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BIFFI RPD Series Installation, Operation And Maintenance Manual

Double-acting pneumatic actuators
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Biffi RPD
Double-Acting Pneumatic Actuators
Copyright © Biffi. The information in this document is subject to change without notice. Updated data sheets can be obtained from our website www.biffi.it or from your nearest Biffi Center:
Biffi Italia s.r.l. - Strada Biffi 165, 29017 Fiorenzuola d'Arda (PC) – Italy PH: +39 0523 944 411 – biffi_italia@biffi.it
Installation, Operation and Maintenance Manual
MAN 575 Rev. 4
July 2020

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Summary of Contents for BIFFI RPD Series

  • Page 1 Double-Acting Pneumatic Actuators Copyright © Biffi. The information in this document is subject to change without notice. Updated data sheets can be obtained from our website www.biffi.it or from your nearest Biffi Center: Biffi Italia s.r.l. - Strada Biffi 165, 29017 Fiorenzuola d'Arda (PC) – Italy PH: +39 0523 944 411 – biffi_italia@biffi.it...
  • Page 2 Revision Details Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Revision Details Rev. Date Description Prepared Checked Approved July 2020 General update (Migration to new template) April 2016 Updated applicable regulation (chapter 1.1.1) Ermanni Orefici Vigliano October 2014 Updated chapters 1.1.2 and 5.4 Ermanni Cristalli...

  • Page 3: Table Of Contents

    Installation, Operation and Maintenance Manual Table of Contents MAN 575 Rev. 4 July 2020 Table of Contents Section 1: General Warnings Generalities ....................1 1.1.1 Applicable regulation ................. 1 1.1.2 Terms and conditions ................. 2 Identification Plate ..................2 Introducing the Actuator ................3 Data Sheet ....................
  • Page 4 Table of Contents Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Section 4: Operational Tests and Inspections Operational Tests and Inspections ................. 20 Section 5: Maintenance Periodic Maintenance .................. 21 Extraordinary Maintenance ................. 22 5.2.1 Replacement of Cylinder Seals ............22 Lubrication of Mechanism ................

  • Page 5: Section 1: General Warnings

    Biffi Italia s.r.l. pays the highest attention to collecting and verifying the documentation contained in this user manual. However Biffi Italia s.r.l. is not liable for any mistakes contained in this manual, for damage or accidents due to the use of the latter. The information contained is of exclusive reserved ownership of Biffi Italia s.r.l.

  • Page 6: Terms And Conditions

    1.1.2 Terms and conditions Biffi Italia s.r.l. guarantees that all the items produced are free of defects in workmanship and manufacturing materials and meet relevant current specifications, provided they are installed, used and serviced according to the instructions contained in the present manual.

  • Page 7: Introducing The Actuator

    Installation, Operation and Maintenance Manual Section 1: General Warnings MAN 575 Rev. 4 July 2020 Introducing the Actuator RPD actuators are pneumatic low pressure Spring-Return, suitable for any quarter-turn application such as ball, plug, butterfly valves or dampers, in both ON-OFF and modulating heavy-duty service.

  • Page 8: Data Sheet

    Section 1: General Warnings Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Figure 2 View from X View from Y ØE ØF ØC ØC №4 threaded №4 threaded holes holes ØH Threaded hole ØN Joint detail Threaded hole ØN ØM Both the actuator flanges can be used for valve coupling or the mounting of ancillary equipment (positioner, limit switch box, etc.).

  • Page 9: Section 2: Installation

    Installation, Operation and Maintenance Manual Section 2: Installation MAN 575 Rev. 4 July 2020 Section 2: Installation Checks Upon Actuator Receipt • Check that the model, the serial number of the actuator and the technical data reported on the identification plate correspond with those of order confirmation, see Section 1.2.

  • Page 10: Storage

    Section 2: Installation Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 For a correct lifting procedure, please refer to following Figure. Figure 3 1 and 2 = Lifting eyelets Storage If the actuator needs storage, before installation follow these steps: •...

  • Page 11: Actuator Assembly On The Valve

    NOTICE To fix the actuator to the valve flange must be used the stud bolts and nuts supplied by Biffi! In case the actuator is supplied without stud bolts and nuts the following materials must be used as a minimum: •...
  • Page 12 Section 2: Installation Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Figure 5 View from X View from Y ØE ØF ØC ØC №4 threaded №4 threaded holes holes ØH Threaded hole ØN Joint detail ØM Threaded hole ØN Both the actuator flanges can be used for valve coupling or the mounting of ancillary equipment (positioner, limit switch box, etc.).

