CKD 3KA1 User manual

ＳＭ−２０８６７６-A
ＩＮＳＴＲＵＣＴＩＯＮ ＭＡＮＵＡＬ
ＳＥＬＥＸ  ＶＡＬＶＥ
３ＫＡ１，Ｍ３ＫＡ１
●Please read this instruction manual
carefully before using this product, par-
ticularly the section describing safety．
●Retain this instruction manual with the
product for further consultation whenever
necessary．
3rdEdition

[SM-208676-A/3]
―1
―
SAFETYPRECAUTIONS
WhendesigningandmanufacturingadeviceusingCKDproducts,themanufacturerisobli-
gatedtomanufactureasafeproductbyconfirmingsafetyofthesystemcomprisingthefol-
lowingitems:
・Devicemechanism
・Pneumaticorwatercontrolcircuit
・Electriccontrolthatcontrolstheabove
Itisimportanttoselect,use,handle,andmaintaintheproductappropriatelytoensurethat
theCKDproductisusedsafely.
Observewarningsandprecautionstoensuredevicesafety.
Checkthatdevicesafetyisensured,andmanufactureasafedevice.
１．Thisproductisdesignedandmanufacturedasageneralindustrialmachinepart.Itmust
behandledbysomeonehavingsufficientknowledgeandexperience. 
２．Usethisproductwithinitsspecifications.
Thisproductcannotbeusedbeyonditsspecifications.Additionally,theproductmustnotbemodified
ormachined.
Thisproductisintendedforuseingeneralindustrialdevicesandparts.Usebeyondsuchconditionsis
notconsidered.ConsultwithCKDfordetailswhenusingtheproductbeyondtheuniquespecification
range,outdoors,orinthefollowingconditionsorenvironments.Inanycase,measuresforsafetyshall
beprovidedwhenthevavlemalfunctions.
①Useforspecialapplicationsrequiringsafetyincludingnuclearenergy,railroad,aviation,ship,vehicle,
medical equipment, equipment or applications coming into contact with beverage or food,
amusementequipment,emergencyshutoffcircuits,pressmachine,brakecircuits,orforsafeguard.
②Useforapplicationswherelifeorassetscouldbeadverselyaffected,andspecialsafetymeasures
arerequired.
３．Observecorporatestandardsandregulations,etc.,relatedtothesafetyofdevicedesign
andcontrol,etc.
ISO4414,JISB8370(pneumaticsystemrules)
JFPS2008(principlesforpneumaticcylinderselectionanduse)
IncludingHighPressureGasMaintenanceLaw,OccupationalSafetyandSanitationLaws,othersafety
rules,standardsandregulations,etc.
４．Donothandle,pipe,orremovedevicesbeforeconfirmingsafety.
①Inspectandservicethemachineanddevicesafterconfirmingsafetyoftheentiresystemrelatedto
thisproduct.
②Notethattheremaybehotorchargedsectionsevenafteroperationisstopped.
③Wheninspectingorservicingthedevice,turnofftheenergysource(airsupplyorwatersupply),and
turn off power to the facility. Release any compressed air from the system, and pay enough
attentiontopossiblewaterleakageandleakageofelectricity.
④When starting or restarting a machine or device that incorporates pneumatic components, make
surethatsystemsafety,suchaspop-outpreventionmeasures,issecured.
WARNING

