6.2 Operational Test .......................................................................................... 26
7.1 Removal and Decommissioning .................................................................. 27
II
Table of Contents
Service Instructions
137462E Rev. D
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™ CBA-300 double-acting series actuators.
The following is a list of general CBA-300 model numbers:
(1) Also includes actuator models with –10 and –11 as a sufx
Section 1: Introduction
August 2015
NOTE:
When the actuator model number has “-S” as a sufx 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 This procedure is written using the serial number tag side of the housing (1-10)
as a reference and this side will be considered the front side of the actuator. The
position indicator (1-50) area of housing (1-10) will be the top of the actuator.
1.1.8 When removing seals from seal grooves, use a commercial seal removing tool or a
small screwdriver with sharp corners rounded off.
1.1.9 Use a non-hardening thread sealant on all pipe threads.
Introduction
1
Section 1: Introduction
August 2015
CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS
Apply the thread sealant per the manufacturer’s instructions.
1.1.10 Bettis recommends that disassembly of the actuator should be done in a clean
area on a workbench.
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.
Service Instructions
137462E Rev. D
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).
M3:
Jackscrew or jackscrew assembly
ES:
Extended Stop(s)
1�3 General Safety Information
1.3.1 Products supplied by Bettis, 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.
2
Introduction
Service Instructions
137462E Rev. D
WARNING: FOLLOW COMPANY SAFETY PROCEDURES
This procedure should not supersede or replace any customer’s plant safety or work
procedures. If a conict 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 Bettis representative.
1�4 Bettis Reference Materials
1.4.1 CBA-300 assembly drawing use part number 129742.
1.4.2 CBA-300-M3HW assembly drawing use part number 129744.
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.
Section 1: Introduction
August 2015
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 Bettis Product Engineering.
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 CBA series actuators are Inch Unied and NPT.
1.7.2 All tools/Hexagons are American Standard inch.
1.7.3 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 3,000 inch pounds / 339 N-m).
Introduction
3
Section 1: Introduction
August 2015
1�8 Actuator Weight
Table 2� Actuator Weight
Service Instructions
137462E Rev. D
Actuator
Model
CBA73013059CBA93015570.4
CBA730-M313159.4CBA930-M315871.7
CBA730-
M3HW
CBA83014063.5CBA103017077.1
CBA830-M314364.9CBA1030-M317378.5
CBA830-
M3HW
(2) Weight is for bare actuator without accessories or valve adaptation.
Approximate Weight (2)
LBKGLBKG
131.559.6
143.565.1
1�9 Actuator Storage
For applications where the actuator is not placed into immediate service, it is
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. Actuators should not be stored in an atmosphere that is harmful to
resilient seals. Contact factory for extended storage period.
1�10 Actuator Installation
Actuator
Model
CBA930-
M3HW
CBA1030-
M3HW
Approximate Weight (2)
158.571.9
173.578.7
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 the guess work out of the installation.
1.10.2 Actuators that 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 onto the valve. Refer to the
valve manufacturer's recommendations for specic 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 specications for total rotation.
4
Introduction
Service Instructions
137462E Rev. D
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 and seals.
1�11 Actuator Start-up
1.11.1 Prestart-up checks
1. Inspect to ensure the unit has been mounted onto valve properly. Gear
ange mounting bolts, stem key, set screw(s) are installed and secured.
2. No tubing damaged or accessories dislodged during the shipping or
the installation.
3. Indicated position conrms valve position.
4. All switching valves in normal operating position as per
SCHEMATIC / INSTRUCTIONS.
1.11.2 Check connections
1. Pneumatic / hydraulic components connected as per schematic enclosed or
in service manual supplied.
2. Pneumatic supply connected to the identied ports.
3. Electrical connection terminals are secured.
4. Wiring as per enclosed diagram or service manual supplied.
1.11.3 When actuator is rst 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.
1.11.4 The actuator speed of operation is determined by a number of factors includes:
1. Power supply line length
2. Power supply line size
3. Power supply line pressure
4. Control valve and tting orice size
5. Torque requirements of the valve
6. Size of the actuator
7. Setting of speed controls
8. Hydraulic Manual Override (where available)
Section 1: Introduction
August 2015
Introduction
5
Section 1: Introduction
August 2015
1.11.5 Due to the interaction of these variables, it is difcult to specify a "normal"
operating time. Faster operating time 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 time may be obtained by using ow control valves to meter the
exhaust. Excessive exhaust ow metering may cause erratic operation.
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.
Service Instructions
137462E Rev. D
6
Introduction
Service Instructions
137462E Rev. D
Section 2: 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.
August 2015
NOTE:
Before starting the general disassembly of the actuator, it is a good practice to operate
actuator with the pressure used by the customer during normal operation. Notate and
record any abnormal symptoms such as jerky or erratic operation.
2.1.1 Remove all operating pressure from actuator.
NOTE:
In place of stop screws, the actuator may be equipped with one or two ES (ES = Extended
Stops) or M3/M3HW located on outboard end of housing (1-10) and end cap (4-20).
2.1.2 Record the settings of stop screw, ES or M3 jackscrews (6-30) and (4-30) before
they are loosened or removed.
