rotork GP Series Maintenance Manual
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rotork GP Series Maintenance Manual

rotork GP Series Maintenance Manual

Single-acting and double acting pneumatic actuators
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GP
Range
Pneumatic Actuator
Single-Acting and Double-Acting Configuration
Installation, Commissioning and
Maintenance Manual
Keeping the World Flowing

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Summary of Contents for rotork GP Series

  • Page 1 Range Pneumatic Actuator Single-Acting and Double-Acting Configuration Installation, Commissioning and Maintenance Manual Keeping the World Flowing...

  • Page 2: Table Of Contents

    Rotork fluid systems reserves the right to modify, amend and improve this manual without notice. Installation, Commissioning and Maintenance Manual...

  • Page 3: Introduction

    GP range of actuators. General information designed, built and tested according to the Quality Control on Rotork Fluid Systems actuators are described in the User System, in compliance with the EN ISO 9001:2015 standard Manual, delivered separately.

  • Page 4: General Information

    This manual is produced to enable a competent user to install, Before installing the equipment, verify it is suitable for the operate and maintain the Rotork Fluid Systems GP Actuator intended application. If unsure consult Rotork Fluid Systems. Single- and Double-acting (GP/S and GP/D).

  • Page 5: Health & Safety

    Presence of potential energy (RES_10) during dismantling. Preventive measures Do not disassemble the actuator during dismantling. Follow instructions in the present manual and contact Rotork Fluid Systems. Magnetic Risks Risk Risk of magnetic field/disturbance and exothermic reactions. Fig 5.1 Actuator label...

  • Page 6: Operating Limits

    Operating Limits Tightening Torque Chart Temperature: -30 to +100 °C for standard applications -20 to +100 °C for PED applications RECOMMENDED TIGHTENING TORQUE -40 to +160 °C for low temperature (Class 8.8 bolts) application Bolt Size Ft. Lbs -60 to +160 °C for ultra-low temperature application Design pressure: up to 12 barg.

  • Page 7: Handling & Lifting

    Handling & Lifting • Angle β must be between 0° and 45° as shown below. Only trained and experienced personnel should handle/lift the actuator. The actuator is supplied packed on pallets suitable for normal handling. Handle the actuator with care. Never stack pallets. Direction of Pull Lifting Recommendations...
  • Page 8 Handling & Lifting Fig 7.3 Lifting (single-acting actuator size 200 - 350) Fig 7.2 Lifting (double-acting actuator up to size 161) Fig 7.4 Lifting (double-acting actuator size 200 - 350) Installation, Commissioning and Maintenance Manual...

  • Page 9: Storage

    Storage Long Term Storage Rotork Fluid Systems actuators have been fully tested before If long term storage is necessary, further operations must leaving the factory. be carried out to maintain the actuator in a good working condition: In order to keep the actuator in good condition until installation, at least the following measures are •...

  • Page 10: Installation On Valve

    TAG numbers. position Consult Rotork Fluid Systems for any additional information. • If the assembly is done using an adapter and a coupling joint, assemble the coupling joint onto the valve stem 10.1 Preliminary Actions...

  • Page 11: Removal From Valve

    Removal shall be performed only by qualified staff, wearing/using appropriate personal protection devices. Do not remove the actuator if the valve is blocked in the intermediate position. Contact Rotork Fluid Systems Customer Service. To disassemble the actuator from the valve, proceed as follows: •...

  • Page 12: Operation

    A mechanical visual position indicator directly connected to the valve stem that shows the position of the valve all along the actuator stroke. Upon request, GP series actuators can be equipped with additional accessories (limit switches box, positioner, position transmitter, control panel, etc.) Use only control devices supplied by Rotork Fluid Systems.

  • Page 13: Description

    12.0 Operation The main components of GP/S actuators are shown in The GP/D series actuators are pneumatic double-acting Fig 12.1, Fig 12.2 and Fig 12.3. actuators specifically designed to provide efficiency and reliability in heavy duty services. Actuator general features are the same of the single-acting version, except the spring canister that is replaced by the centre body closure group.

  • Page 14: Operating Description

    Fig 12.3 GP/D (cast body) main components 12.3 Manual Override The GP series can be fitted with an emergency manual override suitable to operate the actuator in the event of fluid supply failure. This device can be of mechanical screw type operated by means of a handwheel, or of hydraulic type, with a hydraulic cylinder operated using a hydraulic hand pump.

  • Page 15: Manual Override

    12.0 Operation 12.4 Mechanical Manual Override Instructions to engage or disengage the override are reported Single-Acting Actuator on the plate installed on manual override: The mechanical manual override can be of three types: • Type M: With a visible jackscrew •...