[SM-208676-A/3] −2−
５．Observewarningsandcautionsonthepagesbelowtopreventaccidents.
The safety cautions are ranked as "DANGER", "WARNING" and "CAUTION" in this
section.
FailuretopayattentiontoDANGERnoticesmaycauseasitu-
ation that results in a fatality or serious injury and that re-
quiresurgentaddressing.
Failure to pay attention to WARNING notices may result in a
fatalityorseriousinjury.
FailuretopayattentiontoWARNINGnoticesmayresultinin-
juryordamagetoequipmentorfacilities.
Notethat someitemsdescribedas"CAUTION"mayleadto seriousresultsdependingon the
situation.Inanycase,importantinformationthatmustbeobservedisexplained.
Precautionswithregardtoguarantee
Guaranteeperiod
Theguaranteeperiodof ourproduct shallbeone(1) yearafter itisdelivered to theplacespecified by the
customer.
Guaranteecoverage
IfanyfailureforwhichCKDCORPORATIONisrecognizedtoberesponsibleoccurswithintheabovewarranty
period,asubstituteornecessaryreplacementpartsshallbeprovidedfreeofcharge,ortheproductshallbe
repairedfreeofchargeattheplantofCKDCORPORATION. 
However,theguaranteeexcludesfollowingcases:
①Defectsresultingfromoperationunderconditionsbeyondthosestatedinthecatalogueorspecifications.
②Failureresultingfrommalfunctionoftheequipmentand/ormachinemanufacturedbyothercompanies.
③Failureresultingfromwronguseoftheproduct.
④FailureresultingfrommodificationorrepairingthatCKDCORPORATIONisnotinvolvedin.
⑤Failureresultingfromcausesthatcouldnotbeforeseenbythetechnologyavailableatthetimeofdeliv-
ery.
⑥FailureresultingfromdisasterthatCKDisnotresponsibleof.
Guaranteestatedherecoversonlythedeliveredproducts.Anyotherdamageresultingfromfailureofthedeliv-
eredproductsisnotcoveredbythisguarantee.
Confirmationofproductcompatibility
Ourcustomershallberesponsibleofconfirmingcompatibilityofourproductusedinourcustomer’ssystem,
machineryordevice.
！
 WARNING:
！
 CAUTION:
！
 DENGER :

[SM-208676-A/3]
―3
―
UNPACKING (Section 3)
Bags containing solenoid valves should be opened only
when you are ready to connect the valves tothe pipes
immediatelyafterward.
Ifbagsareopenedbeforethevalvesarereadytobecon-
nectedtothepipes,theentryofforeignmatterfromthe
piping ports could cause the solenoid valves to fail or
malfunction.
INSTALLATION (Section 4)
Ifyouhavetousetheproductunderconditionsthatare
differentfromthespecifiedconditionsorifyouintendto
usetheproductforaspecialapplication,besuretocon-
sultusabouttheproductspecificationsbeforeusingthe
product.
ENVIRONMENT (Section 4.1)
a) Inadustyenvironment,foreignmattermayentereven
throughtheexhaustport.
Themovementoftheexhaustvalvecausesarespiratory
actionattheexhaustvalve,whichmaycauseinhalationof
foreignmatterneartheexhaustport.  Thispotentialsit-
uation would be worse if the exhaust port is facing up-
ward.  Attachasilencertotheexhaustportorhavethe
exhaustportfacedownward.
b) Keep the solenoid valve system dry.  Take care to
avoiddirectcontactwithdrippingwaterorsplashesof
cuttingoil.
If the solenoid valve system is wet by a direct contact
withwaterorcuttingoil,anelectricalleakorburntsole-
noid coils may result. Protect the solenoid valve system
byusingacoverorbyinstallingitinsideapaneledcasing. 
Ifthecylinderrodissplashedwithcuttingoil,theoilmay
penetrate through the cylinder into the secondary side
piping ofthe solenoid valve.  This must be prevented to
avoidmalfunctions.  Consultusforpreventivemeasures.
c) Thecoilswillproduceheat.
Particularly if the solenoid valve system is installed in a
controlboardorifthesolenoidcoilsneedtobeenergized
foralongtime,considerprovidingsufficientventilationto
releasetheheat.  Thecoilscangetveryhot.
d) Do not use the solenoid valve system in an atmos-
pherethatincludesacorrosivegasorsolventvapors.
Do not use the solenoid valve system in an atmosphere
that includes a corrosive gas such as the sulfur dioxide
gasorinanatmospherethatincludessolventvapors.
e) Vibrationsandshocks
Do not subject the solenoid valve system to vibrations
50m/s2orstrongerorshocks300m/s2orstronger.
！
 CAUTION:
！
 CAUTION:
！
 CAUTION:

[SM-208676-A/3] −4−
f) Avoidusingthesolenoidvalvesysteminahumiden-
vironment because the humidity is likely to cause
condensationwithachangeinthetemperature.
g) Donotusethenormaltypesolenoidvalvesforanap-
plicationthatrequiresconformitywithexplosion-proof
specifications.  Choose explosion-proof solenoid
valvesinstead.
h) Thepackingandgasketsmaydeterioratesoonerthan
usual if used in an atmosphere with a higher than
normaldensityofozone(forexample,theatmosphere
near a beach or in an area with frequent thunder-
storms).
Consultusforthe packingand gasketstobe used inan
atmospherewithahigherozonedensity.
INSTALLATION (Section 4.2)
When installing a solenoid valve unit, never attempt to
holditinpositionbymeansofthepipesconnectedtoit.
Mountthesolenoidvalvebyapplyingthemountingscrews
and/ormountingplatetothesolenoidvalve.
！
 WARNING:
！
 CAUTION:

[SM-208676-A/3]
―5
―
PIPING (Section 4.3)
a) Observe the recommended tightening torque when
connectingpipes.
Observing the recommended tightening torque prevents
airleakageanddamagetothescrewthreads.  Toprevent
damagetothescrewthreads,firstuseyourhandtolightly
tightenthescrewandthenuseatooltotightenthescrew
totherecommendedtorque.
b) Makesure thatthe pipeswillnot bedisconnected at
the joints by mechanical movements, vibrations or
tension.
If the exhaust piping of the pneumatic circuit is discon-
nected,theactuatorspeedcontrolisdisabled.
If the above happens to a chuck holding mechanism, the
chuck will open.  The inadvertent opening of the chuck
maycauseaseriousaccident.
c) When supplying the compressed air for the first time
after completing the piping, be sure to check every
jointinthepipingforairleakage.
d) When supplying the compressed air for the first time
after completing the piping, increase the air pressure
graduallybutnever introducea highly-pressurizedair
suddenly.
A sudden introduction of a highly-pressurized air may
disconnectpipesatjointsand/orcausethetubestojump
around,anyofwhichmaycauseaninjury.
e) Donotdecreasetheinsidediameterofthepipingfrom
anyofthesolenoidvalveexhaustportstoadiameter
lessthantheexhaustpipeconnectingportsize.
Normal operation of the actuator depends on the
smoothnessoftheexhaustflow.  Withamanifoldsystem,
arestrictiontotheexhaustflowmaypreventnormalop-
erationofothersolenoidvalves.
f) Removalofforeignmatter
Rust and other foreign matter in the pneumatic circuit
may cause a malfunction or leakage fromthe valveseat. 
Insert a filter (maximum allowable particle size 5μm or
less)immediatelyupstreamofthesolenoidvalve.
g) Airsupply
Donotrestricttheflowofairthroughtheairsupplypip-
ing.  Withamanifoldsystemwithmultiplestations,adrop
in the air supply pressure may cause trouble through a
delayintheoperationtiming.
！
 CAUTION:

[SM-208676-A/3] −6−
WIRING (Section 4.4)
Before wiring, read the instruction manual carefully and
understandtheinstructions.
A person who wires needs to have knowledge for safely
performing such operation based on the understanding
aboutthemechanismsandoperatingprinciplesofsolenoid
valves.
Before supplying the power, check the power supply
voltageandthecurrenttype(ACorDC).
MANUAL OVERRIDE (Section 5.2)
a)Oncethemanualoperationdevicehasbeenoperated,
alwaysreturnittoitsorigin(initialposition),andthen
starttheoperationofthedevice.
b) Beforeusingthemanualoverride,makesurethatno-
bodyispresentnearthecylindertobeactivated.
AIR QUALITY (Section 5.3)
a) Donotsupplyanythingotherthancompressedair.
b) Supply clean compressed air without any mixture of
corrosivegas.
a)
Compressed air usually contains a large amount of 
drain, oxidized oil, tar, foreign matter, and rust from
thepiping.  Filter outthose elementsinthe supplied
air because they may cause a malfunction and de-
crease  service life.  In addition, clean the exhaust
beforeitisreleasedtotheairtominimizepollution.
b) Once you have lubricated a pre-lubricated valve, the
valveisnolongercapableofrunningwithoutbeinglu-
bricated from the outside.  Do not leave the valve
withoutlubricationbutkeepitlubricated.
c) Donotusespindleoilor machine oil.  Theymay in-
duceexpansionoftherubberparts,whichmaycause
amalfunction.
！
 WARNING:
！
 CAUTION:
！
 WARNING:
！
 WARNING:
！
 CAUTION:

