Emerson Bettis CBB Series Installation instructions

Service Instructions
VA001-196-30 Rev. 1
October 2015
CBB Double-Acting Series Pneumatic Actuators
Disassembly and Reassembly

Service Instructions
VA001-196-30 Rev. 1
Table of Contents
October 2015
ITable of Contents
Table of Contents
Section 1: Introduction
1.1 General Service Information.......................................................................... 1
1.2 Denitions .................................................................................................... 2
1.3 General Safety Information ........................................................................... 2
1.4 Bettis Actuator Reference Materials............................................................... 3
1.5 Service Support Items................................................................................... 3
1.6 Lubrication Requirements ............................................................................. 3
1.7 General Tool Information .............................................................................. 3
1.8 Actuator Weight ........................................................................................... 3
1.9 Actuator Storage........................................................................................... 4
1.10 Actuator Installation ..................................................................................... 4
1.11 Actuator Start-up .......................................................................................... 4
1.12 Actuator Operation....................................................................................... 5
Section 2: Actuator Disassembly
2.1 General Disassembly ..................................................................................... 6
2.2 Pneumatic Cylinder Disassembly ................................................................... 6
2.3 Housing Disassembly .................................................................................... 8
Section 3: Actuator Reassembly
3.1 General Reassembly .................................................................................... 10
3.2 Actuator Reassembly per CBB Models Listed in Step 3.1.5.1 ........................ 10
3.3 Actuator Reassembly per CBB Models Listed in Step 3.1.5.2 ........................ 14
Section 4: Actuator Testing
4.1 Actuator Testing ......................................................................................... 20
Section 5: Troubleshooting
5.1 Fault Insertion ............................................................................................. 22
5.2 Operational Test.......................................................................................... 23
Section 6: Removal and Decommissioning
6.1 Removal and Decommissioning .................................................................. 24
Section 7: Document Revision ���������������������������������������������25
Appendix A: List of Tables ���������������������������������������������������26
Appendix B: List of Drawings ����������������������������������������������27

October 2015
Service Instructions
VA001-196-30 Rev. 1
1
Section 1: Introduction
Introduction
Section 1: Introduction
1�1 General Service Information
1�1�1 This service procedure is offered as a guide to enable general maintenance to be
performed on Bettis CBB double-acting series actuators. The following is a list of
general CBB model numbers.
Table 1� CBB Model Numbers
MODEL (1) MODEL (2) MODEL (3)
315 315-M3 315-M3HW
420 420-M3 420-M3HW
520 520-M3 520-M3HW
525 525-M3 525-M3HW
725 725-M3 725-M3HW
 (1)Alsoincludesactuatormodelswith–10and–11asasufx
NOTE:
Whentheactuatormodelnumberhas“-S”asasufxthentheactuatorisspecialandmay
have some differences that may not be included in this procedure.
1�1�2 Normalrecommendedserviceintervalforthisactuatorseriesisveyears.
NOTE:
Storage time is counted as part of the service interval.
1�1�3 This procedure is applicable with the understanding that all electrical power and
pneumatic pressure has been removed from the actuator.
1�1�4 Remove all piping and mounted accessories that will interfere with the module(s)
that are to be worked on.
1�1�5 This procedure should only be implemented by a technically competent technician
who should take care to observe good workmanship practices.
1�1�6 Numbers in parentheses, ( ) indicate the bubble number (reference number) used
on the Bettis assembly drawing and actuator parts list.
1�1�7 When removing seals from seal grooves, use a commercial seal removing tool or a
small screwdriver with sharp corners rounded off.
1�1�8 Use a non-hardening thread sealant on all pipe threads.
CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS
Apply the thread sealant per the manufacturer’s instructions.
1�1�9 Emerson recommends that disassembly of the actuator should be done in a clean
area on a workbench.

October 2015
Service Instructions
VA001-196-30 Rev. 1
2
Section 1: Introduction
Introduction
1�2 Definitions
WARNING:
If not observed, user incurs a high risk of severe damage to actuator and/or fatal injury
to personnel.
CAUTION:
If not observed, user may incur damage to actuator and/or injury to personnel.
NOTE:
Advisory and information comments provided to assist maintenance personnel to carry out
maintenance procedures.
NOTE:
Thisproductisonlyintendedforuseinlarge-scalexedinstallationsexcludedfromthe
scope of Directive 2011/65/EU on the restriction of the use of certain hazardous substances
in electrical and electronic equipment (RoHS 2).
ES: Extendedstopscrew(fortravelstopadjustmentoverafull100°degreetravelrange).
ES is not intended for use as a manual override.
M3: Manual jackscrew override
1�3 General Safety Information
1�3�1 Products supplied by Emerson, in its “as shipped” condition, are intrinsically safe
if the instructions contained within this service instruction are strictly adhered to
andexecutedbywelltrained,equipped,preparedandcompetentpersonnel.
WARNING: FOLLOW WARNING AND CAUTION SIGNS
For the protection of personnel working on Bettis actuators, this procedure should be
reviewed and implemented for safe disassembly and reassembly. Close attention should be
noted to the WARNINGS, CAUTIONS and NOTES contained in this procedure.
WARNING: FOLLOW COMPANY SAFETY PROCEDURES
This procedure should not supersede or replace any customer’s plant safety or work
procedures.Ifaconictarisesbetweenthisprocedureandthecustomer’sproceduresthe
differences should be resolved in writing between an authorized customer's representative
and an authorized Emerson/Bettis representative.