  • Page 16: Hydraulic Manual Override For

    12.0 Operation Instructions to engage or disengage the override are reported When the manual override is disengaged, the handwheel on the plate installed on manual override: operation is neutral and the actuator can be operated pneumatically. Instructions are reported on the plate installed on manual override: Fig 12.9 Instructions plate for MHD manual override...

  • Page 17: Angular Stroke Setting

    12.0 Operation 12.7 Angular Stroke Setting Certain valves incorporate their own stops. For such valves, it is recommended that the actuator stop bolt positions coincide with the valve stop position. Contact the valve manufacturer to set the valve mechanical stops. An incorrect setting of angular stroke could cause damages to actuator, valve and/or to personnel.
  • Page 18 12.0 Operation 12.7.2 Single-Acting Actuator with M Type Manual To decrease angular stroke, rotate setting dowel (7) clockwise Override, Cylinder Stop Bolt Setting J. Remove pressure Perform the following operations as first setting. K. Verify the newly obtained angular position with one stroke Adjust the setting dowel located in the manual override as L.
  • Page 19 12.0 Operation 12.7.3 Single-Acting Actuator with MH And MHD Type E. Loosen stop nut (6) Manual Override, Cylinder Stop Bolt Setting F. Slowly pressurize the cylinder to detach stop bolt Perform the following operations as first setting. from piston Adjust the stop bolt located in the manual override as follows: Fig 12.12 MHD G.
  • Page 20 12.0 Operation 12.7.4 Single-Acting Actuator with HPA Type Manual Override, Cylinder Stop Bolt Setting Perform the following operations as first setting. Adjust the stop bolt located in the end flange of the hydraulic cylinder, as follows: A. Verify the absence of pressure B.
  • Page 21 12.0 Operation 12.7.5 Single-Acting Actuator, Spring Cartridge H. To decrease angular stroke, rotate stop bolt (7) clockwise Stop Bolt Setting Remove pressure Perform this setting after having set the stop bolt on cylinder. J. Verify the newly obtained angular position with one stroke Adjust stop bolt screwed into the spring cartridge, as follows: K.
  • Page 22 12.0 Operation 12.7.6 Double-Acting Actuator, Cylinder Stop H. Verify the newly obtained angular position with one stroke Bolt Setting Repeat operations A to H, until the desired angle is obtained Perform the following operations as first setting. Adjust the stop bolt located in the end flange of the cylinder as follows: J.
  • Page 23 12.0 Operation 12.7.7 Double-Acting Actuator, Centre Body Closure O. Hold stop bolt (7) with a wrench and carefully tighten Flange Stop Bolt Setting stop nut (6) Perform the following operations after cylinder stop bolt setting. Adjust the stop bolt located in the centre body closure flange as follows: A.
  • Page 24 12.0 Operation 12.7.8 Double-Acting Actuator with HP1 Type Manual E. Verify the newly obtained angular position with one Override, Cylinder Stop Bolt Setting stroke Perform the following operations as first setting. F. Repeat operations A to E, until the desired angle is obtained Adjust the stop bolt located in the end flange of the hydraulic cylinder, as follows:...
  • Page 25 12.0 Operation 12.7.9 Double-Acting Actuator with Type MD Manual H. To decrease angular stroke, rotate stop bolt (7) clockwise Override Stop Bolt Setting Remove pressure Perform the following operations after cylinder stop bolt setting. J. Verify the newly obtained angular position with one stroke Manual override must be disengaged to perform operation.
  • Page 26 12.0 Operation D. Verify the newly obtained angular position with one stroke J. Re-position seal washer (2) and verify it is correctly positioned. Tighten cap nut (1) E. Repeat operations A to E, until the desired angle is obtained F. To decrease angular stroke, rotate stop bolt (5) clockwise G.

  • Page 27: Pneumatic Connections

    12.0 Operation 12.8 Pneumatic Power Supply Verify allowed supply pressure range on actuator label. Inlet port Verify medium composition. Contact Rotork Fluid Systems to check the compatibility with the supply medium. 12.9 Pneumatic Connections Preliminary Operations A. Verify sizes of pipes and fittings per applicable plant specifications B.

  • Page 28: Electrical Connections

    12.0 Operation 12.10 Electrical Connections 12.11 Start Up During the start-up of the actuator, it is necessary to check if: Check electrical components supply voltage, before start-up. • Medium supply pressure is as prescribed • The feed voltage values of electrical components Access to live electrical conductors is forbidden in (solenoid valves coils, limit switches, pressure switches hazardous areas unless done under a special permit.

