FLUID POWER GRAPHIC SYMBOLS
FLUID POWER GRAPHIC SYMBOLS
ANSI Y32.10 GRAPHIC SYMBOLS
ANSI Y32.10 GRAPHIC SYMBOLS
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Fluid power systems are those that transmit and control Fluid power systems are those that transmit and control power through use of a pressurized fluid (liquid or gas) power through use of a pressurized fluid (liquid or gas) within an enclosed circuit.
within an enclosed circuit. T
Typeypes s of of symsymbolbols s comcommonmonly ly useused d in in dradrawinwing g circircuicuitt diagrams for fluid power systems are Pictorial, Cutaway, diagrams for fluid power systems are Pictorial, Cutaway, and Graphi
and Graphic. c. These symboThese symbols are fullls are fully explay explained in theined in the USA Standard Drafting Manual (Ref. 2).
USA Standard Drafting Manual (Ref. 2). 1
1.1.1.1Pi.1Pictoriactorial l symbolsymbols s are are very very usefuuseful l for showing for showing thethe int
intercerconneonnectiction on of of comcomponeponentsnts. . TheThey y are diffiare difficulcult t toto standardize from a functional basis.
standardize from a functional basis. 1
1.1.1.2 .2 CutaCutaway way symbolsymbols s emphasemphasize ize constconstructioruction. n. TheseThese symbols are complex to draw and the functions are not symbols are complex to draw and the functions are not readily apparent.
readily apparent. 1
1.1.1.3 .3 GraphiGraphic sc symbolymbols ems emphasizphasize te the he functifunction aon andnd methods of
methods of operation of operation of components. components. These symbols These symbols areare simp
simple to drawle to draw. . ComponComponent functent functions and methoions and methods of ds of opera
operation are obtion are obvious. vious. GraphiGraphic symbols are cac symbols are capable of pable of crossing language barriers, and can promote a universal crossing language barriers, and can promote a universal understanding of fluid power systems.
understanding of fluid power systems.
Graphic symbols for fluid power systems should be used Graphic symbols for fluid power systems should be used in conjunction with the graphic symbols for other systems in conjunction with the graphic symbols for other systems published by the USA Standards Institute (Ref. 3-7 published by the USA Standards Institute (Ref. 3-7 inclusive).
inclusive). 1
1.1.1.3..3.1 1 ComplComplete graphete graphic symboic symbols are thosels are those, which giv, which givee symbolic representation of the component and all of its symbolic representation of the component and all of its features pertinent to the circuit diagram.
features pertinent to the circuit diagram. 1
1.1.1.3.2 .3.2 SimplSimplified graphic symbified graphic symbols are stylols are stylized versized versionsions of the complete symbols.
of the complete symbols.
1
1.2 .2 ScScoope pe aand nd PuPurprpososee 1.
1.2.1 2.1 Scope Scope – Thi– This stas standard ndard presepresents a nts a syssystem tem of of graphic symbols for fluid power diagrams.
graphic symbols for fluid power diagrams.
1.2.
1.2.1.1.1 1 Elementary Elementary forms forms of of symbols symbols are:are: C
Ciirrccllees s RReeccttaannggllees s AArrccs s DDoottss Sq
Squauareres s TTririananggleles s ArArrorows ws CrCrosossesess
Symbols using words or their abbreviations are avoided. Symbols using words or their abbreviations are avoided. Symbols capable of crossing language barriers are Symbols capable of crossing language barriers are presented herein.
presented herein. Compon
Component function ent function rather than rather than constconstruction isruction is emphasized by the symbol.
emphasized by the symbol. 1.
1.2.2.1.4 1.4 The means of opeThe means of operatinrating fluid powg fluid power compoer componentsnents are shown as part of the symbol (where applicable).
are shown as part of the symbol (where applicable). 1.
1.2.2.1.5 1.5 This stanThis standard shodard shows the basic syws the basic symbols, desmbols, describescribes the principle
the principles on s on which the symbols are based, andwhich the symbols are based, and illu
illustratstrates es some some reprrepresentaesentative tive composcomposite ite symbosymbols.ls. Composite symbols can be devised for any fluid power Composite symbols can be devised for any fluid power component by combining basic symbols.
component by combining basic symbols.
Simplified symbols are shown for commonly used Simplified symbols are shown for commonly used components.
components. 1.2.
1.2.1.6 1.6 This standard proThis standard provides basic symbols, whichvides basic symbols, which differentiate between hydraulic and pneumatic fluid power differentiate between hydraulic and pneumatic fluid power media.
media. 1
1..2.2.2 2 PPururpoposese 1
design, fabrication, analysis, and service of fluid power design, fabrication, analysis, and service of fluid power circuits.
circuits. 1.