October 2015
Service Instructions
VA001-196-30 Rev. 1
3
Section 1: Introduction
Introduction
1�4 Bettis Actuator Reference Materials
1�4�1 CBBXXX Assembly Drawing use part number VA001-005-72-4.
1�4�2 CBBXXX-M3HW Assembly Drawing use part number VA001-005-73-3.
1�5 Service Support Items
1�5�1 Bettis service kit
1�5�2 Commercial leak testing solution
1�5�3 Non-hardening thread sealant
1�6 Lubrication Requirements
1�6�1 The actuator should be relubricated at the beginning of each service interval using
the following recommended lubricants.
NOTE:
Lubricants other than those listed in steps 1.6.2 should not be used without prior written
approval of Emerson product engineering. The lubricant item number on some assembly
drawings is item (5) while the Bettis service kits lubricant item number is item number (500).
1�6�2 Alltemperatureservices(-50°Fto+350°F)/(-45.5°Cto176.6°C)useBettisESL-5
lubricant. ESL-5 lubricant is contained in the Bettis Module Service Kit in tubes and
the tubes are marked ESL-4, 5 and 10 lubricant.
1�7 General Tool Information
1�7�1 AllthreadsonCBBSeriesactuatorsareInchUniedandNPT.
1�7�2 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,atle,drive
ratchet / deep well socket set and torque wrench (up to 2,000 lbf-in / 226 N-m).
1�8 Actuator Weight
Table 2� Actuator Weight
Actuator
Model Approximate weight (1) Actuator Model Approximate weight (1)
CBB LB KG CBB LB KG
315 20 9.1 520-M3HW 38 17.2
315-M3 23.2 10.5 525 44 20
315-M3HW 25 11.3 525-M3 50 22.7
420 22 10 525-M3HW 56 25.4
420-M3 29.4 13.4 725 68 31
420-M3HW 33 15 725-M3 75 34
520 28 12.7 725-M3HW 81 37
520-M3 34.4 15.7
(1) Weight is for bare actuator without accessories or valve adaptation.

October 2015
Service Instructions
VA001-196-30 Rev. 1
4
Section 1: Introduction
Introduction
1�9 Actuator Storage
For applications where the actuator is not put into immediate service, it's recommended
that the actuator be cycled with regulated clean/dry pneumatic pressure at least once per
month. Indoor storage, if available, is recommended for all actuators. Care should be taken
to plug all open ports on actuator and controls to keep out foreign particles and moisture.
Also, actuators should not be stored in an atmosphere harmful to resilient seals. For
extendedstorage,contactthemanufacturer'srepresentative.
1�10 Actuator Installation
1�10�1 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.
1�10�2 Actuators are shipped from the factory with the travel stops adjusted for
approximatelyninetydegreerotation.Generallyitisnecessarytomakeslight
travel stop adjustments once the actuator is installed on the valve. Refer to the
valvemanufacturer'srecommendationsforspecicrequirements.Whenthevalve
has internal stops, the actuator should be adjusted at the same points.
NOTE:
The actual "stopping" should be done by the actuator. If the valve does not have internal
stops, adjust the actuator to the full open position. Using this as a reference point, rotate
thevalveclosedandadjusttothevalvemanufacturer'sspecicationsfortotalrotation.
1�10�3 Good instrument practices are also recommended. Clean/dry regulated
pneumatic pressure is essential for long service life and satisfactory operation.
It should be noted that new pneumatic lines often have scale and other debris in
them and these lines should be purged of all foreign material.
NOTE:
Scale and debris can damage control valves, solenoids, seals, etc.
1�11 Actuator Start-up
1�11�1 Prestart-up checks
1. Unithasbeenmountedonvalveproperly.Gearangemountingbolts,
stem key, setscrew(s) installed and secured.
2. No tubing damaged or accessories dislodged during shipping or
installation.
3. Indicatedpositionconrmsvalveposition.
4. All switching valves in normal operating position as per Schematic/
Instructions.

