Emerson Bettis RPX Series Installation, Operation And Maintenance Manual
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Emerson Bettis RPX Series Installation, Operation And Maintenance Manual

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Installation, Operation and Maintenance Manual
DOC.IOM.BRX.EN Rev. 2
May 2021
Bettis RPX-Series
Rack and Pinion Pneumatic Actuators

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Summary of Contents for Emerson Bettis RPX Series

  • Page 1 Installation, Operation and Maintenance Manual DOC.IOM.BRX.EN Rev. 2 May 2021 Bettis RPX-Series Rack and Pinion Pneumatic Actuators...
  • Page 2 Notes Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Installation, Operation and Maintenance Manual Table of Contents DOC.IOM.BRX.EN Rev. 2 May 2021 Table of Contents Section 1: Introduction General Pneumatic System Recommendations ..........1 1.1.1 Operating Media ................. 2 Section 2: Construction Construction ....................3 Storage ......................3 Section 3: Standard Installation Butterfly Valve Application ................
  • Page 4 Notes Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 This page intentionally left blank.

  • Page 5: Section 1: Introduction

    Installation, Operation and Maintenance Manual Section 1: Introduction DOC.IOM.BRX.EN Rev. 2 May 2021 Section 1: Introduction This Section explains: • General pneumatic system recommendations General Pneumatic System Recommendations All Bettis RPX Pneumatic Actuators are factory lubricated with Castrol LMM grease, and unless the operating environment is extremely harsh, do not require relubrication.

  • Page 6: Operating Media

    Section 1: Introduction Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 1.1.1 Operating Media Use clean, dry or lubricated air or inert gas. Maximum Operating Pressure (MOP) = 8.3 barg / 120 psig. MOP is the pressure required to produce the maximum rated torque at the break position for all actuators.

  • Page 7: Section 2: Construction

    Installation, Operation and Maintenance Manual Section 2: Construction DOC.IOM.BRX.EN Rev. 2 May 2021 Section 2: Construction This Section explains: • General construction principles and storage recommendations Construction Bettis RPX Actuators are designed to be mounted to quarter turn valves either directly or using the correct mounting brackets/adapter and sizing products.

  • Page 8: Section 3: Standard Installation

    Section 3: Standard Installation Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 Section 3: Standard Installation This Section explains how to install the Bettis RPX actuators in most comon applications like: • "In-line" installation on quarter turn valves. •...

  • Page 9: All Quarter Turn Valve Types

    Installation, Operation and Maintenance Manual Section 3: Standard Installation DOC.IOM.BRX.EN Rev. 2 May 2021 3.3 All Quarter-Turn Valve Types Before installing the valve/actuator assembly in a piping system, the disc travel should be verified and adjusted if necessary using the travel stop screws (see Section 5.4, Setting of internal travel stops).

  • Page 10: Non-Standard Installation - Double-Acting And Spring-Return Actuators

    Section 3: Standard Installation Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 Non-standard Installation - Double-Acting and Spring-Return Actuators In circumstances where the actuator is required to be installed in the transverse position i.e. at right angles to the valve bore ("across line" mounting), the actuator must be rotated through 90°.

  • Page 11: Section 4: Disassembly Procedure

    Installation, Operation and Maintenance Manual Section 4: Disassembly Procedure DOC.IOM.BRX.EN Rev. 2 May 2021 Section 4: Disassembly Procedure This Section explains: • How to disassemble an actuator safely. Double-Acting Actuators WARNING Remove air pressure and observe normal safety precautions, including the use of eye protection.

  • Page 12: Single-Acting Actuators

    Section 4: Disassembly Procedure Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 Single-Acting Actuators WARNING Observe safety precautions. Remove air pressure and observe normal safety precautions, including the use of eye protection. Always ensure that Spring-Return actuators are in fail safe position before attempting any maintenance.

