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Emerson BETTIS CBAX30 Disassembly And Reassembly
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Emerson BETTIS CBAX30 Disassembly And Reassembly

Double-acting series pneumatic actuators
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Service Instructions
137462E Rev. 1
June 2024
Bettis CBAX30 Double-Acting Series
Pneumatic Actuators
Disassembly and Reassembly

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Summary of Contents for Emerson BETTIS CBAX30

  • Page 1 Service Instructions 137462E Rev. 1 June 2024 Bettis CBAX30 Double-Acting Series Pneumatic Actuators Disassembly and Reassembly...
  • Page 2 Service Instructions Notes 137462E Rev. 1 June 2024 This page intentionally left blank.
  • Page 3 Service Instructions Table of Contents 137462E Rev. 1 June 2024 Table of Contents Section 1: Introduction General Service Information ................1 Definitions ........................2 General Safety Information .................3 Bettis Reference Materials ...................3 Service Support Items ..................3 Operating Media .....................3 Lubrication Requirements ...................3 General Tool Information ..................4 Actuator Weight ......................4 1.10...
  • Page 4 Table of Contents Service Instructions June 2024 137462E Rev. 1 Section 6: Troubleshooting Fault Insertion ...................... 25 Operational Test ....................26 Section 7: Removal and Decommissioning Removal and Decommissioning .................. 27 Section 8: Document Revision Document Revision ......................28 Appendix A: List of Tables List of Tables ........................
  • Page 5 Service Instructions Section 1: Introduction 137462E Rev. 1 June 2024 Section 1: Introduction General Service Information • This service procedure is offered as a guide to enable general maintenance to be performed on Bettis™ CBA300 Double-Acting Series Actuators. The following is a list of general CBA300 model numbers: Table 1.
  • Page 6 Section 1: Introduction Service Instructions June 2024 137462E Rev. 1 CAUTION Apply the thread sealant per the manufacturer’s instructions. • Bettis recommends that disassembly of the actuator should be done in a clean area on a workbench. Definitions WARNING: If not observed, user incurs a high risk of severe damage to actuator and/or fatal injury to personnel.
  • Page 7 Operating Media • Recommended to use clean, dry air or inert gas. • Other gases may be used with direction from Emerson Engineering to evaluate any possible restrictions or modifications which may need to be made for compatibility. Lubrication Requirements •...
  • Page 8 Section 1: Introduction Service Instructions June 2024 137462E Rev. 1 1.10 General Tool Information • All threads on CBA300 Series actuators are Inch Unified and NPT. • All tools/Hexagons are American Standard inch. • Suggested tools: Two adjustable wrenches, small standard screwdriver with sharp edges rounded off, medium size standard screwdriver, external snap ring pliers, drive ratchet/deep well socket set and torque wrench up to 339 Nm / 3000 lb-in.
  • Page 9 Service Instructions Section 1: Introduction 137462E Rev. 1 June 2024 Actuator Installation Since there are many valve and actuator combinations, it is not practical to include detailed instructions for each type. Mountings are designed to be as simple as possible to keep the guess work out of the installation. Actuators are shipped from the factory with the travel stops adjusted for approximately ninety-degree rotation.
  • Page 10 Section 1: Introduction Service Instructions June 2024 137462E Rev. 1 NOTE: When actuator is first placed into service, it should be cycled with regulated pneumatic pressure. This is necessary because the seals have been stationary, causing them to take a “set”. Therefore, the actuator should be operated through several cycles to exercise the seals so as to achieve a service ready condition.
  • Page 11 Service Instructions Section 2: Actuator Disassembly 137462E Rev. 1 June 2024 Section 2: Actuator Disassembly General Disassembly WARNING It is possible that the actuator may contain dangerous gas and/or liquids. Ensure that all proper measures have been taken to prevent exposure or release of these types of contaminants before commencing any work.
  • Page 12 Section 2: Actuator Disassembly Service Instructions June 2024 137462E Rev. 1 Pneumatic Cylinder Disassembly NOTE: Review Section 2, steps 2.1.1 through 2.1.3 before proceeding with cylinder disassembly. 2.2.1 Remove hex nut (4-40) as follows: CBA730 through CBA1030 standard end cap stop screw or extended stop (ES), use step 2.2.1.1. CBA730 through CBA1030 with -M3 or -M3HW use step 2.2.1.2.
  • Page 13 Service Instructions Section 2: Actuator Disassembly 137462E Rev. 1 June 2024 2.2.6 On actuator models CBA830, CBA930 and CBA1030, remove cylinder adapter (4-15) from flange of housing (1-10). Model CBA730 is not equipped with a cylinder adapter (4-15). 2.2.7 M3 Jackscrew removal from end cap (4-20). 2.2.7.1 Remove retainer ring (5-60) from M3 adapter (4-55).
