
assure that all local rules governing that export are known and followed.

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1．Precautions for Design
Warning
1. Check the specifications.
Fully understand the applications, fluids, environment, and other operating conditions to use this
product within the specified range.
Operation outside of the product operating range may cause it to be damaged or malfunction.
SMC does not guarantee against any damage if the product is used outside of the specification range.
2. Not suitable for use as an emergency shutoff valve, etc.
This product is not designed as a valve for safety applications such as an emergency shutoff valve.
If the product is used in such a system, additional safety measures should also be implemented.
3. This product cannot be used for pressure holding (including vacuum).
Since the valve is subject to air leakage, they cannot be used for applications such as holding pressure
(including vacuum) in a pressure vessel.
4. Liquid sealing
When flowing liquid is used, install a by-pass valve to the system so that it does not form a liquid-
sealed circuit.
5. Driving of actuators
When an actuator, such as cylinder, is to be driven by the valve, take appropriate measures in advance
to prevent danger due to actuator operation.
6. Energized use for extended period of time
If this product is used in an energized state for an extended period of time, the solenoid coil generates
heat. Do not use the product in a sealed container. Install the product in a ventilated location. Do not
touch the solenoid valves with bare hands during and after energization.
7. Water hammer
If impact due to sudden pressure fluctuation, such as water hammer is applied, the valve may be
damaged. Therefore, install a water hammer resistant device (accumulator, etc.).
8. Leakage at time of fluid supply
Be aware that when the valve is closed and pressure is suddenly applied due to the startup of fluid
supply source or for other reason, the valve may open momentarily, and fluid may leak.
9. Dual pressure
If there is a possibility that reverse pressure is applied to the valve, take countermeasures such as
mounting a check valve on the downstream side of the valve.
10. Minimum operating pressure differential
Be aware that even if the pressure difference is above the minimum operating pressure differential when
the valve is closed, the pressure difference may fall below the minimum operating pressure differential
when the valve opens, depending on the capacity of the supply source (pumps, compressors, etc.) or
the type of pipe restrictions (the piping is bent continuously due to elbow or tee, or narrow tube nozzle
is installed in the end). If the product is used below the minimum operating pressure differential, the
operation becomes unstable due to shortage of pressure difference, which may cause valve opening or
closing failure, or oscillation, leading to a failure.
11. Prohibition of disassembly and modification
Do not disassemble or modify the product (including additional machining). Failure to follow this
instruction may cause bodily injury and/or an accident.

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2．Operating Environment
Warning
1. Do not use this product at any of the following locations.
1) Location where the product may be exposed to an atmosphere containing steam, corrosive
fluid (chemicals), seawater, or water.
Even on a product with a protection classification (IP65, IP67), take appropriate protective measures
in an environment where it is exposed to water for a long time. Failure to follow this instruction may cause
moisture to enter the product through fine clearances on its outer surface. For a solenoid valve, entry of
moisture may lead to burnout of the coil or short circuit. Check that liquid or splatter does not splash on the
product from peripheral equipment when installing this product near equipment that uses a large amount of
water or oil, such as machine tools and machining equipment.
2) Location with explosive atmospheres
3) Location where vibration or impact is generated
4) Location where the product is subject to heat sources or radiant heat
5) Location where freezing occurs inside the piping
When the product is to be used in a cold area or in winter, take countermeasures against freezing of
the fluid. If the fluid freezes, take countermeasures such as discharge of water from the piping at the
time of stopping of the equipment or installing of heaters or thermal insulators on the pipes.
When heating the solenoid valve, do not heat the coil area because doing so degrades the heat
dissipation.
3．Precautions on Fluid
Warning
1. Selection of fluid
1) To see whether given fluid can be used, check the compatibility between the components and the
fluid in the application before use.
2) As the compatibility of fluid may differ depending on conditions including type, additive,
concentration, and temperature. Therefore, pay careful attention when selecting the material.
Please contact SMC for details, if necessary.
2. Selection of fluid
The fluid applicable to this product is water only. Do not use the following fluids.
1) Fluid harmful to human body
2) Burnable, combustible fluids
3) corrosive gas
4) Sea water, saline solution
5) Oil, air
3. Take measures to prevent static electricity since some fluids can cause static electricity.
4. Fluid temperature
Use the product with a fluid temperature within the product specification range.
5. Install a filter (strainer) to use clean fluid.
1) Use of a fluid that contains foreign matter can lead to problems, such as malfunction and seal failure,
attributable to acceleration of wear of the valve seat and iron core, attachment of foreign matter to
the iron core sliding part, or other reason. To remove foreign matters, install an appropriate filter
(strainer) (100 mesh or higher as a guide) on the upstream side.
2) The filter (strainer) may get clogged. Replace or clean it if the pressure has dropped to 0.1 MPa or
lower.

