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 : 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.

2 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)auxiliarymanual operatoron solenoid valvemanual operatorauxiliarymanual operatoron solenoid valvesymbol for manual operatorauxiliarymanual operatoron solenoid valve- Ports numbers comply with standard ISO 5599 as follows.

3 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). 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)symbolcontrolreturnsymbolcontrolretur n3/2 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)

4 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) 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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