Fluid Power Graphic Symbols

Fluid Power Symbols

FLUID POWER GRAPHIC SYMBOLS ANSI Y32.10 GRAPHIC SYMBOLS

1.

Introduction

1.2

Sco Scope and Purp Purpos osee

1.1

General

1.2.1 1.2.1

Scope – This This standard standard presents presents a system system of 

Fluid power systems are those that transmit and control

graphic symbols for fluid power diagrams.

power through use of a pressurized fluid (liquid or gas) within an enclosed circuit. Types ypes of symbol symbolss common commonly ly used used in drawin drawing g circui circuitt diagrams for fluid power systems are Pictorial, Cutaway, and Graphic. Graphic. These symbols symbols are fully fully explained explained in the USA Standard Drafting Manual (Ref. 2). 1.1.1Pi .1.1Pictoria ctoriall symbols symbols are very useful useful for showing the interc interconne onnecti ction on of compone components nts..

They They are difficul difficultt to

standardize from a functional basis. 1.1.2 .1.2

Cutaway Cutaway symbols symbols emphasize emphasize constructio construction. n. These

symbols are complex to draw and the functions are not readily apparent. 1.1.3 .1.3

Graphic Graphic symbol symbolss emphasiz emphasizee the the function function and and

methods of operation of components. These symbols are simple simple to draw. draw.

Component Component functions functions and methods methods of 

1.2.1. 1.2.1.1 1

Elementary forms of symbols are:

Circles Rectangles

Arcs

Dots

Squa Square ress Trian riang gles les

Arro Arrows ws Cros Crosse sess

Symbols using words or their abbreviations are avoided. Symbols capable of crossing language barriers are presented herein. Component Component

function

rather

than

construction construction

is

emphasized by the symbol. 1.2. 1.2.1.4 1.4

The means of operatin operating g fluid power power components components

are shown as part of the symbol (where applicable). 1.2. 1.2.1.5 1.5

This standard standard shows shows the basic symbols, symbols, describes describes

operation operation are obvious. obvious. Graphic Graphic symbols are capable capable of 

the principles principles on which the symbols are based, and

crossing language barriers, and can promote a universal

illustrat illustrates es

understanding of fluid power systems.

Composite symbols can be devised for any fluid power

Graphic symbols for fluid power systems should be used

some

representa representative tive

composite composite

symbols. symbols.

component by combining basic symbols.

in conjunction with the graphic symbols for other systems

Simplified symbols are shown for commonly used

published by the USA Standards Institute (Ref. 3-7

components.

inclusive).

1.2.1.6 1.2.1.6

1.1.3. .1.3.1 1

differentiate between hydraulic and pneumatic fluid power

Complete Complete graphic graphic symbols symbols are those, those, which give give

This standard provides provides basic symbols, which

symbolic representation of the component and all of its

media.

features pertinent to the circuit diagram.

1.2.2 2.2

Purpo urpose se

1.2.2. .2.2.1 1

The purpos purposee of this this stan standa dard rd is to pro provide vide a

1.1.3.2 .1.3.2

Simplified Simplified graphic symbols symbols are stylized stylized versions versions

of the complete symbols. 1.1.1 .1.1.3 .3

Composite Composite graphic symbols symbols are an organizat organization ion

of simplified simplified or complete complete symbols. Composite Composite symbols symbols usually represent a complex component.

system of fluid power graphic symbols for industrial and educational purposes. 1.2.2.2 1.2.2.2 The purpose of this standard is to simplify simplify Page 1 of 24

Fluid Power Symbols

design, fabrication, analysis, and service of fluid power circuits. 1.2.2.3 1.2.2.3 The purpose of this this standard standard is to provid providee fluid power graphic symbols, which are internationally recognized. 1.2.2.4 1.2.2.4 The purpose of this standard is to promote universal understanding of fluid power systems.

Page 2 of 24

Fluid Power Symbols

2.

Symbol Rules

2.1 2.1

Symbol Symbolss show show connec connectio tions, ns, flow flow paths, paths, and

2.5.1 2.5.1

Circle Circle and Semi-C Semi-Circ ircle le

2.5.1 2.5.1.1

Large Large and small circles circles may be used to signify signify

functions functions of components components represented. represented. They can indicate indicate conditions occurring during transition from on flow path arrangement to another.