  • Page 29: Dismantling & Disposal

    Should you require technical assistance or spares, Rotork guarantees For Single-Acting Actuator the best service in the world. Contact your local Rotork representative or the factory direct at the address on the The spring cartridge module could contain potential nameplate, quoting the actuator type and serial number.

  • Page 30: Troubleshooting

    Loss of power pressure exceeds the required valve torque. • Replace seals according instructions reported in • Leakage from cylinder PM-GP-006, PM-GP-007 For other problems, please contact Rotork Fluid Systems Customer Service. Installation, Commissioning and Maintenance Manual...

  • Page 31: Periodic Maintenance

    16.0 Periodic Maintenance Rotork Fluid Systems recommends performing the following checks to help comply with the rules and regulations of the country of final installation: Remove pressure before proceeding with maintenance operations, discharge any accumulators or tanks (if presents), except where otherwise indicated.
  • Page 32 16.0 Periodic Maintenance PM-GP-001 Page: 1/1 Component: Single-Acting actuator Task: Cleaning Double-Acting actuator Equipment, Tools, Materials: Warnings: Air compressor Project documentation (Design and Operating pressure values) Preliminary Operations: Description: Remove electric and pneumatic supply before proceeding. 1. Remove dust from actuator external surface by dust rag and by blowing air Do not polish/rub non-metal surfaces with a dry cloth.
  • Page 33 16.0 Periodic Maintenance PM-GP-002 Page: 1/1 Component: Single-Acting actuator Task: Functional test Double-Acting actuator Equipment, Tools, Materials: Warnings: Chronometer Project documentation (required stroke times) Preliminary Operations: Description: NOTE: Actuator must be connected to the pneumatic supply to perform the following test. 1.
  • Page 34 16.0 Periodic Maintenance PM-GP-003 Page: 1/1 Component: Manual override Task: Manual override functional test Equipment, Tools, Materials: Warnings: Project documentation Preliminary Operations: Description: Opening operation 1. Verify the absence of pressure 2. Verify the actuator is in its fail position, spring relaxed (for Single-Acting actuator) 3.
  • Page 35 16.0 Periodic Maintenance PM-GP-004 Page: 1/1 Component: Electrical components (if present) Task: Check electrical components (if present) and grounding connections Equipment, Tools, Materials: Warnings: Project documentation Preliminary Operations: Description: Switch off electric power supply before working on electrical devices. Read and follow the safety precautions reported in the Manufacturer’s Maintenance Manual. Risk of temporary modification of the component protection.
  • Page 36 16.0 Periodic Maintenance PM-GP-005a Page: 1/1 Component: Hydraulic manual override for single-acting actuator Task: Hydraulic oil replacement Equipment, Tools, Materials: Warnings: Project documentation Wrench Preliminary Operations: Description: Tasks must be executed with the tank in vertical position and with the actuator in fail position. Verify the absence of pneumatic pressure.
  • Page 37 16.0 Periodic Maintenance PM-GP-005b Page: 1/1 Component: Hydraulic manual override for double-acting actuator Task: Hydraulic oil replacement Equipment, Tools, Materials: Warnings: Project documentation Wrench Preliminary Operations: Description: Tasks must be executed with the tank in vertical position. Verify the absence of pneumatic pressure. Correct oil level is approximately 25 mm (1") below the fill/breather port.
  • Page 38 16.0 Periodic Maintenance PM-GP-006 Page: 1/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve Description: Note: the following instructions apply both to Single-Acting and Double-Acting actuator unless otherwise specified. Cut-off power supply and electric power supply (if present) before performing any operation.
  • Page 39 16.0 Periodic Maintenance PM-GP-006 Page: 2/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 11. Unscrew screws (1) and remove position indicator (2) with gasket (3) 12.
  • Page 40 16.0 Periodic Maintenance PM-GP-006 Page: 3/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve Instructions valid only for SINGLE-ACTING ACTUATOR 15.
  • Page 41 16.0 Periodic Maintenance PM-GP-006 Page: 4/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve Instructions valid for SINGLE-ACTING ACTUATOR and DOUBLE EFFECT ACTUATOR 22.
  • Page 42 16.0 Periodic Maintenance PM-GP-006 Page: 5/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 30. Remove O-ring (18) from cover bushing (17), clean the bushing groove, replace new O-ring (18) and lubricate as appropriate 31.
  • Page 43 16.0 Periodic Maintenance PM-GP-006 Page: 6/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 32. Remove yoke group (19) from enclosure 33.
  • Page 44 16.0 Periodic Maintenance PM-GP-006 Page: 7/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 34. Replace yoke group (19) in the enclosure 35.
  • Page 45 16.0 Periodic Maintenance PM-GP-006 Page: 8/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 36. Position the cylinder vertically on suitable wooden support Pay attention to the piston rod.
  • Page 46 16.0 Periodic Maintenance PM-GP-006 Page: 9/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 39. Unscrew nuts (8) 40.