  • Page 14 Section 2: Actuator Disassembly Service Instructions June 2024 137462E Rev. 1 NOTE: For CBA730 through CBA1030-M3/M3HW models, the M3 jackscrew (4-30) cannot be removed now. The M3 used in these models can be removed later in this procedureusing step 2.3.9. 2.3.2 Remove center bar (8-10) from housing adapter (6-10).
  • Page 15 Service Instructions Section 3: Actuator Reassembly 137462E Rev. 1 June 2024 Section 3: Actuator Reassembly General Reassembly CAUTION Only new seals that are still within the seals expectant shelf life should be installed into the actuator being refurbished. 3.1.1 Remove and discard all old seals and gaskets. 3.1.2 All parts should be cleaned to remove all dirt and other foreign material prior to inspection.
  • Page 16 Section 3: Actuator Reassembly Service Instructions June 2024 137462E Rev. 1 Housing Reassembly NOTE: Review Section 3, steps 3.1.1 through 3.1.6 before proceeding with actuator reassembly. In Section 3.2 where the step indicates to “lubricate, coat or apply lubricant”, use lubricant as identified in Section 1.7 for lubricating the part being installed.
  • Page 17 Service Instructions Section 3: Actuator Reassembly 137462E Rev. 1 June 2024 NOTE: Move the O-ring seal (7-30) down the ES or stop screw until it is next to the housing adapter (6-10). 3.2.2.3 Install washer (6-90) onto ES or stop screw (6-30). NOTE: Push the washer down the ES or stop screw until it is next to the housing adapter (6-10).
  • Page 18 Section 3: Actuator Reassembly Service Instructions June 2024 137462E Rev. 1 3.2.9 Hold the yoke key (1-40) in position and insert the torque shaft (1-30) into and through housing (1-10) and yoke (1-20). 3.2.10 Install thrust bearing (2-70) onto the upper area of torque shaft (1-30). 3.2.11 Install thrust washer (2-80) onto the upper area of torque shaft (1-30) on top of thrust bearing (2-70).
  • Page 19 Service Instructions Section 3: Actuator Reassembly 137462E Rev. 1 June 2024 Pneumatic Cylinder Reassembly NOTE: Review Section 3 steps 3.1.1 through 3.1.6 before proceeding with cylinder reassembly. In Section 3.3 where the step indicates to “lubricate, coat or apply lubricant”, use lubricant as identified in Section 1.7 for lubricating the part being installed.
  • Page 20 Section 3: Actuator Reassembly Service Instructions June 2024 137462E Rev. 1 3.3.9 With the piston head facing away from housing (1-10), install piston assembly (4-50) onto center bar assembly (8-10). 3.3.10 Carefully slide piston assembly (4-50) along center bar assembly (8-10) until the yoke pin engages the slots of yoke (1-20).
  • Page 21 Service Instructions Section 3: Actuator Reassembly 137462E Rev. 1 June 2024 NOTE: Rotate the M3 jackscrew into the adapter until the inboard end of the jackscrew is up against the adapter. 3.3.14.5 Install M3 jackscrew adapter (4-55) with M3 jackscrew (4-30) into end cap (4-20).
  • Page 22 Section 3: Actuator Reassembly Service Instructions June 2024 137462E Rev. 1 WARNING Do not allow end cap (4-20) to rotate during center bar tightening. The end cap must maintain the position as described in step 3.3.16. M3 jackscrew must be installed to be in alignment with the target located on the piston assembly (4-50).
  • Page 23 Service Instructions Section 4: Actuator Testing 137462E Rev. 1 June 2024 Section 4: Actuator Testing Actuator Testing 4.1.1 Leak Test - General: A small amount of leakage may be tolerated. Generally, a small bubble which breaks about three seconds after starting to form is considered acceptable.
  • Page 24 PED by pressuring both sides of the piston to avoid damage and over torquing of the actuator components. If further future testing in the field is necessary, Emerson should be contacted for guidance. 4.1.11 After the actuator is installed back on the valve, all accessories should be hooked up and tested for proper operation, and replaced, if found defective.
  • Page 25 Service Instructions Section 5: Field Conversions 137462E Rev. 1 June 2024 Section 5: Field Conversions High Temperature Service (-10 TRIM) 5.1.1 Disassemble and reassemble actuator per section, Section 1 through Section 4, using new -10 (high temperature) Service Kit. Low Temperature Service (-11 TRIM) 5.2.1 Disassemble and reassemble actuator per section, Section 1 through Section 4, using new -11 (low temperature) Service Kit.