[SM-208676-A/3]
―7
―
ELECTRIC CIRCUITS (Section 5.4)
a) Check for the presenceofanycurrent leak fromthe
external control device because it may cause an er-
roneousvalveoperation.
When a programmable controller or a similar controlde-
vice is used, a current leak may prevent the normal re-
turningofthevalvewhenthesolenoidisde-energized.
b) Restrictiononcurrentleak
When controlling solenoid valves using a programmable
controlleror a similarcontroldevice, makesurethat the
current leak in the programmable controller output is
equal toor less than the level shown inthe tablebelow. 
A current leak larger than the allowable level may cause
anerroneousvalveoperation.
PERIODIC INSPECTION (Section 6.1)
Before providing a maintenance service, cut the power
and the supply of compressed air and confirm the ab-
senceofresidualpressure.
Theaboveisrequiredtoensuresafety.
Regularly perform the daily and periodic inspections to
correctlymaintainproductperformance.
If the productis not correctly maintained , product per-
formance may deteriorate dramatically, resulting in a
shorter service life, fractures of components, and mal-
functions.
DISASSEMBLING AND REASSEMBLING (Section 6.2)
Before disassembling and reassembling solenoid valves,
readtheinstructionmanualcarefullyandunderstandthe
instructions.
A person who disassembles and reassembles a solenoid
valve system needs to have a knowledge for safely per-
formingsuchoperationbasedontheunderstandingabout
the mechanisms and operating principles of solenoid
valves.
Personnel involved ｉｎ this step must have passed the
PneumaticPressureSkillTestClass2orhigher.
！
 CAUTION:
AC100V 3.0mAorlower
AC200V 1.5mAorlower
DC24V 1.8mAorlower
CRcircuit
Leakage
current
Solenoidvalve
Contact
C
R
Programmable
controller
！
 CAUTION:
！
 WARNING:
！
 WARNING:

−8−
INDEX
3KA1,M3KA1
Manual No. SM-208676-A/3
1. PART NAME AND DESCRIPTION 9
2. INTERNATIONAL SYSTEM OF UNITS (SI)
AND PORT INDICATION
2.1 Conversion between International System
of Units (SI) and Conventional Units  10
3. UNPACKING 11
4. INSTALLATION
4.1 Environment  12
4.2 Installation 14
4.3 Piping 15
4.4 Wiring  18
5. OPERATING RECOMMENDATION
5.1 Operation 24
5.2 Manual Override 25
5.3 Air Quality  26
5.4 Electric Circuits  28
6. MAINTENANCE
6.1 Periodic Inspection  29
6.2 Disassembling and Reassembling  30
7. TROUBLE SHOOTING 33
8. PRODUCT SPECIFICATIONS AND HOW TO ORDER
8.1 Product Specifications 34
8.2 How to Order  36
8.3 Consumable parts  39

[SM-208676-A/3]
―9
―
製
品
１
1. PARTNAMEANDDESCRIPTION
No. Part Name explanation
①Valve unit There are direct piping and sub plate piping
②Manual Override It uses case of manual operation. There are a non lock and a lock
formula
③Wire connection It connections to the electric circuit
④Sub plate It is a block for the piping
⑤Piping Port Port pis the supply port ; port R is the exhaust port ; port A and B is
the Output port
⑥Mounting screw There are two every individual valve and it fixes the valve unit on
the various base
Directpipingmanifold
Directpipingunit

