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Summary of Contents for Emerson BETTIS CBB Spring-Return Series
- Page 1 Service Instructions VA001-196-31 Rev. 5 June 2024 Bettis CBB Spring-Return Series Pneumatic Actuators Disassembly and Reassembly...
- Page 2 Notes Service Instructions June 2024 VA001-196-31 Rev. 5 This page is intentionally left blank.
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Page 3: Table Of Contents
Service Instructions Table of Contents VA001-196-31 Rev. 5 June 2024 Table of Contents Section 1: Introduction General Service Information ................1 Definitions ........................2 General Safety Information ..................2 Bettis Reference Materials ..................3 Service Support Items ...................3 Operating Media .....................3 Lubrication Requirements ..................3 Actuator Weight ......................4 Actuator Storage .....................4 1.10... - Page 4 Table of Contents Service Instructions June 2024 VA001-196-31 Rev. 5 Section 6: Removal and Decommissioning Removal and Decommissioning .................. 21 Appendix A: List of Tables List of Tables ........................22 Appendix B: List of Drawings Part Number VA152230-D, CBBXXX Assembly Drawing......23 Part Number VA152608-F CBBXXX-SRX-M3 Assembly Drawing ....
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Page 5: Section 1: Introduction
Service Instructions Section 1: Introduction VA001-196-31 Rev. 5 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 CBB-SR Spring-Return Series Actuators. The following table is a list of general CBB-SR models numbers. Table 1. -
Page 6: Definitions
Section 1: Introduction Service Instructions June 2024 VA001-196-31 Rev. 5 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: Bettis Reference Materials
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 1.7.1... -
Page 8: Actuator Weight
Section 1: Introduction Service Instructions June 2024 VA001-196-31 Rev. 5 General Tool Information • All threads on CBB-Series actuators are inch unified and NPT. • All tools/hexagons are American Standard inch. Two adjustable wrenches, Allen wrench set, small standard screwdriver with sharp edges rounded off, medium-size standard screwdriver, diagonal cutting pliers, external snap ring pliers, flat file, drive ratchet/deepwell socket set and torque wrench (up to 2,000 in-lb / 226 Nm). -
Page 9: Actuator Installation
Service Instructions Section 1: Introduction VA001-196-31 Rev. 5 June 2024 1.11 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 guess work out of installation. -
Page 10: Actuator Operation
Section 1: Introduction Service Instructions June 2024 VA001-196-31 Rev. 5 NOTE: When the 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: Section 2: Actuator Disassembly
Service Instructions Section 2: Actuator Disassembly VA001-196-31 Rev. 5 June 2024 Section 2: Actuator Disassembly General Disassembly WARNING It is possible that the actuator may contain a 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: Spring Cylinder Disassembly
Section 2: Actuator Disassembly Service Instructions June 2024 VA001-196-31 Rev. 5 Spring Cylinder Disassembly NOTE: Review Section 2 steps 2.1.1 through 2.1.2 before proceeding with cylinder disassembly. The spring in CBB-Series spring-return actuators is preloaded. Actuator must be disassembled in the following manner: 2.2.1 Remove hex nut (1-80) as follows: For CBB315 through 725 standard housing stop screw or extended stop (ES), use step 2.2.1.1. - Page 13 Service Instructions Section 2: Actuator Disassembly VA001-196-31 Rev. 5 June 2024 2.2.3 Remove breather (30) from end cap (4-20). 2.2.4 For models with breather -10 cold temperature, do the following: 2.2.4.1 Remove breather (30-10), elbow (30-30) and hex nipple (30-20) from end cap (4-20).
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Page 14: Housing Disassembly
Section 2: Actuator Disassembly Service Instructions June 2024 VA001-196-31 Rev. 5 Housing Disassembly 2.3.1 Remove center bar assembly (8-10) from housing (1-10). 2.3.2 Remove both retaining rings (1-60) from torque shaft (1-30). Remove washers (1-65) from housing. 2.3.3 The following steps may be required before disassembly can continue. 2.3.3.1 If torque shaft (1-30) has any raised burrs or sharp edges they should be removed. -
Page 15: Section 3: Actuator Reassembly
Service Instructions Section 3: Actuator Reassembly VA001-196-31 Rev. 5 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 VA001-196-31 Rev. 5 3.2.1 M3 jackscrew installation for CBB315/415-SR-M3. 3.2.1.1 Apply a light coating of lubricant to the threads of M3 jackscrew (1-70). NOTE: M3 jackscrew (1-70) will be installed from inside of the housing (1-10). 3.2.1.2 Insert and rotate M3 jackscrew (1-70) into housing (1-10).