Symbols do not indicate

construction, nor do they indicate values, such as pressure, flow rate, and other component settings. 2.2

that one component is the “main” and the other

Symbol Symbolss do not indica indicate te locati locations ons of ports, ports,

the auxiliary.

direction of shifting spools, or positions of actuators on actual components. 2.3

Symbol Symbolss may may be rotate rotated d or reve reverse rsed d without without

altering their meaning except in the cases of: a.) Lines to

2.5. 2.5.2 2

Trian riangl glee

2.5. .5.3

Arro rrow

2.5. 2.5.4 4

Squa Squarre

Reservoir, 4.1.1; b.) Vented Manifold, 4.1.2.3; c.) Accumulator, 4.2. 2.4

Line ine Techn echniq ique ue

Keep line line widths approximate approximately ly equal. equal. Line width does not alter meaning of symbols. 2.4. 2.4.1

Soli Solid d Line Line - Main Main

2.4.2 2.4.2

Dash Dash Line Line – Pilo Pilott Rectangle

(Pilot line for control) 2.4. 2.4.3 3

Dott Dotted ed Line Line (Exhaust or Drain Line)

2.4. 2.4.4 4

2.6 2.6

Cent Center er Line Line

symbols are not necessarily abbreviations.

(Enclosure Outline)

2.7 2.4.5

Sensing Sensing Line – Same as line which it connects. connects.

2.4.6 2.4.6

Line Liness

Cros Crossi sing ng

(The (The

inte inters rsec ecti tion on

Lett Letter er com combi bina nati tion onss used used as as part partss of grap graphi hicc

is

not not

°

necessarily at a 90 angle.)

In multip multiple le enve envelop lopee symbol symbols, s, the flow flow conditi condition on

shown nearest an actuator symbol takes place when that control is caused or permitted to actuate. 2.8

Each Each symbol symbol is drawn drawn to show show normal, normal, at rest, rest, or

neutral condition of component unless multiple diagrams are furnis furnish h shown shown variou variouss phases phases of circui circuitt operat operation ion.. Show an actuator symbol for each flow path condition

or

possessed by the component. 2.4.7 2.4.7

2.9

Line Liness Join Joinin ing g

degree degreess indica indicates tes that that the compone component nt can be adjust adjust or varied. or

2.5

An arro arrow thr throu ough gh a sym symbo boll at at appr appro oxima ximate tely ly 45

any suitable size. Basic symb ymbols. May be shown any

Size may be varied for for emphasis or clarity. clarity. Relative sizes sizes should be maintained. (As in the following following example.) example.)

Page 3 of 24

Fluid Power Symbols

2.10 2.10

An arro arrow w para paralle llell to to the the short short side side of a symb symbol, ol,

within the symbol, indicates that the component is pressure compensated.

2.1 2.11

A line line termi terminat nating ing in a dot to repr represe esent nt a

3.6

Line, Line, Pneumat Pneumatic ic (Outle (Outlett to Atmos Atmosphe phere) re)..

3.61. 3.61.1 1

Plain orifice, unconnectable unconnectable

3.6.2 3.6.2

Connecta Connectable ble orifice orifice (e.g. (e.g. Thread Thread))

3.7

Line Line with with Fixe Fixed d Rest Restric ricti tion on

3.8 3.8

Lin Line, Fle Flexibl xiblee

3.9

Station, Station, Testing, esting, measuremen measurement, t, or power power take-off. take-off.

3.9. 3.9.1

Plug Plugge ged d port. port.

3.9.2 3.9.2

Quick Quick Disc Discon onne nect ct

3.9.3 3.9.3

With Without out Check Checkss

thermometer is the symbol for temperature cause or effect

See Temperature Temperature Controls 7.9. 7.9. Temperature Temperature indicators and Recorders 9.1.2 and Temperature Compensation 10.16.3 10.16.3 and 10.16.4. 2.12 2.12

Externa Externall ports ports are are loca located ted where where flow flow line liness

connect to basic symbol, except where component enclosure symbol is used. External ports are located at intersections of flow lines and component enclosure symbol when enclosure is used, see Section 11. 2.13 2.13

Rotating Rotating shafts are symbolized symbolized by an arrow which

indicates direction of rotation (assume arrow on near side of shaft).

