Pneumatic symbols - ASCO

1 All leaflets are available on: & Engineering Information - 25 Pneumatic COMPONENTSP neumatic symbolsPNEUMATIC ACTUATORS single-acting cylinder rod returned at rest (SER)double-acting cylindernon cushioneddoubled-endedpiston rod cylindersingle-acting cylinderrod out at rest (SES)Double-acting cylinderwith adjustablepneumatic cushioningdouble-actingrotatable cylinderSOLENOID VALVES, CONTROL VALVES, PILOT VALVESP orts/positions:The function of a valve (3/2, 4/2, 5/3 etc.) is indicated by two figures:- the first shows the number of ports, (NB: pilot ports do not count)- the second shows the number of valve : 3/2 = 3 ports - 2 positions.

2 5/3 = 5 ports - 3 positionsThe symbol for the solenoid or the pressure-operated valve has the same number of squares as the valve has right-hand square shows the valve in its non-actuated (rest) position, the left-hand square corresponds to a valve in its actuated (work) positions3 positionsFunction: - NC = normally closed (rest position) - NO = normally open (rest position) - U = universal (pressure supply to any one of the ports)Direction of flow: The arrow in the square shows the direction of flow of the the pipework is shown con-nected to the square representing the valve in its non-actuated position.

3 Connection of supply and exhaust ports:- connected to pressure supply - exhaust wich can be piped - exhaust wich cannot be piped Pilot and return :The method of valve actuation is indicated by symbols added to the pilot control is shown on the left-hand sideand the return on the right-hand :pilot/controlreturndirectsolenoidvalves pringInternal or external pressure supplyinternal external PILOT/CONTROL AND RETURN symbols airoperatedsolenoid pilotoperateddirectsolenoidvalvesolenoid pneumaticdifferentialspringreturnair operatedand springreturn (5/3)solenoid air operated andspring return (5/3)+++++manual operatoron control valve(or position testor)

4 Auxiliarymanual operatoron solenoid valvemanual operatorauxiliarymanual operatoron solenoid valvesymbol for manual operatorauxiliarymanual operatoron solenoid valve- Ports numbers comply with standard ISO 5599 as follows . Main ports: 2/2 - 3/24/2 - 5/2 - 5/31 - 2 - 31 - 2 - 3 - 4 - 51: Supply pressure (NC)2: Outlet3: Exhaust1 : Supply pressure2 - 4: Outlets3 - 5: Exhausts In solenoid valves 3/2 NO, pressure is usually in port 3, exhaust in port A functional symbol of two figures describes pilot ports (12 - 14 or 10).

5 It indicates which ports are acti-vated by signal: - signal 12: activates ports 1 and 2 - signal 14: activates ports 1 and 4 - signal 10: deactivates ports 1 and 2 (2/2 and 3/2 valves)00482GB-2017/R01 Availability, design and specifications are subject to change without notice. All rights leaflets are available on: - General & Engineering InformationPneumatic symbols - Pneumatic COMPONENTSEXAMPLES OF symbols IN THIS CATALOGUE ARE AS FOLLOWS ports/positionsfunctionair operatedSolenoid operated (1)

6 Symbolcontrolreturnsymbolcontrolreturn3/ 2 Direct operatedNF---1210231solenoidspringNO---1 012231solenoidspringU---1210231solenoids pringPilot operatedNF1023121airspring1210231solenoi d / airspringNF2312101airair1210231solenoid / airsolenoid / airNO1221310airspring1023112solenoid / airspring4/214122431airspring12143142sol enoid / airspring5/2141224531airspring122453114s olenoid / airspring122453114airdifferential1214245 31solenoid / airairdifferential245311412airair1224531 14solenoid / airair---122453114solenoid / airsolenoid / airdifferential---122453114solenoid / airsolenoid / air5/3W1121424531closed position (W1)air operated122453114closed position (W1)solenoid operatedW2245311214open position to pressure (W2)air operated122453114open position to pressure (W2)solenoid operatedW3245311214open positon to exhaust (W3)air operated122453114open position to exhaust (W3)solenoid operated(1)

7 With manual operator on solenoid AND MECHANICAL OPERATED SOLENOID VALVES ports/positionsfunctioncommande musculairemechanical controlsymbolcontrolreturnsymbolcontrolr eturn3/2NF231pedalspring231rollerspringN O231manualspring231plungerspring5/2 - 5/3-24531leverspring24531plungerspringAI R SERVICE EQUIPMENT filterregulatorlubricatorFRL unit(simplifieddiagram) Pneumatic ACCESSORIESone wayajustablerestrictor valvesilencernon-returnvalve13 Adjustablepressureswitch231 Pajustablerestrictor valvebi-directionalQuickexhaustvalve132s huttle valveindicatorPNEUMATIC LOGIC (following standard ISO 5784)OR element(sum)1321 YES element(identity)1312programsequencermod ule13timer13 AND element(product)13&2 NOT element(negation)213&memoryrelay1141242( X)(X)singlepulsegenerator130,400482GB-20 17/R01 Availability, design and specifications are subject to change without notice.

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