- Page 17 Service Instructions Section 3: Actuator Reassembly VA001-196-31 Rev. 5 June 2024 NOTE: Rotate the hex nut down the M3 jackscrew until it is next to the M3 adapter. 3.2.3 Apply a coating of lubricant to the torque shaft holes located on each side of housing (1-10).
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Page 18: Spring Cylinder Reassembly
Section 3: Actuator Reassembly Service Instructions June 2024 VA001-196-31 Rev. 5 3.2.9 Rotate the torque shaft (1-30) so that the arms of yoke (1-20) point outward. 3.2.10 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove located in the center bar hole of housing (1-10). 3.2.11 Coat entire length of center bar (8-10) with lubricant including the threads. - Page 19 Service Instructions Section 3: Actuator Reassembly VA001-196-31 Rev. 5 June 2024 3.3.7 Apply a coating of lubricant to entire bore of spring cylinder (4-10). 3.3.8 Spring cylinder installation 3.3.8.1 For CBB415-SR, CBB520-SR and CBB725-SR models, install the lubricated spring cylinder (4-10) over the piston and up against the O-ring seal on the stepped diameter flange of cylinder adapter (4-15).
- Page 20 Section 3: Actuator Reassembly Service Instructions June 2024 VA001-196-31 Rev. 5 3.3.18 Continue to rotate center bar assembly (8-10) clockwise until spring (4-70) is fully compressed, spring cylinder is seated against the flange of housing (1-10) or adapter (4-15) and end cap (4-20) is properly seated in spring cylinder (4-10).
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Page 21: Section 4: Actuator Testing
Service Instructions Section 4: Actuator Testing VA001-196-31 Rev. 5 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 22: Return To Service
The actuators main pressure bearing parts will be tested in controlled conditions 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. -
Page 23: Section 5: Troubleshooting
In the unlikely event of a fault developing, the following Symptoms and Solutions Table is provided to assist the service engineer. This table is designed to cover as wide a range of Emerson's Bettis Actuators as possible. Reference to equipment that is not supplied should be ignored. -
Page 24: Operational Test
Section 5: Troubleshooting Service Instructions June 2024 VA001-196-31 Rev. 5 Operational Test 5.2.1 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 25: Section 6: Removal And Decommissioning
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 differences should be resolved in writing between a customer's authorized representative and an authorized Emerson Actuation Technologies representative. CAUTION Make sure actuator is isolated before removing from the valve. -
Page 26: List Of Tables
Appendix Service Instructions June 2024 VA001-196-31 Rev. 5 Appendix A: List of Tables Table 1. CBB-SR Model Numbers ..................1 Table 2. Actuator Weight ......................4 Table 3. Tightening Torque Center Bar ................. 16 Table 4. Pressure Requirement and Limitations ............18 Table 5. -
Page 27: Appendix B: List Of Drawings
Service Instructions Appendix VA001-196-31 Rev. 5 June 2024 Appendix B: List of Drawings Part Number VA152230-D, CBBXXX Assembly Drawing Appendix... -
Page 28: Part Number Va152608-F Cbbxxx-Srx-M3 Assembly Drawing
Appendix Service Instructions June 2024 VA001-196-31 Rev. 5 Part Number VA152608-F CBBXXX-SRX-M3 Assembly Drawing Appendix... -
Page 29: Appendix C: Safety Instructions For Use In (Potential) Explosive Atmosphere
Service Instructions Appendix VA001-196-31 Rev. 5 June 2024 Appendix C: 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 30: Safety Instructions
VA001-196-31 Rev. 5 Safety Instructions Before the installation, please carefully read the service instructions. Emerson is not responsible for damages caused by operations not complying with the instruction manuals. All the operations shall be done by a trained and qualified operator. -
Page 31: Maximum Temperatures
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... - Page 32 VCIOM-13252-EN (PC-15313) © 2022, 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.
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