3.

Conductor, Fluid

3.1 Line, Working Working (main) (main) 3.2 Line, Pilot (for control) 3.3 Line, Exhaust and Liquid Drain 3.4

Line Line,, sen sensi sing ng,, etc etc.. suc such h as as gau gauge ge lines lines shall shall be

CONNECTED

drawn the same as the line to which it connects. 3.5 Flow Direction Direction of  3.9.4 3.9.4 3.5. 3.5.1 1

Pneu Pneuma mati ticc

3.5. 3.5.2 2

Hydr Hydrau auli licc

Page 4 of 24

With With Two Check Checkss

DISCONNECTED

Fluid Power Symbols

CONNECTED

3.9.5 3.9.5

With With One Chec Check  k  CONNECTED

3.1 3.11

DISCONNECTED

4.1. 4.1.2.1 2.1

Below Below Fluid Level Level

4.1. 4.1.2.2 2.2

Above Above Fluid Level Level

DISCONNECTED

(The return line is drawn to terminate at the upright legs of 

Rota Rotati ting ng Coupl Couplin ing g

the tank symbol.)

4.

Energy Stor torage and Fluid Sto Storage

4.1

Reservoir VENTED

PRESSURIZED

4.1. 4.1.2.3 2.3

Vented Manifold Manifold

4.2

Accumulat lator

Note: Reservoirs are conventionally drawn in the horizontal plane. All lines enter and leave leave from above. above. 4.1. 4.1.1 1

Reserv Reservoir oir with with Connect Connecting ing Lines Lines Abov Abovee Fluid Fluid

4.2.1 4.2.1

Accumulato Accumulator, r, Spring Loaded

4.2.2 4.2.2

Accumu Accumulat lator or,, Gas Charg Charged ed

4.2.3 4.2.3

Accumu Accumulat lator or,, Weighte eighted d

Level

Below Fluid Level

Show line entering or leaving below reservoir only when such bottom connection is essential to circuit function. 4.1. 4.1.2 2

Simpli Simplified fied symbol symbol 4.3

Receiver

The symbols are used as part of a complete circuit. circuit. They

4.4

Energy Energy Source Source (Pump, (Pump, Compre Compresso ssor, r, Accumu Accumulat lator or,,

are analogous to the ground symbol of electrical diagrams.

etc.)

. Seve Several ral such such symbol symbolss

may may be used used in one

This symbol may be used to represent a fluid power source which may be a pump, compressor, or another associated

diagram to represent the same reservoir.

system. HYDRAULIC

Page 5 of 24

PNEUMATIC

Fluid Power Symbols

Simplified Symbol Example:

5.

Fluid Conditioners

Devices, which control the physical characteristics of the fluid.

Page 6 of 24

Fluid Power Symbols

5.1

Heat Heat Exchang hanger er

5.1.1

Heat Heater er

Inside triangles indicate the introduction of heat.

5.1.2

Outside triangles show the heating medium is liquid.

Outside triangles show the heating medium is gaseous.

5.4

Filt Filter er – Separ Separat ator or

5.4.1 5.4.1

With With Manual Manual Drain Drain

5.4.2

With Automatic Automatic Drain

5.5

Desicc Desiccato atorr (Chemi (Chemical cal Dryer) Dryer)

5.6 5.6

Lubr Lubric icaator tor

5.6. 5.6.1

Less Less Drai Drain n

5.6.2 5.6.2

With With Manual Manual Drain Drain

6.