  • Page 26 Service Instructions Section 5: Field Conversions June 2024 137462E Rev. 1 NOTE: Push the washer down the ES or stop screw until it is next to the housing adapter (6-10). 5.3.2.4 Install hex nut (6-40) onto ES (6-30). NOTE: Rotate the hex nut down the ES until it is next to housing adapter (6-10). Add an Extended Stop (ES) to Cylinder End Cap (4-20) NOTE:...
  • Page 27 Service Instructions Section 5: Field Conversions 137462E Rev. 1 June 2024 Add an M3 Jackscrew to Housing Adapter (6-10) NOTE: This section can also be used to add an M3 to the cylinder end cap (4-20) at the same time as the M3 is added to the housing adapter (6-10). When an M3 is only being installed into housing adapter (6-10), skip step 3.3.14 during installation.
  • Page 28 Service Instructions Section 5: Field Conversions June 2024 137462E Rev. 1 Add an M3 Jackscrew to Cylinder Outer End Cap (4-20) 5.6.1 Prior to disassembly, review all of Section 1. 5.6.2 Disassemble the actuator per Section 2.1, Section 2.2, steps 2.2.2 through 2.2.5.
  • Page 29 In the unlikely event of a fault developing, the following Fault Location Table is provided to assist the service engineer to perform troubleshooting. This table is designed to cover as wide a range of Emerson's Bettis actuators as possible. Reference to equipment not supplied should be ignored.
  • Page 30 Section 6: Troubleshooting Service Instructions June 2024 137462E Rev. 1 Operational Test 6.2.1 Full Stroke Test The “Full Stroke Test” (“On-line”) must be performed to satisfy the PFD (average probability of failure on demand) value. The full stroke test frequencies will be defined by the final installer to achieve the defined SIL level.
  • Page 31 The below basic procedure should not supersede or replace any customer’s plant safety or work procedures. If a conflict arises between this procedure and the customer’s procedures, the differencesshould be resolved in writing between a customer’s authorized representative and an authorized Emerson Actuation Technologies representative. CAUTION Make sure the actuator is isolated before removing from valve.
  • Page 32 C. Rico Added Warning for Electrostatic April 2022 Charge and Updated the Logo Added ATEX Safety Instructions June 2024 SY1214 for Use in (Potential) Sanket Yewale Explosive Atmosphere Note: * Signatures on file at Emerson Actuation Technologies, Houston Texas Document Revision...
  • Page 33 Appendix Service Instructions 137462E Rev. 1 June 2024 Appendix A: List of Tables Table 1. CBA300 Model Numbers ..................1 Table 2. Actuator Weight ......................4 Table 3. Fault Location Table .................... 25 Table 4. Revision Overview ....................28 Table D-1. Ambient and ATEX Temperatures ..............35 Appendix...
  • Page 34 Appendix Service Instructions June 2024 137462E Rev. 1 Appendix B: List of Figures Figure 1. Bushing Installation .................... 15 Figure 2. M3 Targets ......................23 Appendix...
  • Page 35 Service Instructions Appendix 137462E Rev. 1 June 2024 Appendix C: List of Drawings Part Number 129742, CBA300 Assembly Drawing Appendix...
  • Page 36 Appendix Service Instructions June 2024 137462E Rev. 1 Part Number 129744, CBA300-M3HW Assembly Drawing Appendix...
  • Page 37 Service Instructions Appendix 137462E Rev. 1 June 2024 Appendix D: Safety Instructions for Use in (Potential) Explosive Atmosphere Intended Use The actuator series have been designed to comply with the explosion safety requirements in the Ex-standards EN IEC 60079-0:2018, EN ISO 80079-36, EN ISO 80079-37:2016 and EN 1127-1:2019.
  • Page 38 June 2024 137462E Rev. 1 Safety Instructions Before the installation, please carefully read the service instructions. Emerson is not responsible for damages caused by operations not complying with the instructions contained in such manuals. All the operations shall be done by a trained and qualified operator. All maintenance operations must be performed in accordance with the instructions detailed in the maintenance manual.
  • Page 39 EPL and range of temperature. It is forbidden to use this equipment in a different way if it is not included in the instruction manual. Emerson is not responsible for damages caused by an improper and/or dangerous use. Maximum Temperatures WARNING The actuator’s surface temperature is dependent upon process operating...
  • Page 40 VCIOM-13238-EN (PC-15380) © 2002, 2024 Emerson. All rights reserved. The Emerson logo is a trademark and service mark of Emerson Electric Co. Bettis™ is a mark of one of the Emerson family of companies. All other marks are property of their respective owners.