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4．Quality of Fluid
Warning
1. Water
1) Operation failure due to the rust transferred from the piping or chloride flowing in the piping may
result in the breakage of the product.
When the product is broken, fluids or components might be scattered. Therefore, install an
appropriate protective measure.
2) Water contains substances that generate scale and sludge, such as calcium and magnesium. If
they adhere to the internal surface of the valve, a malfunction may occur. Install water softening
equipment, which removes those substances, and a strainer on the upstream side of the valve to
remove those substances.
5．Installation
Warning
1. Before installing this product, secure a space necessary for maintenance or inspection.
2. Avoid sources of vibration, or adjust the arm from the body to the minimum length so that
resonance will not occur.
3. Do not install the product near a heat source or exposed to radiant heat.
4. Do not apply external force to the coil.
When installing this product, apply a spanner to the exterior of the piping connection while paying
attention so that it will not come into contact with the coil.
5. Do not warm the coil with a heat insulator, etc.
When the product is heated as a countermeasure against freezing, the portions where the
countermeasures are taken should be limited to the piping and body only. Do not heat the coil.
Heating the coil may burn it out.
6. If the leakage increases or the equipment does not operate properly, stop using the product.
After installation or during maintenance, check that the product is correctly installed by supplying
compressed air and electric power and conducting appropriate functional and leakage inspections. Do
not use the product when the equipment does not operate correctly.
7. Do not touch the valve with bare hands during or immediately after energization.
The valve becomes very hot once it is energized. Pay attention not to touch it because doing so can
cause burns.
Caution
1. Painting and coating
Do not erase, remove, or cover up the warnings or specifications printed or attached on the product.
6．Piping
Warning
1. A tube may detach from the fitting and uncontrollably move when in use due to the deterioration
or breakage of the tube.
To prevent the tube from breaking loose, install a protective cover or fix the tube securely.
2. When piping the tubing, fix the valve securely by using the mounting holes on the bottom of the
body or a bracket to prevent the product from being lifted.
Caution
1. For handling of one-touch fitting and applicable tubes, refer to "Tube fitting and tube/common
precautions" on the SMC catalog.
2. Preparation before piping
Before piping, sufficiently perform air blow (flushing) or cleaning to remove any cutting chips, cutting
oil, dust, etc. from the piping. Connect piping so that forces including tension, compression, and bending
force are not applied to the valve body.

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Wrapping of sealant tape
When screwing pipes or fittings intoports, ensure that chips from thepipe threads andsealing material
does not enter the valve.
When using sealant tape, leave 1.5 to 2 thread ridges exposed at the end of the threads.
3. Screwing-in of pipe and fitting
When connecting a pipe to the valve, tighten it within the allowable torque range below.
Tightening torque for piping
Connection
thread Proper tightening 
Rc3/8 22～24
Rc1/2 28～30
4. When using a fitting other than an SMC fitting
Follow the manufacturer's instructions.
5. Avoid connecting ground lines to piping, as this may cause the system to be corroded by electric
corrosion.
6. When piping to a product, pay attention not to make connection to wrong supply ports etc.
7. Recommended piping conditions
When connecting a pipe to a one-touch fitting, conduct piping with a sufficient margin in tube length
in accordance with the recommended piping conditions shown in Fig. 1.
Also, when using a cable tie, etc. to bind pipes together, make sure that an external force does not apply
to the fitting. (Refer to Fig. 2.)
Tubing
size
Mounting pitch A Straight
line length
Nylon tubing
Soft nylon
tubing
Polyurethane
tubing
φ1/8”
44
or more
29 or more
25 or more
16 or more
φ6
84 or more
39 or more
39 or more
30 or more
φ1/4”
89 or more
56 or more
57 or more
32 or more
φ8
112 or more
58 or more
52 or more
40 or more
φ10
140 or more
70 or more
69 or more
50or more
φ12
168 or
more
82 or more
88 or more
60 or more

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

1.  
2. 