Linear Devices

6.1 6.1

Cylin Cylinder ders, s, Hydraul Hydraulic ic and Pneumat Pneumatic ic

6.1 6.1.1

Single Single Actin Acting g

6.1 6.1.2

Double Double Acting Acting

Cool Cooler er

or Inside triangles indicate heat dissipation.

or

(Corners may be filled in to represent triangles.) 5.1.3 5.1.3

Temperature emperature Controller Controller (The temperatur temperaturee is to be

maintained between two predetermined limits.)

or

5.2 5.2

Filt Filter er – Stra Strain iner er

5. 3

Separator

5.3. 5.3.1

With With Manua Manuall Drai Drain n 6.1.2.1 6.1.2.1 Single End Rod Rod

5.3.2 5.3.2

With With Automa Automatic tic Drain Drain

6.1.2.2 6.1.2.2 Double End Rod Rod

Page 7 of 24

Fluid Power Symbols

6.1.2.3 6.1.2.3

6.1.2.4 6.1.2.4

6.1.2. 6.1.2.5 5

Fixed Cushion, Advance and Retract

7.2.1 .2.1

Push Button Button

7.2.2 .2.2

Leve Leverr

7.2.3 .2.3

Pedal Pedal or Tread Treadle le

7.3

Mech Mechaanica nicall

7.4

Detent

Adjustable Cushion, Advance Only

Use these symbols symbols when

diameter diameter of rod

compar compared ed to diamet diameter er of bore bore is signif significa icant nt to circuit function.

NON NON CUSH USHION

CUSHI USHIO ON, ADVA ADVANC NCE E AND RETRACT

6.2 6.2

6.3

Pres Pressu sure re Inte Intens nsif ifie ierr

Serv Servo o Posi Positi tione onerr (Sim (Simpl plifi ified ed))

(Show a notch for each detent in the actual component being symbolize symbolized. d. A short line indicates indicates which which detent is in use.) Detent Detent may, may, for convenienc convenience, e, be positioned on Hydraulic 6.4 6.4

Pneumatic

Disc Discre rete te Posit ositio ione nerr

either end of symbol. 7.5

Pres Pressu sure re Comp Compen ensa sate ted d

7.6

Elec Electtric rical

7.6.1 .6.1

Solenoid Solenoid (Single (Single Winding) Winding)

7.6.2

Reversi Reversing ng Motor

Combine two or more basic cylinder symbols.

7.

Actuators and Controls

7.1

Spring

7.2

Manual

(Use (Use as gener general al symbol symbol without without indica indicatio tion n of specifi specificc type; i.e., foot, hand, leg, arm.)

Page 8 of 24

M 7.7

Pilo Pilott Pres Pressu sure re

7.7.1 .7.1

Remote Remote Supply Supply

Fluid Power Symbols

Page 9 of 24

Fluid Power Symbols

7.7.2 .7.2

Inter Internal nal Suppl Supply y 7.9

Thermal Thermal – A mechan mechanica icall dev device ice respond responding ing to

thermal change. 7.7.3 .7.3

Actuation Actuation by Released Released Pressure Pressure

By Remot Remotee Exhaust Exhaust

7.7.4 .7.4

7.9.1 .9.1

Local Local Sensin Sensing g

7.9.2

With Bulb for Remote Remote Sensing Sensing

By Internal Internal Return Return

Pilot Controlled, Controlled, Spring Centered Centered 7.10

Servo

Simplified Symbol

(This symbol contains contains representat representation ion for energy input, input, Complete Symbol 7.7.5 .7.5

command input, and resultant output.) 7.11 .11

Pilot Pilot Diffe Differen rentia tiall

Composite Composite Actuators Actuators (and, or, and/or)

Basic . . One signal only causes the device to operate Simp Simpli lifi fied ed Symb Symbol ol

Comp Comple lete te Symb Symbol ol And . ; One signal and a second

7.8

Sole Soleno noid id Pilo Pilott

signal both cause the

7.8.1 .8.1

Soleno Solenoid id or Pilot Pilot

device to operate.

External Pilot Supply Or . . One signal or the other signal causes the device to operate. Internal Pilot Supply and Exhaust

And/Or . . The solenoid and the pilot or the manual override alone causes the device to operate.

7.8.2

Soleno Solenoid id and Pilot Pilot

Page 10 of 24

Fluid Power Symbols

The solenoid and the pilot or the manual override

The solenoid and the pilot

and the pilot

or a manual override and the pilot or a manual override alone.

Page 11 of 24

Fluid Power Symbols

8.