1.2.2.3 2.2.3 The purpose of thThe purpose of this standis standard is to prard is to providovide fluide fluid power graphic symbols, which are internationally power graphic symbols, which are internationally recognized.
recognized. 1.
1.2.2.4 2.2.4 The purpose of this standard is to promoteThe purpose of this standard is to promote universal understanding of fluid power systems.
2
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S
Sy
ym
mb
bo
ol
l R
Ru
ulleess
2.
2.1 1 SymSymbolbols s shoshow w conconnecnectiotions, ns, floflow w patpaths, hs, andand funct
functions of componenions of components represets represented. nted. They can indicaThey can indicatete conditions occurring during transition from on flow path conditions occurring during transition from on flow path arrangement
arrangement to to another. another. Symbols Symbols do do not not indicateindicate construction, nor do they indicate values, such as pressure, construction, nor do they indicate values, such as pressure, flow rate, and other component settings.
flow rate, and other component settings. 2.2
2.2 SymSymbolbols s do do not not indindicaicate te loclocatiations ons of of portports,s, direction of shifting spools, or positions of actuators on direction of shifting spools, or positions of actuators on actual components.
actual components. 2.3
2.3 SymSymbolbols s mamay y be be rorotatetated d or or rereveversersed d withwithoutout altering their meaning except in the cases of: a.) Lines to altering their meaning except in the cases of: a.) Lines to Reservoir, 4.1.1; b.) Vented Manifold, 4.1.2.3; c.) Reservoir, 4.1.1; b.) Vented Manifold, 4.1.2.3; c.) Accumulator, 4.2.
Accumulator, 4.2. 2
2.4 .4 LLinine e TTecechnhniqiqueue Keep lin
Keep line widths approe widths approximateximately equally equal. . Line width doesLine width does not alter meaning of symbols.
not alter meaning of symbols. 2.4
2.4..1 1 SoSolilid d LinLine e - - MaMainin 2.4
2.4.2 .2 DaDash sh LiLine ne – – PiPilolott
(Pilot line for control) (Pilot line for control) 2.
2.4.4.3 3 DoDotttted ed LiLinene
(Exhaust or Drain Line) (Exhaust or Drain Line) 2.
2.4.4.4 4 CeCentnter er LiLinene
(Enclosure Outline) (Enclosure Outline) 2.4.5
2.4.5 SensiSensing ng Line Line – – Same Same as as line line which which it it connecconnects.ts.
2.4
2.4.6 .6 LiLinenes s CrCrosossising ng (T(The he inintetersrsecectition on is is nonott necessarily at a 90
necessarily at a 90°°angle.)angle.)
2.4
2.4.7 .7 LiLinenes s JoJoinininingg
2
2.5 .5 BBaassiic c ssymymbboollss. . May be May be shown anshown any suitable size.y suitable size.
2.5
2.5.1 .1 CirCircle cle and and SemSemi-Ci-Circirclele
2.5.
2.5.11.1 .1 LargLarge and small circle and small circles may be used to signies may be used to signifyfy that one component is the “main” and the other that one component is the “main” and the other the auxiliary.
the auxiliary.
2.
2.5.5.2 2 TTririananglglee
2 2.5.5..3 3 AArrrrooww 2. 2.5.5.4 4 SqSquauarree Rectangle Rectangle 2.
2.6 6 LeLetttter cer comombibinanatitionons uss used aed as pas partrts of grs of grapaphihicc symbols are not necessarily abbreviations.
symbols are not necessarily abbreviations. 2.7
2.7 In In mulmultiptiple le enenveveloplope e symsymbolbols, s, the the floflow w condconditiitionon shown nearest an actuator symbol takes place when that shown nearest an actuator symbol takes place when that control is caused or permitted to actuate.
control is caused or permitted to actuate. 2.8
2.8 EacEach h symsymbol bol is is dradrawn wn to to shoshow w normnormal, al, at at resrest, t, oror neutral condition of component unless multiple diagrams neutral condition of component unless multiple diagrams are
are furfurnisnish h shoshown wn varvariouious s phaphases ses of of circircuicuit t opeoperatrationion.. Show an actuator symbol for each flow path condition Show an actuator symbol for each flow path condition possessed by the component.
possessed by the component. 2.9
2.9 An An arrarroow tw thrhrouough gh a sa symymbobol al at at apprpprooxiximamatetely ly 4545 deg
degreerees s indindicaicates tes thathat t the the comcomponeponent nt can be can be adjadjust orust or varied. varied. or or or or
2.
2.10 10 An aAn arrorrow pw paraarallellel tl to to the he shoshort srt side ide of of a sa symbymbol,ol, within the symbol, indicates that the component is within the symbol, indicates that the component is pressure compensated.
pressure compensated.