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
3. 
4.  
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

5. 


6. 



       

．

1.     
：  ： 

- 9 -
3. DIN terminal
Disassembly
1. Loosen the binding head screw with the flange, pull the housing up in the arrow direction to remove
the solenoid valve from the connector.
2. Pull out the binding head screw with the flange from the housing.
3. Insert a small flat blade screwdriver to the notch at the bottom of the terminal block, and then
remove the terminal block from the housing. (Refer to the figure below.)
4. Remove the gland nut and take out the washer and rubber seal.
Wiring
1. Put the gland nut, washer, and rubber seal onto the cable in this order, and then insert it into the
housing.
2. Loosen the small binding screw of the terminal block, insert the lead wire core or crimp terminal of
the lead wire into the terminal, and securely fix it with the small binding screw. The size of the small
binding screw of the terminal block is M3.
注1) 
注2) Cables with an outside diameter of ϕ6 to ϕ12 mm can be used.
注3) When using cables with an outside diameter of ϕ9 to ϕ12 mm, remove the internal part of the
rubber seal.
Assembly
1. Put the gland nut, washer, rubber seal, and housing onto the cable in this order, connect the cable
to the terminal block, and then mount the terminal block in the housing (Insert the terminal block
until it makes a click sound.).
2. Insert the rubber seal and washer to the cable entry of the housing in this order, and then securely
tighten the gland nut.
3. Insert the gasket into the gap between the bottom of terminal block and the plug on the equipment,
insert the binding screw with flange from the top of housing, and then tighten it.
Note1) 
Note2) Depending on the way the housing and terminal block are assembled, it is possible to
change the orientation of the connector in units of 90 degrees.
Internal connections are as shown below. Make connections
to the power supply accordingly.

- 10 -
4. M12 connector
1. IP67 (enclosure) of the valve can be obtained by using a female connector (with cable) compliant
with IP67.
Note that the product cannot be used underwater.
2. Mounting the connector using tools may break the connector. Securely tighten the connector by
hand. (0.39~0.49N･m)
3. Avoid repeatedly bending or stretching the cable, putting a heavy object on it, or applying a force to
the product.
4. Do not pull the connector or cable carelessly.
5. When installing a connector, do not bend the cable from the base of the connector body.
■Coding and pin layout of M12 connector on valve side
The shape (coding) and pin layout of M12 connector are as follows.
Use a cable with female connector with compatible coding. When connecting the connector, align
the key of the connector on the cable side (female side) with the key of the connector on the valve side (male
side).
If the connector is forcefully screwed in with its orientation unaligned, it can cause a failure such
as the breakage of pin.
9．Electric Circuit
1. DC circuit
●Grommet ●Grommet/Conduit/DIN terminal
●DIN terminal ●M12 connector
2. AC circuit The standard product is equipped with a surge voltage suppressor.
●Grommet/Conduit/DIN terminal/M12 connector ●DIN terminal