Rotary Devices

8.1

Basic Symb ymbol 8.2.3

Variable ariable Displace Displacement, ment, Pressure Pressure Compensated Compensated

8.2.3.1 Unidirectional 8.1 8.1.1

With With Port Portss

8.1.2 8.1.2

With Rotating Rotating Shaft, with control control and with Drain

Simplified

Complete

8.2.3.2 Bidirectional

8.2

Hydr Hydrau auli licc Pump Pump

8.2.1 8.2.1

Fixed Fixed Displa Displacem cement ent

8.2.1 8.2.1.1

Unidirect Unidirectional ional

8.2.1. 8.2.1.2 2

Simplified 8.3 8.3

Hydr Hydrau auli licc Moto Motorr

8.3.1 8.3.1

Fixed Fixed Displacement Displacement

Complete

Bidirectio Bidirectional nal 8.3.1.2 8.3.1.2 Bidirectional

8.2.2

Variable ariable Displacement Displacement,, Non-compen Non-compensated sated

8.2.2.1 8.2.2.1 Unidirect Unidirectional ional

8.3.2

Variable ariable Displacement Displacement

8.3.2.1 Unidirectional

Simplified

Complete

8.3.2.2 Bidirectional

8.2.2.2 Bidirectio Bidirectional nal

Simplified

Page 12 of 24

Complete

8.4

Pump Pump – Moto Motorr, Hydr Hydrau auli licc

8.4.1 8.4.1

Operating Operating in one direction direction as a pump. pump. Operating Operating

in the other direction as a motor.

Fluid Power Symbols

8.4.1.1 8.4.1.1 Complete Symbol

8.4.1. 8.4.1.2 2

8.4.2

8.6 8.6

Moto Motorr, Pneu Pneuma mati ticc

8.6. 8.6.1

Unid Unidir irec ecti tiona onall

Simplified Simplified Symbol 8.6.2 8.6.2

Bidire Bidirecti ctional onal

8.7 8.7

Osc Oscilla illato torr

8.7. 8.7.1

Hydraul Hydraulic ic

8.7 8.7.2

Pneum Pneumat atic ic

8.8 8.8

Moto Motors rs,, Engi Engine ness

8.8.1 8.8.1

Electr Electric ic Motor Motor

Operating Operating one direction direction of flow as either a pump

or as a motor. 8.4.2.1 8.4.2.1 Complete Complete Symbol

8.4.2.2 Simplified Simplified Symbol

8.4.3

Operating Operating in both directions directions of flow either as a

pump or as a motor. motor. (Variable (Variable displacement, pressure compensated shown.)

IEC

8.8.2

Heat Engine (E.G. internal internal combus combustion tion engine.) engine.)

9.

Instruments an and Ac Accessories

9.1 9.1

Indica Indicatin ting g and Record Recording ing

9.1 9.1.1

Pressu Pressure re

9.1 9.1.2

Tempera emperatur turee

9.1 9.1.3

Flow Flow Meter Meter

8.4.3.1 8.4.3.1 Complete Complete Symbol

8.4.3.2 Simplified Simplified Symbol

8.5

Pum Pump Pneu Pneuma mattic

8.5.1 8.5.1

Compressor Compressor,, Fixed Fixed Displacement Displacement

8.5.2

Vacuum Pump, Fixed Fixed Displacement Displacement

9.1.3.1 9.1.3.1 Flow Rate

Page 13 of 24

Fluid Power Symbols

9.1.3.2 9.1.3.2 Totalizing

Page 14 of 24

Fluid Power Symbols

9.2

Sensing

9.2. 9.2.1 1

Ventu enturi ri

10.3 10.3

Multiple Multiple envelope envelope valves valves capable capable of infinite infinite

positioning between certain limits are symbolized as in 10.2 above with the addition of horizontal bars, which are drawn parallel to to the envelope. envelope. The horizontal bars are the clues to the infinite positioning function possessed by the valve represented.

9.2.2 9.2.2

9.2.3 9.2.3

9.2.4 .2.4

Enve Envelo lope pess

105

Ports

10.6 10.6

Ports, Ports, Interna Internall lly y Block Blocked ed

Pito Pitott Tube ube

Nozzl ozzlee

Hydraulic 9.3

Accessorie ries

9.3. 9.3.1

Pres Pressu sure re Swit Switch ch

9.3.2 .3.2

Muff Muffle lerr

10.