  • Page 13: Assembly Procedure

    Installation, Operation and Maintenance Manual Section 2: Installation MAN 575 Rev. 4 July 2020 2.4.2 Assembly Procedure NOTICE Failure to comply with the following procedures may impair product warranty. WARNING Installation, commissioning and maintenance, and repair works should be carried out by qualified staff.

  • Page 14: Pneumatic Connections

    Section 2: Installation Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Pneumatic Connections Connect the actuator to the pneumatic feed line with fittings and pipes in accordance to the plant specifications. They must be sized correctly in order to guarantee the necessary air flow for the operation of the actuator, with pressure drops not exceeding the maximum allowable value.

  • Page 15: Commissioning

    (see Section 3.4) Before any modifications please read Biffi Italia s.r.l. Upon actuator commissioning please carry out the following checks: •...

  • Page 16: Section 3: Operation And Use

    Section 3: Operation and Use Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Section 3: Operation and Use Operation Description The air, or supply fluid, pressurizes the cylinder chamber relevant to the operation to carry out (opening or closing). This pressure starts the linear motion of the piston and the consequent rotation motion of the rack and pinion mechanism, to which the valve stem is coupled, in required direction.
  • Page 17 Installation, Operation and Maintenance Manual Section 3: Operation and Use MAN 575 Rev. 4 July 2020 Manual Override for RPD Double-Acting Pneumatic Actuator Actuator manual emergency operation is performed by rotating one of the two jackscrews by a wrench or by a handwheel (available on request). Figure 7 In standard configuration operating the screw mounted in the cylinder end flange results in valve opening while operating the screw mounted in the housing side wall results in the...
  • Page 18 Section 3: Operation and Use Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 ON-OFF service: four way control valve The diagram shows the simplest On-Off control. The gas supply pressure is applied to one side of the cylinder and exhausted from the opposite side. When the control valve (2) is actuated the connections of supply and exhaust to the cylinder chambers are reversed.

  • Page 19: Residual Risks

    Installation, Operation and Maintenance Manual Section 3: Operation and Use MAN 575 Rev. 4 July 2020 Modulating service When modulating control is required as a function of a pneumatic or electric control signal, a positioner (5) is used, which controls the supply to the actuator cylinder to keep the valve in the required angular position.

  • Page 20: Calibration Of The Angular Stroke

    Section 3: Operation and Use Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Calibration of the Angular Stroke It is important that the mechanical stops of the actuator (and not those of the valve) stop the angular stroke at both extreme valve position (fully open and fully closed), except when this is required by the valve operation (e.g.
  • Page 21 Installation, Operation and Maintenance Manual Section 3: Operation and Use MAN 575 Rev. 4 July 2020 Figure 12 Table 5. Without Jackscrew Manual Override Actuator Model Wrench C1 (mm) Wrench C2 (mm) RPD 15 RPD 30 RPD 60 RPD 120 Figure 13 Table 6.

  • Page 22: Calibration Of Micro-Switches (If Foreseen)

    Section 3: Operation and Use Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Calibration of Micro-switches (If Foreseen) (Refer to Safety Instructions Manual for limit switch box) WARNING Refer only to technical documentation related to installed switch-box model. NOTICE For mounting interface dimension of the Limit Switch box on the cover of the actuator, please refer to TN1163V (for metric dimension) or TN1163VU (for imperial dimension).

  • Page 23: Calibration Of The Operation Time

    Calibration of the Operation Time (If required) The calibration of the operation time is made by Biffi Italia s.r.l. according to customer requirements and to technical data-sheet included in technical documentation. If necessary and required from Customer, it should be possible to modify or reset the operating time through flow regulator valves that check the flow quantity on pneumatic supply, refer to Figure 14.

  • Page 24: Section 4: Operational Tests And Inspections

    Section 4: Operational Tests and Inspections Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Section 4: Operational Tests and Inspections NOTICE To ensure the guaranteed SIL grade, according to IEC 61508, the functionality of actuator must be checked with regular intervals of time, as described in the Safety Manual. Operational Tests and Inspections...

  • Page 25: Section 5: Maintenance

    Section 5: Maintenance Installation, Operation and Maintenance Manual MAN 575 Rev. 4 July 2020 Section 5: Maintenance NOTICE Before executing any maintenance operation, it is necessary to close the pneumatic feed line and discharge pressure from the actuator and from the control unit (if foreseen any) to ensure the safety of maintenance staff.