October 2015
Service Instructions
VA001-196-30 Rev. 1
5
Section 1: Introduction
Introduction
1�11�2 Check Connections:
1. Pneumatic/hydraulic components connected as per schematic enclosed
or in service manual supplied.
2. Pneumaticsupplyconnectedtoidentiedports.
3. Electrical connections terminals are secure.
4. Wiring as per enclosed diagram or service manual supplied.
1�11�3 Whenactuatorisrstput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,exercisingtheseals,resultinginaservicereadycondition.
1�11�4 The actuator speed of operation is determined by a number of factors including:
1. Power supply line length
2. Power supply line size
3. Power supply line pressure
4. Controlvalveandttingoricesize
5. Torque requirements of the valve
6. Size of the actuator
7. Setting of speed controls
1�11�5 Duetotheinteractionofthesevariablesitisdifculttospecifya"normal"
operating time. Faster operating times may be obtained by using one or more of
the following:
1. Larger supply lines
2. Larger control valve
3. Higher supply pressure*
4. Quickexhaustvalves
 *Nottoexceedmaximumoperatingpressureofactuatororcontrolcomponents
1�11�6 Sloweroperatingtimesmaybeobtainedbyusingowcontrolvalvestometerthe
exhaust.Excessiveexhaustowmeteringmaycauseerraticoperation.Normally,
incoming supply should not be metered.
1�12 Actuator Operation
1�12�1 Controlled Operation: Controlled operation is accomplished by pressurizing and/or
depressurizing the appropriate cylinder inlet(s) of a double-acting.
Do not exceed pressures indicated on actuator nameplate�
1�12�2 Manual Operation: All pressure must be vented or equalized on both sides of the
pneumatic piston prior to manual operation.

October 2015
Service Instructions
VA001-196-30 Rev. 1
6
Section 2: Actuator Disassembly
Actuator Disassembly
Section 2: Actuator Disassembly
2�1 General Disassembly
WARNING: DANGEROUS GAS AND/OR LIQUIDS
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.
CAUTION: DO NOT EXCEED OPERATING PRESSURE
Pressureappliedtotheactuatorisnottoexceedthemaximumoperatingpressurerating
listed on the actuator name tag.
NOTE:
Before starting the general disassembly of the actuator it is a good practice to operate
actuator with the pressure used by the customer to operate the actuator during normal
operation. Notate and record any abnormal symptoms such as jerky or erratic operation.
2�1�1 Remove all operating pressure from actuator.
2�1�2 Record the settings of stop screw or M3 jackscrews (1-70) and (4-30) before stop
screws are loosened or removed.
NOTE:
InplaceofstopscrewstheactuatormaybeequippedwithoneortwoES(ES=Extended
Stops) or M3/M3HW (1-70) located on outboard end of housing (1-10) and M3/M3HW (4-
30) on the end cap (4-20).
2�2 Pneumatic Cylinder Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.2 before proceeding with cylinder disassembly.
2�2�1 Removehexnut(4-40)asfollows:CBB315throughCBB725standardendcapstop
screworextendedstop(ES)usestep2.2.1.1.CBB315throughCBB725with-M3or
-M3HW use step 2.2.1.2.
2�2�1�1 For CBB315 through 725:endcapstopscreworextendedstopscrew(ES)
2�2�1�1�1 Loosenandremovehexnut(4-40)andwasher(4-90)from
stop screw (4-30) located in end cap (4-20).
2�2�1�1�2 Remove stop screw (4-30) from the end cap (4-20).

October 2015
Service Instructions
VA001-196-30 Rev. 1
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Section 2: Actuator Disassembly
Actuator Disassembly
2�2�1�2 For CBB315/420/520/525/725-M3 or M3HW:
2�2�1�2�1 Remove retainer ring (12-30) and groove pin (12-20) from
optionalhexdrivehuborfromhandwheel(12-10).
2�2�1�2�2 Removeoptionalhexdrivehuborhandwheel(12-10)fromM3
jackscrew (1-70).
2�2�1�2�3 Loosenandremovehexnut(4-40)fromM3jackscrew(1-70).
NOTE:
CBB315/420/520/525/725-M3 or M3HW models the M3 jackscrew (1-70) cannot be
removed now. The M3 used in these models can be removed later in this procedure using
step 2.2.8.
ES (4-30), stop screw (4-30) or CBB315-M3 (1-70) does not require removal from end cap
(4-20) unless replacing with a new ES, stop screw or M3.
2�2�2 Removehousingsidehexnut(8-20)fromcenterbar(8-10).
2�2�3 Remove outer end cap (4-20) with center bar (8-10) from outboard end of
cylinder (4-10).
2�2�4 While holding housing torque shaft (1-30) pull cylinder (4-10) away from
housing (1-10).
2�2�5 Slide cylinder (4-10) over piston seal (5-40) and remove.
2�2�6 Remove piston (4-50) from housing (1-10).
NOTE:
Piston (4-50) is an assembly made up of one roll pin and one yoke pin; do not attempt to
disassemble the piston assembly.
2�2�7 OnactuatormodelsCBB415/520/725removecylinderadapter(4-15)fromange
of housing (1-10).
2�2�8 M3 Jackscrew Removal From End Cap (4-20).
2�2�8�1 CBB315/415 with a M3 remove M3 jackscrew (4-30) from the backside of
end cap (4-20).
2�2�8�2 CBB420/520/525/725 with a M3 jackscrew remove per following steps.
2�2�8�2�1 Remove retainer ring (5-60) from M3 adapter (4-55).
2�2�8�2�2 Remove M3 adapter (4-55) from end cap (4-20).
NOTE:
The M3 adapter will be removed from backside of end cap (4-20) with the M3 jackscrew.
ES (4-30), stop screw (4-30) or CBB315-M3 jackscrew (1-70) does not require removal from
end cap (4-20) unless replacing with a new ES, stop screw or M3.