10.4 0.4 Orifi Orifice ce Plate Plate

Pneumatic

Valves

Symb Symbol ol Syst System em 10.1

10.7 10.7

Symb Symbol ol System stem 10.2

Flow Paths, Paths, Internall Internally y Open (Symbol (Symbol System System 10.1 10.1

and 10.2)

Symbol

Symbol

System

System

10.1

10.2

10.8 10.8

Flow Paths, Paths, Internal Internally ly Open (Symbol (Symbol Syste System m 10.3) 10.3)

10.9

Two-W wo-Way Valves Valves (2 Ported Valves)

A basic valve valve symbol is composed composed of one or more envelopes with lines inside the envelope to represent flow paths and flow conditioners between ports. ports. Three symbol systems are used to represent valve types: single envelope, both finite and infinite position; multiple envelope, finite position; and multiple envelope, infinite position. 10. 10.1

In infin infinite ite posi positio tion n single single env envelo elope pe val valve ves, s, the the

envelope is imagined to move to illustrate how pressure or

10.9. 10.9.1 1 On-Off (Manual (Manual Shut Off) Off) Simplified

flow conditions are controlled as the valve is actuated. 10.2 10.2

Multip Multiple le enve envelop lopes es symbol symbolize ize val valve vess provid providing ing

more than than one finite flow flow path option for for the fluid. The multip multiple le enve envelop lopee move movess to repres represent ent how how flow paths paths change when the valving element within the component is

Off 

shifted to its finite positions. Page 15 of 24

Fluid Power Symbols

Page 16 of 24

Fluid Power Symbols

On 10. 10.10

ThreeThree-W Way Valve alvess

10.1 10.10. 0.1 1

Two Position Position

10.10. 10.10.1. 1.1 1 Normally Open 10.92 0.92

Chec Check  k 

Simplified

Composite Symbol. Flow to to the right is blocked. Flow to

10.10. 10.10.1.2 1.2 Normally Closed

the left is permitted.

10.1 10.10. 0.1. 1.3 3 (Distributo (Distributorr Pressure Pressure is distributed distributed first to one port, then the other).

10.93 10.93

Check, Pilot-Opera Pilot-Operated ted to Open 10.10.1.4 10.10.1.4 Two-Pressure wo-Pressu re

10.94 10.94

Check, Pilot-Opera Pilot-Operated ted to Close

10.9.5

Two-W wo-Way Valves Valves

10.1 10.10.2 0.2

Double Check Check Valv Valvee – Double check check valv valves es can

be built with and without without “cross bleed”. Such valves valves with two poppets do not usually allow pressure to momentarily

10.9.5.1 10.9.5.1 Two-Position wo-Position

“cross bleed” to return return during transition. Valves with one poppet may allow “cross bleed” as these symbols illustrate. 10.10.2. 10.10.2.1 1 Without Cross Bleed (One way flow). Normally Closed

Normally Open

10.9.5.2 Infinite Position

10.10.2.2 10.10.2.2 With Cross Bleed (Reverse flow permitted). Normally Closed

Normally Closed

Normally Open

Normally Open

Page 17 of 24

Fluid Power Symbols

10.1 10.11

Four-Wa Four-Way y Valves Valves

10.1 10.11.1 1.1 Two-Position wo-Position Typical Transition Symbol

Normal

Actuated

10.1 10.11.2 Three Position (a) Normal Normal

10.1 10.12 2

Infinite Infinite Positionin Positioning g (between (between open and closed) closed)

10.1 10.12. 2.1 1

Normally Normally Closed

10.1 10.12.2 2.2

Normally Normally Open

10. 10.13

Pressu Pressure re Contro Controll Valve alvess

10.1 10.13. 3.1 1

Pressure Pressure Relief  Relief 

(b) Actuated Actuated Left

(c) Actuated Actuated Right

10.1 10.11.3 Typical Flow Paths for Center Condition of  Three-Position Valves

Simplified Symbol Denotes

Normal

10.1 10.11.4 Two-Position, wo-Position, Snap Action with Transition. Transition. As the valve element shifts from one position to the other, it passes through an intermediate intermediate position. If it is essential essential to circuit function to symbolize this “in transit” condition, it can be shown in the center position, enclosed by dashed lines.