2.
2.111 1 A liA line tne termierminatnating ing in a in a dot dot to rto reprepreseesent ant a thermometer is the symbol for temperature cause or effect thermometer is the symbol for temperature cause or effect
See T
See Temperature Controls 7emperature Controls 7.9. .9. TeTemperature indicators andmperature indicators and Recorders 9.1.2 and
Recorders 9.1.2 and TTemperature Compensation emperature Compensation 10.10.16.316.3 and 10.16.4.
and 10.16.4. 2.
2.12 12 ExtExternaernal porl ports ats are lre locaocated ted whewhere flre flow low lineiness connect to basic symbol, except where component connect to basic symbol, except where component enclosure symbol is used.
enclosure symbol is used.
External ports are located at intersections of flow lines and External ports are located at intersections of flow lines and component enclosure symbol when enclosure is used, see component enclosure symbol when enclosure is used, see Section 11.
Section 11. 2.
2.13 13 RotaRotating ting shafts shafts are are symbolsymbolized ized by by an an arrow arrow whichwhich indicates direction of rotation (assume arrow on near side indicates direction of rotation (assume arrow on near side of shaft).
of shaft).
3
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3.1
3.1 Line, WLine, Working (morking (main)ain)
3.2
3.2 Line, Pilot Line, Pilot (for (for control)control)
3.3
3.3 Line, Exhaust Line, Exhaust and Liquid and Liquid DrainDrain
3.4
3.4 LiLinene, s, senensisingng, e, etctc. s. sucuch ah as gs gauauge ge lilines nes shashall ll bebe drawn the same as the line to which it connects.
drawn the same as the line to which it connects. 3.5
3.5 Flow Flow DirecDirection of tion of 3.
3.5.5.1 1 PnPneueumamatiticc
3.
3.5.5.2 2 HyHydrdrauaulilicc
3.6
3.6 LinLine, e, PneuPneumatmatic ic (Ou(Outletlet t to to AtAtmosmosphephere)re).. 3.6
3.61.1.1 1 Plain Plain orifice, orifice, unconneunconnectablectable
3.6.
3.6.2 2 ConnConnectaectable ble oriforifice ice (e.(e.g. g. ThrThreadead))
3.7
3.7 LinLine e wiwith th FiFixexed d ReReststricrictitionon
3.
3.8 8 LiLinne, e, FlFleexixiblblee
3.9
3.9 StatiStation, on, TTestiesting, ng, measumeasuremenrement, t, or or powpower er take-take-off.off.
3.9
3.9..1 1 PlPluguggeged d porport.t.
3.9
3.9.2 .2 QuiQuick ck DiDiscscononnenectct
3.9
3.9.3 .3 WiWiththout out CheCheckckss
3.9
3.9.4 .4 WiWith th TTwo wo CheCheckckss
DISCONNECTED DISCONNECTED CONNECTED
3.9
3.9.5 .5 WiWith th One One ChChececk k
3.
3.111 1 RoRotatatiting ng CoCouplupliningg
4
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4
4..1 1 RReesseerrvvooiirr
Note: Reservoirs are conventionally drawn in the Note: Reservoirs are conventionally drawn in the horizontal plane.
horizontal plane. All lines enter and leavAll lines enter and leave from above from above.e. 4.
4.1.1.1 1 ResReservervoir wioir with Conth Connectnecting Liing Lines Abnes Abovove Flue Fluidid Level
Level
Below Fluid Level Below Fluid Level
Show line entering or leaving below reservoir only when Show line entering or leaving below reservoir only when such bottom connection is essential to circuit function. such bottom connection is essential to circuit function. 4.
4.1.1.2 2 SimSimpliplified fied symsymbolbol
The symbols are
The symbols are used as part of a used as part of a complete circuicomplete circuit. t. TheyThey are analogous to the ground symbol of electrical diagrams. are analogous to the ground symbol of electrical diagrams. . . SeSeveveral ral sucsuch h symsymbolbols s mamay y be be useused d in in oneone
4.
4.1.1.2.1 2.1 BeloBelow w Fluid Fluid LevLevelel
4.
4.1.1.2.2 2.2 AboAbove ve Fluid Fluid LevLevelel
(The return line is drawn to terminate at the upright legs of (The return line is drawn to terminate at the upright legs of the tank symbol.)
the tank symbol.) 4.
4.1.1.2.3 2.3 VVented ented ManifManifoldold
4
4.2 .2 AAccccuummuulalattoorr
4.2.
4.2.1 1 AccumAccumulatoulator, r, Spring Spring LoadedLoaded
4.2.