[SM-208676-A/3] −10−
SI
単位
２
2. INTERNATIONALSYSTEMOFUNITS(SI)ANDPORTINDICATION
2.1 Conversion between International System of Units (SI) and
Conventional Units
In this manual, values are expressed using the International System of Units
(SI).
Use the table below to convert them into values expressed in conventional
units.
Table of conversion between SI units and conventional units
(The values printed in Bolds fonts are values given in the International System of Units (SI)):
Force
N dyn kgf
1 1×1051.01972×10-1
1×10-5 1 1.01972×10-6
9.80665 9.80665×1051
Stress
Pa or N/m2Mpa or N/mm2kgf/mm2kgf/cm2
1 1×10-6 1.01972×10-7 1.01972×10-5
1×1061 1.01972×10-1 1.01972×10
9.80665×1069.80665 1 1×102
9.80665×1049.80665×10-2 1×10-2 1
Note：1Pa=1N/m2, 1MPa=1N/mm2
Pressure
Pa kPa MPa bar kgf/cm2atm mmH2O mmHg or Torr
1 1×10-3 1×10-6 1×10-5 1.01972×10-5 9.86923×10-6 1.01972×10-1 7.50062×10-3
1×1031 1×10-3 1×10-2 1.01972×10-2 9.86923×10-3 1.01972×1027.50062
1×1061×1031 1×10 1.01972×10 9.86923 1.01972×1057.50062×103
1×1051×1021×10-1 1 1.01972 9.86923×10-1 1.01972×1047.50062×102
9.80665×1049.80665×10 9.80665×10-2 9.80665×10-1 1 9.67841×10-1 1×1047.35559×102
1.01325×1051.01325×1021.01325×10-1 1.01325 1.01323 1 1.03323×1047.60000×102
9.80665 9.80665×10-3 9.80665×10-6 9.80665×10-5 1×10-4 9.67841×10-5 1 7.35559×10-2
1.33322×1021.33322×10-1 1.33322×10-4 1.33322×10-3 1.35951×10-3 1.31579×10-3 1.35951×10 1
Note：1Pa=1N/m2
Example (converting a pressure value):
1kgf/cm2→0.980665Mpa 1MPa →1.01972×10kgf/cm2

[SM-208676-A/3]
―11
―
操
作
３
3. UNPACKING
Bags containing solenoid valves should be opened only
when you are ready to connect the valves tothe pipes
immediatelyafterward.
Ifbagsareopenedbeforethevalvesarereadytobecon-
nectedtothepipes,theentryofforeignmatterfromthe
piping ports could cause the solenoid valves to fail or
malfunction.
a) Check the model number imprinted on the product to make sure that the
product you received is exactly the product you ordered.
b) Check the exterior of the product for any damage.
c) Before using the product, read the supplied documentation.
！
 CAUTION:

[SM-208676-A/3] −12−
INSTALL
A
TION
４
4. INSTALLATION
Ifyouhavetousetheproductunderconditionsthatare
differentfromthespecifiedconditionsorifyouintendto
usetheproductforaspecialapplication,besuretocon-
sultusabouttheproductspecificationsbeforeusingthe
product.
4.1 Environment
a) Inadustyenvironment,foreignmattermayentereven
throughtheexhaustport.
Themovementoftheexhaustvalvecausesarespiratory
actionattheexhaustvalve,whichmaycauseinhalationof
foreignmatterneartheexhaustport.  Thispotentialsit-
uation would be worse if the exhaust port is facing up-
ward.  Attachasilencertotheexhaustportorhavethe
exhaustportfacedownward.
b) Keep the solenoid valve system dry.  Take care to
avoiddirectcontactwithdrippingwaterorsplashesof
cuttingoil.
If the solenoid valve system is wet by a direct contact
withwaterorcuttingoil,anelectricalleakorburntsole-
noid coils may result. Protect the solenoid valve system
byusingacoverorbyinstallingitinsideapaneledcasing.
Ifthecylinderrodissplashedwithcuttingoil,theoilmay
penetrate through the cylinder into the secondary side
piping of the solenoid valve.  This must be prevented to
avoidmalfunctions.  Consultusforpreventivemeasures.
c) Thecoilswillproduceheat.
Particularly if the solenoid valve system is installed in a
controlboardorifthesolenoidcoilsneedtobeenergized
foralongtime,considerprovidingsufficientventilationto
releasetheheat.  Thecoilscangetveryhot.
d) Do not use the solenoid valve system in an atmos-
pherethatincludesacorrosivegasorsolventvapors.
Do not use the solenoid valve system in an atmosphere
that includes a corrosive gas such as the sulfur dioxide
gasorinanatmospherethatincludessolventvapors.
e) Vibrationsandshocks
Do not subject the solenoid valve system to vibrations
50m/s2orstrongerorshocks300m/s2orstronger.
f) Avoidusingthesolenoidvalvesysteminahumiden-
vironment because the humidity is likely to cause
condensationwithachangeinthetemperature.
！
 CAUTION:
！
 CAUTION:

[SM-208676-A/3]
―13―
INSTALL
A
TION
４
.
g) Donotusethenormaltypesolenoidvalvesforanap-
plicationthatrequiresconformitywithexplosion-proof
specifications.  Choose explosion-proof solenoid
valvesinstead.
h) Thepackingandgasketsmaydeterioratesoonerthan
usual if used in an atmosphere with a higher than
normaldensityofozone(forexample,theatmosphere
near a beach or in an area with frequent thunder-
storms).
Consult us forthepacking and gaskets to be used in an
atmospherewithahigherozonedensity.
！
 CAUTION:

[SM-208676-A/3] −14−
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４
4.2 Installation
When installing a solenoid valve unit, never attempt to
holditinpositionbymeansofthepipesconnectedtoit.
Mountthesolenoidvalvebyapplyingthemountingscrews
and/ormountingplatetothesolenoidvalve.
4.2.1 A work space for installation, removal, wiring, and piping opera-
tions should be provided around the installed solenoid valve sys-
tem.
4.2.2 Direct mounting
Use two or four through holes
unit
manifold
！
 WARNING:
4-φ4.5
2-φ3.2

[SM-208676-A/3]
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4.3 Piping
a) Observe the recommended tightening torque when
connectingpipes.
Observing the recommended tightening torque prevents
airleakageanddamagetothescrewthreads.  Toprevent
damagetothescrewthreads,firstuseyourhandtolightly
tightenthescrewandthenuseatooltotightenthescrew
totherecommendedtorque.
b) Make sure that the pipes will not be disconnected at
the joints by mechanical movements, vibrations or
tension.
If the exhaust piping of the pneumatic circuit is discon-
nected,theactuatorspeedcontrolisdisabled.
If the above happens to a chuck holding mechanism, the
chuck will open.  The inadvertent opening of the chuck
maycauseaseriousaccident.
c) When supplying the compressed air for the first time
after completing the piping, be sure to check every
jointinthepipingforairleakage.
d) When supplying the compressed air for the first time
after completing the piping, increase the air pressure
gradually but never introducea highly-pressurized air
suddenly.
A sudden introduction of a highly-pressurized air may
disconnectpipesatjointsand/orcausethetubestojump
around,anyofwhichmaycauseaninjury.
e) Donotdecreasetheinsidediameterofthepipingfrom
anyofthesolenoidvalveexhaustportstoadiameter
lessthantheexhaustpipeconnectingportsize.
Normal operation of the actuator depends on the
smoothnessoftheexhaustflow.  Withamanifoldsystem,
arestrictiontotheexhaustflowmaypreventnormalop-
erationofothersolenoidvalves.
f) Removalofforeignmatter
Rust and other foreign matter in the pneumatic circuit
may cause a malfunction or leakage from the valve seat. 
Insert a filter (maximum allowable particle size 5μm or
less)immediatelyupstreamofthesolenoidvalve.
g) Airsupply
Donotrestricttheflowofairthroughtheairsupplypip-
ing.  Withamanifoldsystemwithmultiplestations,adrop
in the air supply pressure may cause trouble through a
delayintheoperationtiming
Approproate torque
joint screw Approproate torque N･m
M5 1.0 to 1.5
Rc1/8 3 to 5
！
 CAUTION:

[SM-208676-A/3] −16−
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４
4.3.1 Sealant
Refrain applying sealant or seal tape approx.two pitches of thread from the
tip of pipe to avoid some of the sealing substances from falling into piping
system.
4.3.2 Flushing
Before connecting pipes, flush the interiors of the tubes, solenoid valves, and
connected devices to remove foreign matter.
4.3.3 About M5 joint
M5 seal it with gasket (model: FGS). Don’t tight while increasing Pressure.
Consider a trouble of emergency, Design and enforce to be Possible to
remore and mount of a valve.
4.3.4 Blow circuit
Do not open the cylinder port circuit to the air because a drop in the air sup-
ply pressure may cause a malfunction. Select the external pilot type design
instead of the internal pilot type design. The lowest allowable pressure with
the internal pilot type design is 0.2 MPa.
4.3.5 Exhaust port
Minimize the restriction to the flow of the exhaust air because such re-
striction may cause a delay in the cylinder response. If such a delay hap-
pens, the speed needs to be adjusted between the cylinder and solenoid valve.
4.3.6 Pipe connections
(1) Tubes to be used
For use with solenoid valves with one-touch joints, select tubes of the type
specified by us:
Soft nylon tubes (F-1500 Series)
Urethane tubes (U-9500 Series)
(2) For installation at a site that has spatters in the air, select incombustible
tubes or metal pipes.
（Right） （False） （Right） （False）
●SealTape ●Sealant(Pasteorliquid)