  • Page 47: Grease

    16.0 Periodic Maintenance PM-GP-006 Page: 10/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 44. Hold piston rod (23) with a wrench and unscrew nut (14) 45.
  • Page 48 16.0 Periodic Maintenance PM-GP-006 Page: 11/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 54. Position O-ring (19) on its seat 55.
  • Page 49 16.0 Periodic Maintenance PM-GP-006 Page: 12/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 59. Replace sliding ring (28) and O-ring (29) on piston (27) 60.
  • Page 50 16.0 Periodic Maintenance PM-GP-006 Page: 13/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 63. Restore flange (9) with O-ring (10) 64.
  • Page 51 16.0 Periodic Maintenance PM-GP-006 Page: 14/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 67. Rotate the cylinder clockwise to screw piston rod (23) into guide block (14) 68.
  • Page 52 16.0 Periodic Maintenance PM-GP-006 Page: 15/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve Instructions valid only for SINGLE-ACTING ACTUATOR 70.
  • Page 53 16.0 Periodic Maintenance PM-GP-006 Page: 16/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 76. Replace O-ring (7) 77.
  • Page 54 16.0 Periodic Maintenance PM-GP-006 Page: 17/17 Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 80. With the help of a wench, screw the stop bolt (7) into the cylinder flange 81.
  • Page 55 16.0 Periodic Maintenance PM-GP-007 Page: 1/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve Description: Note: the following instructions apply both to Single-Acting and Double-Acting actuator unless otherwise specified. Cut-off power supply and electric power supply (if present) before performing any operation.
  • Page 56 16.0 Periodic Maintenance PM-GP-007 Page: 2/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 11. Measure length (W) 12.
  • Page 57 16.0 Periodic Maintenance PM-GP-007 Page: 3/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 16. Remove hydraulic cylinder assembly from pneumatic cylinder group 17.
  • Page 58 16.0 Periodic Maintenance PM-GP-007 Page: 4/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 19. Unscrew bolts (6) 20.
  • Page 59 16.0 Periodic Maintenance PM-GP-007 Page: 5/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 23. Remove sliding ring (11) and O-ring (12) 24.
  • Page 60 16.0 Periodic Maintenance PM-GP-007 Page: 6/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 29. Assemble sliding ring (11) and O-ring (12) on piston (13) 30.
  • Page 61 16.0 Periodic Maintenance PM-GP-007 Page: 7/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 34. Assemble end flange and tighten nuts (6) to the recommended tightening torque 35.
  • Page 62 16.0 Periodic Maintenance PM-GP-007 Page: 8/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 38. Assemble seal washer (2) in its correct position and stop bolt (3) to length W 39.
  • Page 63 16.0 Periodic Maintenance PM-GP-007 Page: 9/9 Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement Equipment, Tools, Materials: Warnings: Spare seals Wrench Lifting tools Project documentation Preliminary Operations: Removal from Valve 41. Assemble hydraulic pump (3) with its support and tighten bolts (S) 42.
  • Page 64 17.0 Part List Centre body (Cast iron) Size 085 Fig 17.1 Centre body (Cast iron) (Actuator size 085) ITEM DESCRIPTION ITEM DESCRIPTION O-ring Screw ● Guide bar bushing Screw Yoke bushing Set screw Yoke bushing Circlip Sliding block Sliding block Guide bar Guide block Yoke pin...
  • Page 65 17.0 Part List Centre body (Cast iron) Size 130 Fig 17.2 Centre body (Cast iron) (Actuator size 130) ITEM DESCRIPTION ITEM DESCRIPTION Screw O-ring ● Position indicator Scotch yoke Position indicator gasket Lower bushing ● Parallel pin Screw Screw Gasket ●...
  • Page 66 17.0 Part List Centre body (Welded) Size 65-85-100-130-161-350 Fig 17.3 Centre body (Welded) (Actuator size 065, 85, 100, 130, 161, 350) ITEM DESCRIPTION ITEM DESCRIPTION Screw O-ring ● Position indicator Scotch yoke Position indicator gasket Lower bushing ● Parallel pin Screw Screw Gasket...