4.2.2 2 AccAccumuumulatlatoror, , Gas Gas ChaChargrgeded
4.2.
4.2.3 3 AccAccumuumulatlatoror, , WWeigeightehtedd
4
4.3 .3 RReecceeiivveerr
4.4
4.4 EneEnergy rgy SouSource rce (Pu(Pump, mp, ComComprepressossor, r, AccAccumuumulatlatoror,, etc.)
etc.)
This symbol may be used to represent a fluid power source This symbol may be used to represent a fluid power source CONNECTED
CONNECTED DISCONNECTEDDISCONNECTED
CONNECTED
CONNECTED DISCONNECTEDDISCONNECTED
V
Simplified Symbol Simplified Symbol Example:
Example:
5
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Devices, which control the physical characteristics of the Devices, which control the physical characteristics of the fluid.
5
5..1 1 HeHeat at EExxcchahangngerer 5
5..11..1 1 HeHeataterer
5
5..11.2 .2 CoCoololerer
Inside triangles indicate heat dissipation. Inside triangles indicate heat dissipation.
(Corners may be filled in to represent triangles.) (Corners may be filled in to represent triangles.) 5.
5.1.3 1.3 TTemperemperature ature ControController ller (The (The tempetemperaturrature e is is to to bebe maintained between two predetermined limits.)
maintained between two predetermined limits.)
5.
5.2 2 FiFiltlter er – – StStraraininerer
5
5. 3 . 3 SSeeppaarraattoorr 5.3
5.3..1 1 WiWith th ManManuaual l DrDraiainn
5.3.
5.3.2 2 WitWith h AutAutomaomatic tic DraDrainin
5.4
5.4 FiFiltlter er – – SepSepararatatoror 5.4
5.4.1 .1 WitWith h ManManual ual DraDrainin
5.4.2
5.4.2 With With AutAutomatic omatic DrainDrain
5.5
5.5 DesDesicciccatoator r (Ch(Chemiemical cal DryDryer)er)
5.
5.6 6 LuLubrbricicaatotorr 5.6
5.6..1 1 LeLess ss DrDraiainn
5.6.
5.6.2 2 WitWith h ManManual ual DraDrainin
6
6..
L
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Deev
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6.
6.1 1 CyCylinlinderders, s, HydrHydraulaulic ic and and PneuPneumatmaticic 6.
6.11.1 .1 SinSingle gle AcActintingg
6.
6.11.2 .2 DoubDouble le ActActinging
6.1
6.1.2.1 .2.1 Single End RSingle End Rodod
6.1
6.1.2.2 .2.2 Double End RDouble End Rodod
Inside triangles Inside triangles indicate the indicate the introduction of heat. introduction of heat. Outside triangles Outside triangles show the heating show the heating medium is liquid. medium is liquid.
Outside triangles Outside triangles show the heating show the heating medium is gaseous. medium is gaseous. or or or or or or
6.1
6.1.2.3 .2.3 Fixed Fixed Cushion, Cushion, Advance Advance and and RetractRetract
6.1
6.1.2.4 .2.4 Adjustable Adjustable Cushion, Cushion, Advance Advance OnlyOnly
6.
6.1.2.1.2.5 5 Use these Use these symbolsymbols when s when diamediameter of ter of rodrod com
comparpared ed to to diadiametmeter er of of borbore e is is sigsignifnificaicant nt toto circuit function.
circuit function.
6.
6.2 2 PrPresessusure re InIntetensnsififieierr
6.3
6.3 SeServrvo o PoPosisititioneoner r (S(Simimplplifiifieded))
6.
6.4 4 DiDiscscrerete te PPososititioionenerr
Combine two or more basic cylinder symbols. Combine two or more basic cylinder symbols.
7
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A
Accttu
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atto
orrs
s a
an
nd
d C
Co
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ollss
7
7..1 1 SSpprriinngg
7
7..2 2 MMaannuuaall
(Us
(Use e as as gegenerneral al symsymbol bol withwithout out indindicaicatiotion n of of spespecificificc type; i.e., foot, hand, leg, arm.)
type; i.e., foot, hand, leg, arm.)