  • Page 13: Section 5: Assembly Procedure

    Installation, Operation and Maintenance Manual Section 5: Assembly Procedure DOC.IOM.BRX.EN Rev. 2 May 2021 Section 5: Assembly Procedure This Section explains: • How to reassemble a complete actuator. • How to set the stroke adjustment bolts after reassembly. Assembly Double-Acting Actuators Clean all disassembled items and replace all items as O-rings, bearings, and backing pads as provided in the soft good kit.
  • Page 14 Section 5: Assembly Procedure Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 Fit bottom thrust washer (13) and internal circlip (25) to bottom recess of body to locate the shaft assembly. Fit the O-ring seals (18) on the pistons (3), and grease the rack. Orientate the output shaft at 45°...

  • Page 15: Assembly Spring-Return

    Installation, Operation and Maintenance Manual Section 5: Assembly Procedure DOC.IOM.BRX.EN Rev. 2 May 2021 Assembly Spring-Return 5.2.1 FAIL - CLOSE - Clockwise to CLOSE Follow the steps 1 to 14 of the Double-Acting assembly procedure. For Spring-Return actuators, the following additional actions are required: Turn the pinion (2) clockwise to the close position.

  • Page 16: End Cap Bolt Torque Values

    Section 5: Assembly Procedure Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 For Spring-Return actuators the following additional actions are required: Turn the pinion counterclockwise to the open position. Position the actuator vertically with the piston top in a horizontal plane (make sure that the lower part is placed on a clean surface).

  • Page 17: Spring Allocation

    Installation, Operation and Maintenance Manual Section 5: Assembly Procedure DOC.IOM.BRX.EN Rev. 2 May 2021 Spring Allocation In Spring-Return applications, the number of springs used to determine the torque provided for fail safe applications. For optimal performance, the number of springs used is based on the valve type used using the RPX Actuator Torque Table (normally closed applications): •...

  • Page 18: Setting Of Internal Travel Stops

    Section 5: Assembly Procedure Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 5.4 Setting of Internal Travel Stops The Bettis RPX-Series Actuator is fitted with integral travel stops to enable setting of exact travel for the valve being operated. These stops allow over and under travel adjustment of ±...

  • Page 19: Spring-Return Actuator Fail - Close

    Installation, Operation and Maintenance Manual Section 5: Assembly Procedure DOC.IOM.BRX.EN Rev. 2 May 2021 5.4.2 Spring-Return Actuator FAIL - CLOSE Remove air supply and check actual close position. Apply air to operate the actuator to the open position. Whilst the air supply is maintained, slacken lock nut on the close travel stop (right) as the close position is now able to be adjusted.

  • Page 20: Spring-Return Actuator Fail - Open

    Section 5: Assembly Procedure Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 5.4.3 Spring-Return Actuator FAIL - OPEN Remove air supply and check actual open position. Apply air to operate the actuator to the close position. Whilst the air supply is maintained, slacken lock nut on the open travel stop (left) as the open position is now able to be adjusted.

  • Page 21: Section 6: Maintenance

    Installation, Operation and Maintenance Manual Section 6: Maintenance DOC.IOM.BRX.EN Rev. 2 May 2021 Section 6: Maintenance Maintenance Under normal operating conditions and when basic pneumatic system maintenance procedures are applied, the Bettis RPX Actuator will require minimum maintenance for hundred thousands of cycles. If O-rings wear out and air leakage occurs, a soft goods kit can be ordered.

  • Page 22: Section 7: Parts And Materials

    Section 7: Parts and Materials Installation, Operation and Maintenance Manual May 2021 DOC.IOM.BRX.EN Rev. 2 Section 7: Parts and Materials Notes: Included in repair kits SS = Stainless steel Anodized: 5 - 8 microns + ESPC 60 - 130 microns Zinc - Nickel plated: 8 - 12 microns Anodized Anodized + ESPC 60 - 130 microns...
  • Page 23 Installation, Operation and Maintenance Manual Notes DOC.IOM.BRX.EN Rev. 2 May 2021 This page intentionally left blank.
  • Page 24 P. R. China Székesfehérvár 8000 T +86 22 8212 3300 Hungary The Emerson logo is a trademark and service mark of Emerson Electric Co. T +36 22 53 09 50 Bettis is a mark of one of the Emerson family of companies.

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