- 11 -
10．Maintenance and Inspection
Warning
1. Removal of product
1) Shut off the fluid supply source and release the fluid pressure in the system.
2) Shut off the power supply.
3) Confirm that the valve temperature has dropped sufficiently, and then remove the product.
2. Operation at low frequency
Perform switching of the valve at least once every 30 days to prevent malfunction.
To use the product in an optimum condition, conduct periodic inspection every six months.
3. Storage
To store the product for an extended period after its use, thoroughly remove all moisture and store it
in a location where the product is not exposed to sunlight and high temperature/humidity to prevent rust
and deterioration of rubber materials, etc.
4. Periodically conduct maintenance and inspection.
Periodically conduct appropriate functional inspection and leakage inspection to see whether the
product is correctly installed.
If leakage increases or the equipment does not operate properly, stop using the product.
11．Replacement Parts
If a replacement part is required for maintenance, make an inquiry to SMC.
12．Return of Product
Warning
If the product being returned is attached or possibly attached with substances, fluid, or its residue
that is harmful to humans, for the purpose of securing safety, please first contact SMC, conduct
appropriate cleaning (detoxifying processing), submit Product Return Request Sheet or
Detoxification/Decontamination certificate to SMC, and receive approval from SMC before returning
the product.
Please refer to International Chemical Safety Cards (ICSC) or others for a list of harmful substances.
If you have any questions, contact your nearest SMC sales representative.

- 12 -
13．Models
How to order

- 13 -
14．Specifications
15．Construction

- 14 -
16．Definition and Terminology
Pressure-
related
terms
Maximum
operating pressure
differential
This shows the maximum pressure difference (difference between
inlet
pressure and outlet pressure) that is allowed for
operation. When the
downstream side pressure is 0 MPa, this becomes
the maximum
operating pressure.
Minimum
operating pressure
differential
This shows the minimum pressure difference (difference between inlet
pressure and outlet
pressure) that is required for the main valve to be
operated stably.
Maximum system
pressure
This shows the maximum pressure to be applied in the piping
. The
pressure difference of
the solenoid valve needs to be equal to or lower
than the maximum operating pressure differential.
Withstand
pressure
This shows the pressure which the product must withstand without
lowering its performance when the specified
pressure (static pressure)
has been retained for one minute and the pressure has returned to the
operating pressure range.
(Value under the specified conditions)
Electric
terms Apparent power(VA)
Product of voltage (V) and current (A). Its relationship with power
θ 
Note) cosθrepresents the power factor. cosθ≈0.9
Surge voltage Surge voltage is the high voltage spike instantaneously generated
at
the cut-off area when the electrical power supply is cut off.
IP Protection
Rating
This is the class specified in JIS C 0920: Degrees of protection
provided by enclosures (IP Code).
Others
Material PPS: Polyphenylene sulfide POM: Polyacetal
NBR: Nitrile rubber
configuration
symbol
According to the JIS symbol, when the valve is closed
, IN and OUT are
blocked. However, if the pressure at port 2 is higher than
that at port 1,
the valve will not be able to block the fluid flow.
17．Troubleshooting
If any failure is found during operation, please check and take measures in accordance with the trouble
check sheet.