7
7.2..2.1 1 Push Push ButButtonton
7
7.2.2.2 .2 LeLeveverr
7
7.2..2.3 3 PedPedal al or or TrTreadeadlele
7
7.3 .3 MeMechchaaninicacall
7
7..4 4 DDeetteenntt
(Show a notch for each detent in the actual component (Show a notch for each detent in the actual component being sym
being symbolizebolized. d. A short line indicA short line indicates whicates which detent ish detent is in use.)
in use.) DetenDetent mayt may, for conv, for conveniencenience, be positioned one, be positioned on either end of symbol.
either end of symbol. 7
7.5 .5 PrPresessusure re CoCompmpenensasatetedd
7
7.6 .6 ElElececttririccalal 7
7.6..6.1 1 SolenoSolenoid id (Sing(Single le WindiWinding)ng)
7
7.6.2 .6.2 RevReversiersing ng MotorMotor
7
7.7 .7 PiPilolot t PrPresessusurere 7
7.7.7.1 .1 RemRemote ote SupSupplyply NO
NON N CCUSUSHHIION ON CCUSUSHIHIOON, N, ADADVAVANCNCE E AANDND RETRACT RETRACT Pneumatic Pneumatic Hydraulic Hydraulic M M
7
7.7.7.2 .2 InInterternal nal SuSupplpplyy
7
7.7.7.3 .3 ActuActuation ation by by ReleaReleased sed PressPressureure
By R
By Remotemote Exe Exhaust haust By IBy Internal nternal RetuReturnrn
7
7.7.7.4 .4 Pilot Pilot ControControlled, lled, Spring Spring CenterCentereded
Simplified Symbol Simplified Symbol
Complete Symbol Complete Symbol 7
7.7.7.5 .5 PilPilot ot DifDiffeferenrentiatiall
Si
Simpmplilifified ed SySymbmbol ol CoCompmplelete te SySymbmbolol 7
7.8 .8 SoSolelenonoid id PiPilolott 7
7.8..8.1 1 SolSolenoenoid id or or PilPilotot External Pilot Supply External Pilot Supply
Internal Pilot Supply and Exhaust Internal Pilot Supply and Exhaust
7
7.8.2 .8.2 SolSolenoenoid id and and PilPilotot
7
7.9 .9 TheThermal rmal – A – A mecmechanhanicaical dl devevice ice resrespondponding ing toto thermal change.
thermal change. 7
7.9..9.1 1 LocLocal al SenSensinsingg
7
7.9.2 .9.2 With With Bulb Bulb for for RemoRemote te SensinSensingg
7
7..110 0 SSeerrvvoo
(This symbol
(This symbol contaicontains ns reprerepresentatsentation ion for energy for energy inputinput,, command input, and resultant output.)
command input, and resultant output.) 7
7.1.11 1 ComposComposite ite ActuActuators ators (and, (and, or, or, and/or)and/or) Basic . . One signal only causes the
Basic . . One signal only causes the device to operate
device to operate
And . ; One signal and a second And . ; One signal and a second signal both cause the
signal both cause the device to operate. device to operate.
Or . . One signal or the other signal Or . . One signal or the other signal causes the device to operate.
causes the device to operate.
And/Or . . The solenoid and the pilot And/Or . . The solenoid and the pilot or the manual override alone
or the manual override alone causes the device to operate. causes the device to operate.
The solenoid and the pilot The solenoid and the pilot or the manual override or the manual override and the pilot
and the pilot
The solenoid and the pilot The solenoid and the pilot or a manual override and or a manual override and the pilot or a manual the pilot or a manual override alone. override alone.
8
8..
R
Ro
otta
arry
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Deev
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8
8..1 1 BBaassiic c SSymymbbooll
8.
8.11..1 1 WiWith th PoPortrtss
8.
8.1.2 1.2 With With RotatRotating ing Shaft, Shaft, with with contrcontrol ol and and with with DrainDrain
8
8.2 .2 HyHydrdrauaulilic c PuPumpmp 8.2
8.2.1 .1 FiFixed xed DisDisplaplacemcementent 8.2.
8.2.11.1 .1 UnidUnidirectirectionalional
8.2.
8.2.1.1.2 2 BidirBidirectioectionalnal
8.2.2
8.2.2 VVariablariable e DisplaDisplacementcement, , Non-cNon-compenompensatedsated 8.2.2.
8.2.2.1 1 UnidUnidirectirectionalional
S
Siimmpplliiffiieed d CCoommpplleettee 8.2.2.2
8.2.2.2 BidirBidirectioectionalnal
S
Siimmpplliiffiieed d CCoommpplleettee
8.2.3
8.2.3 VVariablariable Die Displacesplacement, ment, PressPressure ure CompeCompensatednsated 8.2.3.1 Unidirectional
8.2.3.1 Unidirectional
S
Siimmpplliiffiieed d CCoommpplleettee 8.2.3.2 Bidirectional
8.2.3.2 Bidirectional
S
Siimmpplliiffiieed d CCoommpplleettee 8.
8.3 3 HyHydrdrauaulilic c MoMototorr 8.3.