  • Page 26: Extraordinary Maintenance

    Section 5: Maintenance Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Extraordinary Maintenance If there are leaks on RPD actuator or a malfunction in the mechanical components, or in case of scheduled preventive maintenance, the actuator must be disassembled and seals must be replaced with reference to the follow general sectional drawing and adopting the following procedures.
  • Page 27 Section 5: Maintenance Installation, Operation and Maintenance Manual MAN 575 Rev. 4 July 2020 If the sealing washer (17) must be replaced, measure the protrusion of the stop screw (30) with reference to the end flange surface (4), so as to be able to easily restore the setting of the actuator mechanical stop, once the maintenance procedures have been completed.
  • Page 28 Section 5: Maintenance Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Screw the stop screw into the threaded hole of the housing until it reaches its original position (the same protrusion with reference to the housing surface). Check that the sealing washer (17) and the washer (28) are in contact with the housing surface.
  • Page 29 Section 5: Maintenance Installation, Operation and Maintenance Manual MAN 575 Rev. 4 July 2020 Figure 15 Table 7. Item Description Housing Pinion Piston End flange Rack Shaft Cylinder gasket Shoulder washer Cylinder tube Tie rod Thrust bearing screw Sealing washer Sealing washer Sliding block Piston guide sliding ring...

  • Page 30: Lubrication Of Mechanism

    Section 5: Maintenance Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Lubrication of Mechanism For normal duty the rack and pinion mechanism of the actuator is lubricated "for life". In case of high load and high frequency of operation it may be necessary to periodically restore lubrication: it is advisable to apply a generous coating of grease on the contact surfaces of moving parts, especially on the surface of the rack in contact with the thrust bearing sliding block and on the teeth of the rack and pinion.

  • Page 31: Dismantling And Demolition

    Section 5: Maintenance Installation, Operation and Maintenance Manual MAN 575 Rev. 4 July 2020 The following grease is used by Biffi for standard working temperature and suggested for relubrication: Manufacturer: AGIP Type: GR MU/EP2 NLGI grade: Worked preparation (dmm): Drop point ASTM (°C):...

  • Page 32: Section 6: Troubleshooting

    Clean or replace the cartridge Actuator does Blocked valve Repair or replace not work Failure of the control system Call Biffi Italia s.r.l. Customer Service Low supply pressure Restore (Section 1.4) Low supply pressure Restore (Section 1.4) Actuator too slow Wrong calibration of flow regulator valves Restore (Section 3.6)

  • Page 33: Section 7: Layouts

    Section 7: Layouts Spare Parts Order For spare parts order to the relevant Biffi office please make reference to Biffi order confirmation concerning all the supply, and serial number of the actuator, refer to Section 1.2 for any specific spare part for a specific actuator model.

  • Page 34: Parts List For Maintenance And Replacing Procedure

    Section 7: Layouts Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Parts List for Maintenance and Replacing Procedure Figure 17 Double-Acting Pneumatic Actuator Table 9. Parts list Item Description Material Housing Nodular cast iron Pinion Nodular cast iron Piston Carbon steel End flange...
  • Page 35 Installation, Operation and Maintenance Manual Section 7: Layouts MAN 575 Rev. 4 July 2020 Figure 18 Double-Acting Pneumatic Actuator with Manual Jackscrew Table 10. Parts list Item Description Material Housing Nodular cast iron Pinion Nodular cast iron Piston Carbon steel End flange Carbon steel Rack...
  • Page 36 Section 7: Layouts Installation, Operation and Maintenance Manual July 2020 MAN 575 Rev. 4 Figure 19 Declutchable Manual Override Table 11. Parts list Item Description Material External body Carbon steel Internal body Carbon steel Scrape ring *Rubber Flap Carbon steel Screw Stainless steel Screw...

  • Page 37: Section 8: Date Report For Maintenance Operations

    Installation, Operation and Maintenance Manual Section 8: Date Report for Maintenance Operations MAN 575 Rev. 4 July 2020 Section 8: Date Report for Maintenance Operations Last maintenance operation date: (in factory, on delivery): ……… exec. by : ………… ……… exec. by : ………… ………...
  • Page 38 VCIOM-03057-EN ©2020 Biffi. All rights reserved. Biffi Italia s.r.l. Strada Biffi 165 The contents of this publication are presented for information purposes only, 29017 Fiorenzuola d’Arda (PC) and while every effort has been made to ensure their accuracy, they are not...

This manual is also suitable for:

Rpd 15Rpd 30Rpd 60Rpd 120

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