18. Trouble Check Sheet (target series: JSXH31P-CP***-**-*-Ｘ2)
Operating conditions
Possible cause Countermeasures
Power supply
voltage is not
applied.
□
Is there any abnormality such as failure in power
supply and control circuit?
Is there any abnormality, such as disconnection of
wiring system and erroneous wiring?
→
There is a possibility of abnormality in the power supply, control
circuit, or wiring system.
1) Replace or repair the power supply, control circuit, or wiring
system.
Abnormality in
supply pressure
□
Is the operating pressure above the operating
pressure differential range? →
The operating pressure may be above the operating pressure
differential range.
1) Use this product within the operating pressure differential range.
Drop of attraction
force of solenoid coil
□
Is the product used with the applied voltage below
the allowable voltage range?
*Lower limit of allowable voltage range: 90% V of
rated voltage
→
As the applied voltage was below the allowable voltage range, the
attraction force of the solenoid coil may have lowered and the
armature may have not operated.
1) Use this product in the range of rated voltage ±10% V.
□
Is water or other liquid attached to the coil? →
If this product is used in an environment where the product is subject
to moisture such as water, steam, and dew condensation, water or
the like may have entered the solenoid coil.
1) Take a waterproof countermeasure such as installation of a cover
on the solenoid coil.
□
Is surge voltage applied? →
There is a possibility that an excessively large surge voltage caused
burnout or damaged the wire of the solenoid coil.
1) Replace the solenoid coil with a solenoid coil with surge voltage
suppressor.
□
Is surge pressure such as water hammer generated? →
There is a possibility that surge pressure such as water hammer
caused damage.
1) Install a surge pressure mitigating device (accumulator, etc.).
□
Is the applied voltage above the upper limit of the
allowable voltage range?
*Lower limit of allowable voltage range: 110% V of
rated voltage
→
There is a possibility that the applied voltage is above the upper limit
of the allowable voltage range.
1) Use this product in the range of rated voltage ±10% V.
2) Replace the solenoid coil.
□
Is foreign matter mixed in the fluid?
Has foreign matter entered the inside of the solenoid
valve?
→
There is a possibility that as foreign matter was caught in the sliding
part of the armature, the sticking and sealing performance of the
armature lowered.
1) Install an appropriate strainer (100 mesh or higher as a guide) on
the upstream side of the valve.
2) After piping, conduct air blow of the pipe including the solenoid
valve.
□
Is vibration or impact applied? →Malfunction of armature or part breakage due to resonance
1) Use this product at a location not subject to vibration or impact.
□
Are the materials of the solenoid valve parts
compatible with the fluid? →There is a possibility that malfunction occurred because of shrinkage, deterioration and breakage, or swelling of a rubber seal part.
□
Is the fluid temperature or ambient temperature
above the upper limit of the operating temperature
range?
→
There is a possibility that a rubber seal part has been deteriorated
due to high temperature.
1) Use this product within the operating temperature range.
□
Is the product used with fluid temperature or ambient
temperature below the lower limit of the operating
temperature range?
→
There is a possibility that due to low temperature, a rubber seal part
has been hardened or a part was broken due to the freezing of the
fluid.
1) Use this product within the operating temperature range.
2) Take countermeasures including installation of heater on the pipe.
□
Is the operating pressure differential above the
maximum operating pressure differential? →
There is a possibility that a rubber seal part was broken due to
excessively large pressure.
Use this product at the maximum operating pressure differential or
below.
Symptom
Does
not
operat
e
Warranty period: Within 1.5 years after the product is delivered or 1 year in service
Please refer to and use this trouble check sheet as a diagnosis check sheet for early solution in the event of trouble.
Confirmation of condition
Burnout and broken
wire of solenoid coil
Malfunction of
armature
YY/MM/DD
XX months
Approx. ____ cycles
Deliver date
Operating period
Accumulated
operating cycles
Deterioration or
breakage of rubber
seal part
□
Does
not turn
ON
-15 -