8.3.1 1 FixFixed ed DisplaDisplacementcement
8.3.1
8.3.1.2 .2 BidirectionalBidirectional
8.3.2
8.3.2 VVariablariable e DisplaDisplacementcement 8.3.2.1 Unidirectional
8.3.2.1 Unidirectional
8.3.2.2 Bidirectional 8.3.2.2 Bidirectional
8.4
8.4 PuPump mp – – MoMototorr, , HyHydrdrauaulilicc 8.4.
8.4.1 1 OperatOperating ing in in one one direcdirection tion as as a pa pump. ump. OperatOperatinging in the other direction as a motor.
8.4.1
8.4.1.1 .1 Complete Complete SymbolSymbol
8.4.
8.4.1.1.2 2 SimplSimplified ified SymbolSymbol
8.4.2
8.4.2 OperatOperating ing one one direcdirection tion of of flow flow as as either either a a pumppump or as a motor.
or as a motor. 8.4.2.
8.4.2.1 1 ComplComplete ete SymbolSymbol
8.4.2.2
8.4.2.2 SimplSimplified ified SymbolSymbol
8.4.3
8.4.3 OperatOperating ing in in both both direcdirections tions of of flow flow either either as as aa pump or as a motor
pump or as a motor. . (V(Variable displacement, pressureariable displacement, pressure compensated shown.)
compensated shown.) 8.4.3.
8.4.3.1 1 ComplComplete ete SymbolSymbol
8.4.3.2
8.4.3.2 SimplSimplified ified SymbolSymbol
8
8.5 .5 PuPummp p PnPneueumamatticic 8.5.
8.5.1 1 CompreCompressorssor, , FixFixed ed DisplaDisplacementcement
8.5.2
8.5.2 VVacuum acuum Pump, Pump, FixFixed ed DisplaDisplacementcement
8.
8.6 6 MoMototorr, , PnPneueumamatiticc 8.6
8.6..1 1 UnUnididirirecectitionaonall
8.6.
8.6.2 2 BidBidireirectictionalonal
8.
8.7 7 OsOsccilillalatotorr 8.7
8.7..1 1 HydrHydraulaulicic
8.
8.77.2 .2 PnePneumumataticic
8.
8.8 8 MoMototorsrs, , EnEngigineness 8.8
8.8.1 .1 EleElectrctric ic MotMotoror
8.8.2
8.8.2 Heat Heat Engine Engine (E.G. (E.G. internainternal cl combusombustion tion engine.engine.))
9
9..
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meen
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s an
nd A
d Acccceesssso
orriieess
9.
9.1 1 IndIndicaicatinting g and and RecRecordordinging 9.
9.11.1 .1 PrePressussurere
9.
9.11.2 .2 TTempemperaeraturturee
IEC IEC
9.1
9
9..2 2 SSeennssiinngg 9.
9.2.2.1 1 VVenentuturiri
9.2
9.2.2 .2 OriOrififice ce PlaPlatete
9.2
9.2.3 .3 PiPitotot t TTububee
9
9.2.2.4 .4 NNozozzlzlee
H
Hyyddrraauulliic c PPnneeuummaattiicc 9
9.3 .3 AAcccceessssooririeess 9.3
9.3..1 1 PrPresessusure re SwSwititchch
9
9.3.3.2 .2 MuMufffflelerr
1
10
0..
V
Va
allv
veess
A basic valv
A basic valve symbol is e symbol is compocomposed of sed of one or one or moremore envelopes with lines inside the envelope to represent flow envelopes with lines inside the envelope to represent flow paths and
paths and flow conditioners flow conditioners between pobetween ports. rts. Three symbolThree symbol systems are used to represent valve types: single envelope, systems are used to represent valve types: single envelope, both finite and infinite position; multiple envelope, finite both finite and infinite position; multiple envelope, finite position; and multiple envelope, infinite position.
position; and multiple envelope, infinite position. 10
10..1 1 In iIn infinnfinite pite posiositiotion sinn single egle envnveloelope vpe valalveves, ths, thee envelope is imagined to move to illustrate how pressure or envelope is imagined to move to illustrate how pressure or flow conditions are controlled as the valve is actuated. flow conditions are controlled as the valve is actuated. 10
10.2 .2 MulMultiptiple enle enveveloplopes symes symbolbolize vize valalveves pros providvidinging more tha
more than one finite flon one finite flow path option fw path option for the fluid. or the fluid. TheThe
10.