Page 18 of 24

Actuated (Relieving)

10. 10.13.2 13.2

Sequen Sequence ce

Fluid Power Symbols

10.13.3 10.13.3 Pressure Reducing

10.13.4 10.13.4 Pressure Reducing Reducing and Relieving 10.1 10.16.2 6.2

10.1 10.13.5 3.5 Airline Airline

Pressure Pressure

Regulator Regulator

Adjustable Adjustable with Bypass

Flow is controlled to the right. Flow to the left bypasses control.

(Adjustabl (Adjustable, e,

Relieving) 10.1 10.16.3 6.3

Adjustable Adjustable and Pressure Pressure Compensated Compensated with

Bypass

10.14 10.14

Infinite Positioning Three-Way Three-Way Valves

10. 10.16.4

Adjust Adjustabl able, e,

Tempera emperatur turee

and

Pressu Pressure re

Compensated

10.15 10.15

Infinite Positioning Four-W Four-Way Valves

11.

Rep Represen sentative Compos posite Sym Symbol bols

11.1

Comp Compon onen entt Enclo Enclosu sure re

Component enclosure may surround a complete symbol or 10.1 10.16 6

Flow Flow Control Control Valves alves (See 3.7)

a group of symbols to represent an assembly. assembly. It is used to

10.1 10.16.1 6.1 Adjustable Adjustable,, Non-Compens Non-Compensated ated (Flow control control in

convey convey more informatio information n about component component connections connections

each direction)

and

functions. functions.

Enclosure Enclosure

indicates indicates

extremi extremity ty

of 

component or assembly. assembly. External ports are assumed to be on enclosure line and indicate connections to component. Flow lines shall cross enclosure line without loops or dots. Page 19 of 24

Fluid Power Symbols

11.2

Airlin Airlinee

Lubricator) Composite

Simplified

Page 20 of 24

Acces Accessori sories es

(Fil (Filter ter,,

Regul Regulato atorr

and and

Fluid Power Symbols

11.3

Pump Pumpss and and Moto Motors rs

11.3. .3.1

Pump Pumpss

11.3.1 .3.1.4

11.3.1. 1.3.1.1 1 Double, Fixed Displacement, One Inlet and Two Two

11.3.1.2 1.3.1.2 Double, with Integral Ch eck Unloading and Two Two Outlets

Variable ariable

Flow Flow

Rate

Control Control

Displa Displacem cement ent

Replenishing Pump and Control Valves

Outlets.

11.3.1 1.3.1.3 .3 Integral Integral

Variabl ariablee

with

Overload Relief 

Page 21 of 24

with

Integra Integrall

Fluid Power Symbols

11.4.6

Two-Positions, wo-Positions, Four Connection Solenoid, and Pilot Pilot Actuated, Actuated, with Manual Pilot Override.

Simplified Symbol

Complete Symbol

Page 22 of 24

Fluid Power Symbols

11.4

Valv alves

11.4.1 1.4.1

Relief, Relief, Balanced Balanced Type

11.4.2 1.4.2

11.4.4 1.4.4

Pressure Pressure Reducing Reducing with Integral Integral Check. Check.

11.4.5 .4.5

Pilot Pilot Operate Operated d Check  Check 

11.4.5.1 11.4.5.1

Differential Pilot Opened.

Remote Remote Operate Operated d Sequence Sequence with Integral Integral Check 

11.4.5.2

11.4.3 1.4.3

Remote Remote and Direct Operated Operated Sequence Sequence with

Differential areas and Integral Check.

Page 23 of 24

Fluid Power Symbols

11.4.7

Two-Position, wo-Position, Five Connection, Solenoid Control Control Pilot Actuated with Detents and Throttle Exhaust.

Simplified Symbol

Complete Symbol 11.4.8

Variable Pressure Pressure Compensated Compensated Flow Flow Control and Overload Overload Relief.

Page 24 of 24