Possible cause Countermeasures
□
Is there any abnormality such as failure in the power
supply and control circuit?
Is there any abnormality, such as disconnection of
wiring system and erroneous wiring?
→
There is a possibility of abnormality in the power supply, control
circuit, or wiring system.
1) Replace or repair the power supply, control circuit, or wiring
system..
□
Is the product used with a leakage voltage from the
power supply above the allowable value? →
There may be an influence of the residual magnetic force.
1) Use this product with a leakage voltage at the allowable value or
below.
Abnormality in
supply pressure
□
Is the operating pressure below the minimum
operating pressure differential? →
There is a possibility that the operating pressure is below the
minimum operating pressure differential.
1) Use this product within the operating pressure differential range.
Reverse pressure
circuit
□
Is the piping connection direction such that a reverse
pressure is applied to the circuit in a reverse system
manner?
→
There is a possibility that sealing did not work because of the circuit in
which a reverse pressure was applied.
1) Check the piping connection direction.
In particular, when you use the product for vacuum drawing,
connect the upstream side of the solenoid valve to the atmospheric
side and its downstream side to the vacuum pump side.
2) If a reverse pressure is applied in the piping circuit, install a check
valve.
□
Is foreign matter mixed in the fluid?
Has foreign matter entered the inside of the solenoid
valve?
→
There is a possibility that as foreign matter was caught in the sliding
part of the armature, the sticking and sealing performance of the
armature lowered.
1) Install an appropriate strainer (100 mesh or higher as a guide) on
the upstream side of the valve.
2) After piping, conduct air blow of the pipe including the solenoid
valve.
□
Is vibration or impact applied? →Malfunction of armature or part breakage due to resonance
1) Use this product at a location not subject to vibration or impact.
□
Are the materials of the solenoid valve parts
compatible with the fluid? →
There is a possibility that a malfunction occurred because of
shrinkage, deterioration and breakage, or swelling of a rubber seal
part.
□
Is the fluid temperature or ambient temperature
above the upper limit of the operating temperature
range?
→
There is a possibility that a rubber seal part has been deteriorated
due to high temperature.
1) Use this product within the operating temperature range.
□
Is the product used with the fluid temperature or
ambient temperature below the lower limit of the
operating temperature range?
→
There is a possibility that due to low temperature, a rubber seal part
has been hardened or a part was broken due to the freezing of the
fluid.
1) Use this product within the operating temperature range.
2) Take countermeasures including installation of heater on the pipe.
□
Is the operating pressure above the maximum
operating pressure differential? →
There is a possibility that a rubber seal part was broken due to
excessively large pressure.
Use this product at the maximum operating pressure differential or
below.
□
Is there any abnormality such as failure in the power
supply and control circuit?
Is there any abnormality, such as disconnection of
wiring system and erroneous wiring?
→
There is a possibility of abnormality in the power supply, control
circuit, or wiring system.
1) Replace or repair the power supply, control circuit, or wiring
system..
□
Is the product used with the leakage voltage of the
power supply above the allowable value? →
There may be an influence of the residual magnetic force.
1) Use this product with a leakage voltage at the allowable value or
below.
Abnormality in
supply pressure
□
Is the operating pressure above the operating
pressure differential range? →
The operating pressure may be above the operating pressure
differential range.
1) Use this product within the operating pressure differential range.
2) Select an appropriate model.
Reverse pressure
circuit
□
Is the piping connection direction such that a reverse
pressure is applied to the circuit in a reverse system
manner?
→
There is a possibility that sealing did not work because of the circuit in
which a reverse pressure was applied.
1) Check the piping connection direction.
In particular, when you use the product for vacuum drawing,
connect the upstream side of the solenoid valve to the atmospheric
side and its downstream side to the vacuum pump side.
2) If a reverse pressure is applied in the piping circuit, install a check
valve.
□
Is foreign matter mixed in the fluid?
Has foreign matter been mixed in the solenoid
valve?
→
There is a possibility that as foreign matter was caught in the sliding
part of the armature, the sticking and sealing performance of the
armature lowered.
1) Install an appropriate strainer (100 mesh or higher as a guide) on
the upstream side of the valve.
2) After piping, conduct air blow of the pipe including the solenoid
valve.
□
Is vibration or impact applied? →Malfunction of armature or part breakage due to resonance
1) Use this product at a location not subject to vibration or impact.
Does
not
operat
e
Confirmation of conditionSymptom
□
Does
not turn
OFF
Deterioration or
breakage of rubber
seal part
Fluid
leaks
out
Power supply
voltage is applied.
Malfunction of
armature
Malfunction of
armature
Power supply
voltage is applied.
□
Leakag
e from
valve
(internal
leakage
)
-16 -