10.3 3 MultiMultiple ple envenvelope elope valvalves ves capablcapable of e of infiniinfinitete positioning between certain limits are symbolized as in positioning between certain limits are symbolized as in 10.2 above with the addition of horizontal bars, which are 10.2 above with the addition of horizontal bars, which are drawn parallel t
drawn parallel to the envo the envelope. elope. The horizontal bars are theThe horizontal bars are the clues to the infinite positioning function possessed by the clues to the infinite positioning function possessed by the valve represented.
valve represented. 1
10.0.4 4 EnEnvevelolopepess
1
1005 5 PPoorrttss
10
10.6 .6 PorPorts, ts, IntInternaernalllly y BloBlockckeded
Sy
Symbmbol ol SySyststem em 1100..1 1 SymbSymbol ol SSyyststem em 1100.2.2
10.
10.7 7 Flow Flow PathsPaths, In, Internallternally Open y Open (Symbo(Symbol Syl System stem 1010.1.1 and 10.2)
and 10.2)
10.
10.8 8 Flow Flow PathsPaths, I, Internalnternally ly Open Open (Symbo(Symbol Sl Systeystem m 1010.3).3)
10.9
10.9 TTwo-wo-WWay ay VaValves lves (2 (2 Ported Ported VValves)alves) 10.
10.9.9.1 1 On-Off (On-Off (Manual Manual Shut OfShut Off)f) Simplified Simplified Symbol Symbol System System 10.2 10.2 Symbol Symbol System System 10.1 10.1
On On 1 10.0.92 92 ChChececk k Simplified Simplified Composite Symbol.
Composite Symbol. Flow tFlow to the o the right is right is blocked. blocked. Flow toFlow to the left is permitted.
the left is permitted.
10
10.93 .93 Check, Check, PilotPilot-Opera-Operated ted to to OpenOpen
10
10.94 .94 Check, Check, PilotPilot-Opera-Operated ted to to CloseClose
10.9.5
10.9.5 TTwo-wo-WWay ay VaValveslves 10.9.5.
10.9.5.1 1 TTwo-Positiwo-Positionon
10.9.5.2 Infinite Position 10.9.5.2 Infinite Position
10
10..10 10 ThrThree-ee-WWay ay VValalvevess 10
10.1.10.0.1 1 TTwo wo PosiPositiontion 10.
10.10.10.1.1.1 1 Normally OpenNormally Open
10.
10.10.10.1.2 1.2 Normally ClosedNormally Closed
10
10.1.10.0.1.1.3 3 (Dist(Distributoributor r PressPressure ure is is distdistributed first ributed first to to oneone port, then the other).
port, then the other).
10.1
10.10.1.4 0.1.4 TTwo-Pressuwo-Pressurere
10
10.1.10.2 0.2 Double CheDouble Check Vck Valvalve – Double chee – Double check vack valvlves canes can be built with and wi
be built with and without “cross bleed”. thout “cross bleed”. Such valSuch valves withves with two poppets do not usually allow pressure to momentarily two poppets do not usually allow pressure to momentarily “cross bleed” to r
“cross bleed” to return during transition. eturn during transition. VValves alves with onewith one poppet may allow “cross bleed” as these symbols poppet may allow “cross bleed” as these symbols illustrate.
illustrate. 10.
10.10.2.10.2.1 1 Without Cross Bleed (One way flow).Without Cross Bleed (One way flow).
10.
10.10.2.2 10.2.2 With Cross Bleed (Reverse flow permitted).With Cross Bleed (Reverse flow permitted).
N
Noorrmmaalllly y CClloosseed d NNoorrmmaalllly y OOppeenn
N
10.
10.111 1 Four-Four-WaWay y VaValveslves 10.
10.111.1.1 1 TTwo-Positiwo-Positionon
10.
10.111.2 1.2 Three Three PositionPosition (a)
(a) NormNormalal
(b)
(b) ActuaActuated ted LeftLeft
(c)
(c) ActuaActuated ted RightRight
10.
10.111.3 1.3 TTypical Flow Paths ypical Flow Paths for Center Condition for Center Condition of of Three-Position Valves
Three-Position Valves
10.
10.111.4 1.4 TTwo-Positiwo-Position, Snap Action with Ton, Snap Action with Transition.ransition. As the valve element shifts from one position to the other, As the valve element shifts from one position to the other, it passes through an i
it passes through an intermediate position. ntermediate position. If it is essentiIf it is essentialal to circuit function to symbolize this “in transit” condition, to circuit function to symbolize this “in transit” condition, it can be shown in the center position, enclosed by dashed it can be shown in the center position, enclosed by dashed lines.
lines.
T
Typical Transition ypical Transition SymbolSymbol
10
10.1.12 2 InfiniInfinite te PosiPositionintioning g (betw(between een open open and and closeclosed)d) 10
10.1.12.2.1 1 NormalNormally ly ClosedClosed
10
10.1.12.2 2.2 NormalNormally ly OpenOpen
10
10..13 13 PrePressussure re ConControtrol l VValalvevess 10
10.1.13.3.1 1 PressPressure ure ReliRelief ef
10
10..1313.2 .2 SeqSequenuencece
Normal Normal Actuated Actuated Simplified Symbol Simplified Symbol Denotes Denotes Normal
Normal ActuatedActuated (Relieving) (Relieving)
10.