[SM-208676-A/3]
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(3) For a piping used for both hydraulic and pneumatic controls, select a hydrau-
lic hose.
When combining a spiral tube with a standard one-touch joint, fix the tube
origin using a hose band. Otherwise the rotation of the tube will decrease
the efficiency of the clamping.
For use in a high-temperature atmosphere, select fastener joints instead of
one-touch joints.
(4) When selecting from tubes commercially available, carefully study the accu-
racy of the outside diameter as well as the wall thickness and the hardness.
The hardness of an urethane tube should be 93°C or more (as measured by
a rubber hardness meter).
With a tube that does not have a sufficient accuracy of the outside diameter
or the specified hardness, a decrease in the chucking force may cause dis-
connection or difficulty in inserting.
Tube dimensions
Outside diameter
mm
Inside diameter mm
Nylon Urethane
φ4 φ2.5 φ2
φ6 φ4 φ4
φ8 φ5.7 φ5
φ10 φ7.2 φ6.5
(5) Minimum bending radius of tubes
Observe the minimum bending radius of tubes. Neglecting the minimum
bending radius may cause disconnection or leaks.
Tube bore Minimum bending radius mm
Nylon Urethane
φ4 10 10
φ6 20 20
φ8 30 30
φ10 40 40
(6) Cutting a tube
To cut a tube, use a tube cutter to cut the tube perpendicularly to the length
of the tube. Inserting an obliquely cut end of a tube may cause air leakage.
(7) Tube connections
Do not bend a tube immediately at where it is connected to the joint but lead
it out straight from the end of the joint for a length equal to or greater than
the outside diameter of the tube. The tension applied sideways through the
tube should not exceed 40N.
(8) Blank plug to be used
For use with a solenoid valve with a one-touch joint, select the blank plug
specified by us: Blank plug GWP□-B Series
Outside diameter allowance
Soft or hard nylon ±0.1mm
Urethane φ4, φ6 +0.1mm
-0.15mm
Urethane φ8, φ10 +0.1mm
-0.2mm

[SM-208676-A/3] −18−
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４
4.4 Wiring
Before wiring, read the instruction manual carefully and
understandtheinstructions.
A person who wires needs to have knowledge for safely
performing such operation based on the understanding
aboutthemechanismsandoperatingprinciplesofsolenoid
valves.
Before supplying the power, check the power supply
voltageandthecurrenttype(ACorDC).
1) Caution for wiring
(1) When using the small terminal box and water-proof is required, use cab-tire
cords φ4 to φ6.5 in outer diameter (water-resistance is improved, but not
for outdoor use).
(2) The connector type (C, C1, C2, C3, D, D1, D2, D3) should be used in a place
with little dust and not directly exposed to water and oil.
(3) For the electrical circuit, use a switching circuit free of chattering.
(4) The electrical circuit should have fuses.
(5) Be sure that the operation voltage is within 10% of the rated voltage.
！
 WARNING:
！
 CAUTION:

[SM-208676-A/3]
―19―
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４
2) Wire connection
Name Grommet (standard) Small terminal box Small terminal box
with lamp
Small terminal box
with lamp surge absorber
Option
code No code B L LS
Shape
Circuit
Name Plug-in connector C type
with lead wire
Plug-in connector C type
without lead wire
Plug-in connector C type
with lead wire, lamp
surge absorber
Plug-in connector C type
without leadwire,
lamp surge absorber
Option
code C C1 C2 C3
Shape
Circuit
(
)
(
)
DC
Red
Black
(
〜
)
(
〜
)
A
C
(
〜
)
(
〜
)
AC
(
)
(
)
DC
Red
Black
(
〜
)
(
〜
)
AC
Lead wire
300mm
(20/0.18)
90
°
Lead wire
300mm
(11/0.16)
Lead wire
300mm
(11/0.16)