Possible cause Countermeasures
□
Is the fluid temperature or ambient temperature
above the upper limit of the operating temperature
range?
→
There is a possibility that a rubber seal part has been deteriorated
due to high temperature.
1) Use this product within the operating temperature range.
□
Is the product used with the fluid temperature or
ambient temperature below the lower limit of the
operating temperature range?
→
There is a possibility that due to low temperature, a rubber seal part
has been hardened or a part was broken due to the freezing of the
fluid.
1) Use this product within the operating temperature range.
2) Take countermeasures including installation of heater on the pipe.
Abnormality in
supply pressure
□
Is the operating pressure above the maximum
system pressure? →
The operating pressure may be above the maximum system
pressure.
1) Use this product at the maximum system pressure or below.
2) Select an appropriate model.
Inconsistency
between allowable
leakage values
□
Is the allowable leakage value of the solenoid valve
(refer to catalog) above the allowable leakage value
of the system?
→Select a model with non-leak specification.
□
Are the materials of the solenoid valve parts
compatible with the fluid? →
There is a possibility that a malfunction occurred because of
shrinkage, deterioration and breakage, or swelling of a rubber seal
part.
□
Is the fluid temperature or ambient temperature
above the upper limit of the operating temperature
range?
→
There is a possibility that a rubber seal part has been deteriorated
due to high temperature.
1) Use this product within the operating temperature range.
□
Is the product used with the fluid temperature or
ambient temperature below the lower limit of the
operating temperature range?
→
There is a possibility that due to low temperature, a rubber seal part
has been hardened or a part was broken due to the freezing of the
fluid.
1) Use this product within the operating temperature range.
2) Take countermeasures including installation of heater on the pipe.
□
Is the operating pressure differential above the
maximum operating pressure differential? →
There is a possibility that a rubber seal part was broken due to
excessively large pressure.
Use this product at the maximum operating pressure differential or
below.
□
Is foreign matter mixed in the fluid?
Has foreign matter been mixed in the solenoid
valve?
→
There is a possibility that as foreign matter was caught in the sliding
part of the armature, the sticking and sealing performance of the
armature lowered.
1) Install an appropriate strainer (100 mesh or higher as a guide) on
the upstream side of the valve.
2) After piping, conduct air blow of the pipe including the solenoid
valve.
□
Is the fluid kinematic viscosity value above the
allowable value?
*Allowable value: 50 mm
2
/s
→
There is a possibility that the armature malfunctioned due to the
increase of the sliding resistance.
1) Use this product at the allowable kinematic viscosity or below.
2) To use this product with high-viscosity fluid, select an air operated
valve.
Abnormality in
supply pressure
□
Is the operating pressure above the operating
pressure differential range? →
The operating pressure may be above the operating pressure
differential range.
1) Use this product within the operating pressure differential range.
2) Select an appropriate model.
□
Are the materials of the solenoid valve parts
compatible with the fluid? →
There is a possibility that a malfunction occurred because of
shrinkage, deterioration and breakage, or swelling of a rubber seal
part.
□
Is the fluid temperature or ambient temperature
above the upper limit of the operating temperature
range?
→
There is a possibility that a rubber seal part has been deteriorated
due to high temperature.
1) Use this product within the operating temperature range.
□
Is the product used with the fluid temperature or
ambient temperature below the lower limit of the
operating temperature range?
→
There is a possibility that due to low temperature, a rubber seal part
has been hardened or a part was broken due to the freezing of the
fluid.
1) Use this product within the operating temperature range.
2) Take countermeasures including installation of heater on the pipe.
□
Is the operating pressure differential above the
maximum operating pressure differential? →
There is a possibility that a rubber seal part was broken due to
excessively large pressure.
Use this product at the maximum operating pressure differential or
below.
Drop of attraction
force of solenoid coil
□
Is the product used with the applied voltage below
the allowable voltage range?
*Lower limit of allowable voltage range: 90% V of
rated voltage
→
As the applied voltage was below the allowable voltage range, the
attraction force of the solenoid coil may have lowered and the
armature may have not operated.
1) Use this product in the range of rated voltage ±10% V.
Abnormality in
supply pressure
□
Is the operating pressure above the operating
pressure differential range? →
The operating pressure may be above the operating pressure
differential range.
1) Use this product within the operating pressure differential range.
2) Select an appropriate model.
Malfunction of
armature
□
Is foreign matter mixed in the fluid?
Has foreign matter been mixed in the solenoid
valve?
→
There is a possibility that as foreign matter was caught in the sliding
part of the armature, the sticking and sealing performance of the
armature lowered.
1) Install an appropriate strainer (100 mesh or higher as a guide) on
the upstream side of the valve.
2) After piping, conduct air blow of the pipe including the solenoid
valve.
Deterioration and
breakage of rubber
seal part
Malfunction of
armature
Symptom Confirmation of condition
There
is
noise -
Small
flow -
Fluid
leaks
out
□
Leakag
e from
valve
(internal
leakage
)
□
Insuffici
ent air
tightnes
s
(externa
l
leakage
)
Deterioration or
breakage of rubber
seal part
Deterioration of
rubber seal part
-17 -

Revision history
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