10.13.3 13.3 Pressure Pressure ReducingReducing
10.
10.13.4 13.4 Pressure RPressure Reducing and educing and RelievingRelieving
10
10.1.13.5 3.5 AirlAirline ine PressuPressure re RegulRegulator ator (Adj(Adjustablustable,e, Relieving)
Relieving)
10.
10.14 14 Infinite Infinite Positioning Positioning Three-WThree-Way ay VValvesalves
10.
10.15 15 Infinite Infinite Positioning Positioning Four-Four-WWay ay VValvesalves
10
10.1.16 6 FloFlow w ContrControl ol VValvalves es (See (See 3.7)3.7) 10
10.1.16.1 6.1 AdjuAdjustablestable, , Non-CNon-Compensompensated (Flow ated (Flow contrcontrol ol inin each direction)
each direction)
10
10.1.16.2 6.2 AdjuAdjustable stable with with BypassBypass
10
10.1.16.3 6.3 AdjuAdjustable and Pressurstable and Pressure Compensatee Compensated withd with Bypass
Bypass
10
10..116.4 6.4 AdjAdjustustablable, e, TTempemperaeraturture e and and PrePressussurere Compensated
Compensated
1
11.
1.
Re
Rep
prreese
sen
ntta
attiiv
ve
e C
Co
om
mpo
possiitte
e Sy
Sym
mbo
bollss
1
111..1 1 CoCompmpononenent t EncEnclolosusurere
Component enclosure may surround a complete symbol or Component enclosure may surround a complete symbol or a group of symbols to represent
a group of symbols to represent an assemblyan assembly. . It is used toIt is used to conv
convey ey more more infinformatioormation n about about compocomponent nent connecconnectionstions and
and functfunctions. ions. EnclosEnclosure ure indicaindicates tes extextremiremity ty of of
Flow is controlled to Flow is controlled to the right.
the right. Flow to Flow to thethe left bypasses control. left bypasses control.
1
111.2 .2 AirAirlinline Ace Accescessorisories (es (FilFilterter, Re, Regulgulatoator anr andd Lubricator) Lubricator) Composite Composite Simplified Simplified
1
111.3 .3 PuPumpmps s anand d MoMototorsrs 1
111.3.3..1 1 PuPumpmpss 1
11.3.1.3.1.1.1 1 Double, Fixed Displacement, One Double, Fixed Displacement, One Inlet and TwInlet and Twoo Outlets.
Outlets.
1
11.3.1.3.1.2 1.2 Double, with Integral ChDouble, with Integral Check Unloading and Teck Unloading and Twowo Outlets
Outlets
1
11.31.3.1.1.3 .3 IntegrIntegral al VVariablariable e FloFlow w Rate Rate ContrControl ol withwith Overload Relief
Overload Relief
1
111.3..3.11.4 .4 VVariariablable e DisDisplaplacemcement ent with with IntIntegraegrall Replenishing Pump and Control Valves
1
11.4.6 1.4.6 TTwo-Positiwo-Positions, Four ons, Four Connection Solenoid, Connection Solenoid, and Piloand Pilot Actt Actuated, with uated, with Manual Pilot Manual Pilot Override.Override.
Simplified Symbol Simplified Symbol
Complete Symbol Complete Symbol
1
111.4 .4 VValalvveses 1
11.41.4.1 .1 ReliRelief, ef, BalancBalanced ed TTypeype
1
11.41.4.2 .2 RemoRemote Opte Operateerated Seqd Sequence uence with Iwith Integral ntegral Check Check
1
11.41.4.3 .3 RemoRemote and Direct Operte and Direct Operated Sequeated Sequence withnce with Differential areas and Integral Check.
Differential areas and Integral Check.
1
11.1.4.4 4.4 PressPressure ure ReducReducing ing with with IntegrIntegral al CheckCheck..
1
111.4..4.5 5 PilPilot ot OperOperateated d ChecCheck k 11
11.4.5.1 .4.5.1 Differential Differential Pilot Pilot Opened.Opened.
11.4.5.2 11.4.5.2
1
11.4.7 1.4.7 TTwo-Positiwo-Position, Five on, Five Connection, Solenoid ContConnection, Solenoid Control Pilot rol Pilot Actuated with Actuated with Detents and Detents and Throttle Throttle Exhaust.Exhaust.
Simplified Symbol Simplified Symbol
Complete Symbol Complete Symbol 1
