CKD 4KA3 User manual

ＳＭ−２１５１６３-A/２
ＩＮＳＴＲＵＣＴＩＯＮ ＭＡＮＵＡＬ
ＰＮＥＵＭＡＴＩＣ ＶＡＬＶＥ
４ＫＡ３, ４ＫＢ３
Ｍ４ＫＡ３, Ｍ４ＫＢ３
●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．
 ２ndEdition

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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
following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

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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CATIONnoticesmayresultininjury
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war-
ranty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de-
livered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 :

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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:

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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-215163-A/2] ―5
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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 malf
unction 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:

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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 OPERATING DEVICE (Section 5.2)
a) Oncethemanualoperating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-215163-A/2] ―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 les
s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
4KA3, 4KB3
M4KA3, M4KB3
Manual No. SM-215163-A/2
1. PART NAME AND DESCRIPTION 9
2. INTERNATIONAL SYSTEM OF UNITS (SI)  10
3. UNPACKING 11
4. INSTALLATION
4.1 Environment  12
4.2 Installation 13
4.3 Piping 14
4.4 Wiring  18
5. OPERATING RECOMMENDATION
5.1 Function  23
5.2 Manual Operating Device  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 34
8. PRODUCT SPECIFICATIONS AND HOW TO ORDER
8.1 Product Specifications 35
8.2 How to Order  39
8.3 Consumable parts  47

[SM-215163-A/2] ―9
―
PARTNAME 
ANDDESCRIPTION
１
1. PARTNAMEANDDESCRIPTION
Direct piping unit Direct piping manifold
Subplate piping unit Subplate piping manifold
No. Part Name explanation
①Valve unit There are direct pipng and sub plate piping
②Manual operating device It uses in 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 P is the supply port ; port R is the exhaust port ; port A and B is
the Output port
⑥Mounting screw
There are two
or th
ree
every individual valve and it
fixes the valve unit on the Various base.

[SM-215163-A/2]
−10−
SI
２
2. INTERNATIONALSYSTEMOFUNITS(SI) 
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→0.0980665MPa 1MPa →1.01972×10kgf/cm2

[SM-215163-A/2] ―11
―
UNPACKING
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-215163-A/2]
−12−
INSTALLATION
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-215163-A/2] ―13―
INSTALL
A
TION
４
25
3-φ4.3
mounting holes
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.
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.
.2.2 Direct mounting
1) Direct piping Type
Use 2 or 4 through holes
unit manifold
2) Sub plate piping Type
Use 3 or 4 mounting holes
unit manifold
！
 WARNING:
！
 CAUTION:
4-φ6.6
mounting holes
46.5（08Y：31）
31
4-φ5.5
mounting holes
23
2-φ4.5
mounting holes

[SM-215163-A/2]
−14−
INSTALLATION
４
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
Rc3/8 13 to 15
Rc1/2 16 to 18
！
 CAUTION:

[SM-215163-A/2] ―15―
INSTALL
A
TION
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.
When winding the fluororesin seal tape on the screw part, wind the seal tape two
or three times where one or two screw threads remain at the top end of the screw,
and then push the tape by tip of the nail to make the tape tightly in contact with
the screw. When using the liquid sealant, apply a proper amount of sealant
where one or two screw threads remain at the top end of the screw.
At this time, do not apply the sealant to the female screw parts of the machine.
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 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.
4.3.4 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.
（Right） （False） （Right） （False）
●SealTape ●Sealant(Pasteorliquid)

[SM-215163-A/2]
−16−
INSTALLATION
４
4.3.5 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.
(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.
Outside diameter allowance
Soft or hard nylon ±0.1mm
Urethane φ4, φ6 +0.1mm
-0.15mm
Urethane φ8, φ10 +0.1mm
-0.2mm

[SM-215163-A/2] ―17―
INSTALL
A
TION
４
(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.
(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

[SM-215163-A/2]
−18−
INSTALLATION
４
4.3.6 External pilot (K) piping port
Pilot air is individual supply in the external pilot (K) type. Supply port is Rc1/8, so pay atten-
tion to piping connecting position not to mistake. If it isn’t correctly piped, it causes the mal-
function.
unit
4.4 Wiring
Anelectricalshockhazardexistsduringwiring,ordisas-
sembly or reassembly of the DIN terminal box.  Turn
OFFthepowercompletelybeforestartingsuchwork.
Before supplying the power, check the power supply
voltageandthecurrenttype(ACorDC).
！
 WARNING:
！
 CAUTION:
ExternalpilotSupplyport
Rc1/8

[SM-215163-A/2] ―19―
INSTALL
A
TION
４
1) Caution for wiring
(1) When using the small terminal box and water-proof is required, use cab-tire
cords φ4.5 to φ7 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.
2) Wire connection
Name Grommet (standard) Small terminal box Small terminal box
with indicator light
Small terminal box
with surge suppressor
and indicator light
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, surge
suppressor and indicator
light
Plug-in connector C type
without leadwire,
surge suppressor and
indicator light
Option
code C C1 C2 C3
Shape
Circuit
(
〜
)
(
〜
)
AC
(
〜
)
(
〜
)
AC
(
)
(
)
DC
Red
Black
(
〜
)
(
〜
)
AC
(
)
(
)
DC
(  )
(  )
DC