Hydraulic Symbols

Graphical Symbols For Hydraulic Circuits Basic symbols PRESSUREORRETURNLINE

PILOTLINE

Spool controls GENERALS YMBOL

Energy transformation FIXEDDISPLACEMENTPUMP ADJUSTABLE 2-WAY FLOWCONTROLWITH REVERSEFLOWCHECK (e.g. 1 VCR...D, 2VCR)

PUSH KNOB SINGLE-ACTINGHANDPUMP (e.g. 376)

TWOORMORE FUNCTIONS INONEUNIT

PUSH-PULLKNOB

FLEXIBLEHOSE

LEVER

UNION

SINGLEACTINGPEDAL

CROSS

DOUBLE ACTINGPEDAL

CLOSEDCONNECTION

PLUNGER

PLUNGERWITH STROKE LIMITATION

DIRECTIONOF ONOF ROTATION

SPRING

REGULATIONPOSS IBLE

ROLLER

ELECTRIC

LEVERWITHROLLER

SOLENOIDS WORKING INOPPOS ITEDIRECTIONS

SINGLES OLENOID

ADJUSTABLE 3-WAY FLOWCONTROLWITH REVERSEFLOWCHECK (e.g. 1 VCR...T, 3VCR)

ADJUSTABLE3 -WAY FLOWCONTROL DOUBLE ACTINGHANDPUMP NGHANDPUMP (e.g. 27906)

DIRECTIONOF MOVEMENT

Energy control

FLOWDIVIDER (e.g. RC...)

SPOOLTYPE FLOWDIVIDER DER (e.g. DC03...)

FIXEDDISPLACEMENTREVERSIBLE MOTORWITHOUT DRAIN

FIXEDDISPLACEMENTREVERSIBLE PUMPWITHDRAIN

DIRECT ACTING RELIEF VALVE (e.g. SGRA...)

PILOTOPERATED RELIEF VALVE (e.g. 3RL...)

SEQUENCE VALVE (e.g. 3RS...)

LEAK-FREESEQUENCE VALVE WITHE XTERNALDRAIN (e.g. 9464)

RELIEF/ UNLOADINGVALVE WITHEXTERNAL HYDRAULIC PILOTANDINTERNALDRAIN (e.g. 3RD...)

DIRECTIONOF ONOF ROTATION LOOKINGAT SHAFT

LOWERING VALVE WITH REVERSEFLOWCHECK (e.g. VF...)

REDUCING VALVE (e.g. 3RR...)

THROTTLEWITH REVERSEFLOWCHECK (e.g. EG...)

ROTARYACTUATOR (e.g. 1APA...) PILOTOPERATEDCHECK VALVE WITHOUTDRAIN (e.g. VRHS...03 )

PUSH/ PULLSOLENOID

ELECTRICALP ROPORTIONAL RELIEF VALVE (e.g. 3RP...)

DOUBLE ACTINGCYLINDER

HYDRAULIC

TESTP OINT

SPRING

PNEUMATIC/ HYDRAULIC OPERATED

OVERCENTRE VALVE (e.g. 2VDF...)

PLUGGEDPORT

INTERMEDIATE POSITION

DOUBLE ACTINGCYLINDER WITHVARIABLEDAMPING ATONEEND

DETENT

RETURNABOVE/ BELOW FLUID LEVEL

DIRECTACTING PROPORTIONAL SOLENOIDDIRECTIONAL VALVE(e. g. EP3D...)

PILOTO PERATED PROPORTIONALSOLENOID DIRECTIONALVALVE (e.g. EP3P...)

AIR/ OILCOOLER

HEATER

TEMPERATURE CONTROLLER

Measuring instruments and indicators PRESSURE INDICATOR

PRESSURE TRANSDUCER

PRESSURE GAUGE (e.g. MGP...)

SERIES DIRECTIONALCO NTROL VALVE WITHNEGATIVE OVERLAP ANDVALVES INSP OOL

FLUIDLEVELTRANSDUCER

THERMOMETER

FLOWINDICATOR

LOGICELEMENT (e.g. 1 LX...)

RELIEFVALVE/ ELECTRICALLOWERINGVALVE (e.g. 2MB...)

PARALLELDIRECTIONAL CONTROLVALVE (e.g. 407..., 1408...)

FLOWMETER

TACHOMETER

SINGLEACTING TELESCOPICCYLINDER

PRIORITY VALVE (e.g. VPD...)

STEERINGUNITS INTERNALP ILOT

DIRECTACTINGSEATED SOLENOIDDIRECTIONAL VALVE(e.g . ECP...)

DOUBLE ACTINGCYLINDER WITHVARIABLEDAMPING ATBOTHENDS

PROPORTIONALS POOL

COUPLING

PILOTOPERATEDSOLENOID DIRECTIONALVALVE (e.g. 5EVP3P2C06...)

PARALLELDIRECTIONAL CONTROL VALVE (e.g. 402..., 1402..., 406..., 1406..., 1504...)

DOUBLE ACTING TELESCOPICCYLINDER ROTARYUNION

DIRECTACTINGS OLENOID DIRECTIONALVALVE (SPOOLFORM2 e.g. 5EVP3D2...)

WATER/ OILCOOLER

(e.g. 101..., 102 ..., 1102.. . SPOOLS AANDB)

CHECKVALVEWITHSP RING

SHUTTLE VALVE OTHERCONTROLUNIT (NOTELECTRICMOTOR)

FILTERWITHINDICATOR (e.g. 1FRF...+ 1FRI-D) DIRECTACTINGS OLENOID DIRECTIONALVALVE (SPOOLFORM1 e.g. 5EVP3D1...)

FLUIDLEVELGAUGE

ELECTRICMOTOR

THROTTLE

FILTER (e.g. 2 FA...)

DIFFERENTIAL PRESSURE GAUGE

PILOTOPERATEDCHECK VALVE WITHDRAIN (e.g. VRHS...02)

DIRECTPILOTOPERATED

SOLENOIDDIVERTERVALVE WITHE XTERNALDRAIN (e.g. M9848...)

BREATHERWITHFILTER

SERIES DIRECTIONAL CONTROLVALVE (e.g. 101..., 102..., 1102...)

SINGLEACTINGCYLINDER PNEUMATIC

SOLENOIDOPERATED6 PORT DIVERTER/ CHANGEOVER VALVE (e.g. M9278...)

ROTARYFLOW DIVIDER (e.g. DSL9-9-9-9R) 9R)

ELECTRICALUNLOADING VALVE (e.g. 3RD...) FIXEDDISPLACEMENTREVERSIBLE MOTORWITHDRAIN

Fluid treatment

NORMALLYOPENS OLENOID CHECK VALVE (e.g. 9526) PARALLELDIRECTIONAL CONTROLVALVE FORUSE WITHLS PUMPS (e.g. 406L..., 1406L..., 1504L...) NORMALLYCLOSEDS OLENOID CHECK VALVE

TORQUE METER