  • Page 67 17.0 Part List Centre body (Cast iron) Size 161 Fig 17.4 Centre body (Cast iron) (Actuator size 161) ITEM DESCRIPTION ITEM DESCRIPTION O-ring Screw ● Washer Parallel pin Position indicator seal O-ring ● ● Guide bar bushing O-ring ● Washer Screw Safety valve Set screw...
  • Page 68 17.0 Part List Centre body (Welded) Size 200-201-270-271 Fig 17.5 Centre body (Welded) (Actuator size 200, 201, 270, 271) ITEM DESCRIPTION ITEM DESCRIPTION Guide bar bushing Yoke pin Washer Insert Position indicator gasket Guide block ● Safety valve Parallel pin Cover O-ring ●...
  • Page 69 17.0 Part List Pneumatic cylinder Fig 17.6 Pneumatic cylinder ITEM DESCRIPTION ITEM DESCRIPTION Head flange Screw O-ring Seal support flange ● End flange O-ring ● Cap nut O-ring ● Seal washer/O-ring (**) Bushing ● Stop nut Centring ring Stop bolt Piston rod Screw Adapter flange...
  • Page 70 17.0 Part List Pneumatic cylinder Fig 17.7 Pneumatic cylinder ITEM DESCRIPTION ITEM DESCRIPTION Head flange Screw O-ring Seal support flange ● End flange O-ring ● Cap nut O-ring ● Seal washer/O-ring (**) Bushing ● Stop nut Centring ring Stop bolt Piston rod Screw Adapter flange...
  • Page 71 17.0 Part List Spring container Fig 17.8 Spring container ITEM DESCRIPTION Screw Gasket Head flange Bushing Spring driving flange Elastic pin Stop bolt Washer End flange Seal washer/O-ring ● Plug Spring container Spring ● Recommended spare part = Number of screws depending on size (**) = Number of springs depending on size Keeping the World Flowing...
  • Page 72 17.0 Part List Centre body closure flange Fig 17.9 Centre body closure flange ITEM DESCRIPTION Cap nut Seal washer/O-ring ● Stop nut Stop bolt Flange Screw Guide block plug Gasket/O-ring ● ● Recommended spare part (***) = Number and size of screw depending on arm size Installation, Commissioning and Maintenance Manual...
  • Page 73 17.0 Part List Hydraulic Cylinder for Manual Override Fig 17.10 Hydraulic Cylinder for Manual Override ITEM DESCRIPTION ITEM DESCRIPTION Cap nut Bushing Seal washer/O-ring Head flange ● Stop nut Hex bolt Stop bolt Adapter flange (*) End flange Screw (*) Plug Tie rod Washer...
  • Page 74 17.0 Part List Mechanical Manual Override M-MH Fig 17.11 Mechanical Manual Override M-MH ITEM DESCRIPTION Handwheel (**) Jackscrew 1(*) Screw + Washer Setting dowel O-ring ● Adapter Flange Back plate Bearing Slotted spring pin Front plate O-ring ● O-ring ● ●...
  • Page 75 17.0 Part List Mechanical Manual Override MHD Fig 17.12 Mechanical Manual Override MHD ITEM DESCRIPTION ITEM DESCRIPTION Cap nut Data plate Seal washer Handwheel Stop nut Ring nut Stop bolt Scraper ring ● Wheel Hub O-ring ● O-ring ● Screw Closure flange Ring switch End cap...
  • Page 76 17.0 Part List Spare Parts Mechanical Manual Override MD Fig 17.13 Mechanical Manual Override MHD ITEM DESCRIPTION ITEM DESCRIPTION Cap nut Seal washer Hex screw Stop nut Parallel pin Stop bolt Flange Handwheel O-ring ● Washer Activator O-ring Hex bolt ●...
  • Page 77 In general, there is no need to lubricate the actuator because its mechanism is lubricated for life. The standard grease for Rotork Fluid Systems scotch yoke actuators are shown below. If an alternative was specified and/or supplied, please refer to the job specific documentation.
  • Page 78 Temperature Drop point (IP396): 180 °C 18.2 Hydraulic Oil This is the standard oil specification for Rotork Fluid Systems hydraulic manual override and hydraulic cylinders working at temperature between -20 °C and +100 °C for ATEX and non- ATEX application.
  • Page 79 18.0 Grease & Hydraulic Oil Specification This is the standard oil specification for Rotork Fluid Systems hydraulic manual override and hydraulic cylinders working at temperature between -40 °C and +100 °C for ATEX and non-ATEX application. Manufacturer: MOBIL Trade Name:...
  • Page 80 +44 (0)1225 733200 +44 (0)1225 333467 email mail@rotork.com All Rotork Fluid Systems actuators are manufactured under a third party accredited ISO9001 quality assurance programme. As we are continually developing our products, their design is subject to change without notice. PUB011-004-00 The name Rotork is a registered trademark.

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