2.1.3 To help in correct reassembly, all mating parts should be marked or tagged for
ease of reassembly, i.e. cylinder to cylinder adapter, cylinder adapter to housing,
housing to torque shaft and housing to housing adapter, etc.
Actuator Disassembly
7
Section 2: Actuator Disassembly
August 2015
2�2 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.
2.2.1.1 CBA730 through CBA1030 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).
2.2.1.2 CBA730 through CBA1030-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 (4-30).
2.2.1.2.3 Remove caution tag (12-40) from M3 jackscrew (4-30).
2.2.1.2.4 Loosen and remove hex nut (4-40) from M3 jackscrew (4-30).
Service Instructions
137462E Rev. D
NOTE:
For CBA730 through CBA1030-M3 or M3HW models, the M3 jackscrew (4-30)
cannot be removed now. The M3 used in these models can be removed later in this
procedure using step 2.2.7.
2.2.2 Remove housing side hex nut (8-20) from center bar (8-10).
2.2.3 Remove outer end cap (4-20) from outboard end of cylinder (4-10).
NOTE:
ES (4-30) or stop screw (4-30) does not require removal from end cap (4-20) unless
replacing with a new ES or stop screw.
2.2.4 Slide cylinder (4-10) over piston (4-50) and remove.
2.2.5 Remove piston (4-50) from center bar (8-10).
NOTE:
The standard non-M3 piston (4-50) is an assembly made up of one roll pin and one yoke
pin; do not attempt to disassemble the piston assembly. The M3 piston (4-50) has two
targets and four drive screws in addition to the roll pin and yoke pin.
8
Actuator Disassembly
Service Instructions
137462E Rev. D
2.2.6 On actuator models CBA830, CBA930 and CBA1030, remove cylinder adapter (4-15)
from ange 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).
2.2.7.2 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 (4-30).
2�3 Housing Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 before proceeding with housing disassembly.
Section 2: Actuator Disassembly
August 2015
2.3.1 Remove hex nut (6-40) as follows: CBA730 through CBA1030 standard housing
adapter stop screw or extended stop (ES) use step 2.3.1.1. CBA730-M3/M3HW
through CBA1030-M3/M3HW use step 2.3.1.2.
2.3.1.1 CBA730 through CBA1030 housing adapter stop screw or extended stop
screw (ES)
2.3.1.1.1 Loosen and remove hex nut (6-40) and washer (6-90) from stop
screw (6-30) located in housing adapter (6-10).
2.3.1.1.2 Remove stop screw (6-30) from housing adapter (6-10).
NOTE:
ES (6-30) or stop screw (6-30) does not require removal from the housing adapter
(6-10) unless replacing with a new ES or stop screw.
2.3.1.2 CBA730 through CBA1030-M3 or M3HW
2.3.1.2.1 Remove retainer ring (12-30) and groove pin (12-20) from
optional hex drive hub or from hand wheel (12-10).
2.3.1.2.2 Remove optional hex drive hub or hand wheel (12-10) from M3
jackscrew (6-30).
2.3.1.2.3 Remove caution tag (12-40) from M3 jackscrew (6-30).
2.3.1.2.4 Loosen and remove hex nut (6-40) from M3 jackscrew (6-30).
Actuator Disassembly
9
Section 2: Actuator Disassembly
August 2015
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
procedure using step 2.3.10.
2.3.2 Remove center bar (8-10) from housing adapter (6-10).
2.3.3 Remove housing adapter (6-10) from housing (1-10).
2.3.4 Remove the position indicator (1-50) from torque shaft (1-30).
2.3.5 Remove retaining ring (2-90) from torque shaft (1-30).
2.3.6 Remove thrust washer (2-80) and thrust bearing (2-70) from torque shaft (1-30).
2.3.7 Remove the torque shaft (1-30) by pushing it out the bottom of housing (1-10).
2.3.8 Remove yoke key (1-40) from torque shaft (1-30).
2.3.9 Remove yoke (1-20) from housing (1-10).
2.3.10 Actuator equipped with a M3 or M3HW mounted in the housing adapter (6-10)
complete steps 2.3.10.1 and 2.3.10.2.
2.3.10.1 Remove retainer ring (7-60) from M3 adapter (6-55).
2.3.10.2 Remove M3 adapter (6-55) with M3 jackscrew (6-30) from housing adapter
(6-10).
Service Instructions
137462E Rev. D
10
Actuator Disassembly
Service Instructions
137462E Rev. D
Section 3: Actuator Reassembly
Section 3: Actuator Reassembly
3�1 General Reassembly
CAUTION: CHECK SHELF LIFE OF SEALS
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.
3.1.3 All parts should be thoroughly inspected for excessive wear, stress cracking,
galling and pitting. Attention should be directed to threads, sealing surfaces
and areas that will be subjected to sliding or rotating motion. Sealing surfaces of
the cylinder, torque shaft and center bar must be free of deep scratches, pitting,
corrosion and blistering or aking coating.
August 2015
CAUTION: REPLACE WITH NEW PARTS
Actuator parts that reect any of the above listed characteristics may need replacement
with new parts.
3.1.4 INSTALLATION LUBRICATION INSTRUCTIONS: Use the correct lubrication as
dened in Section 1 step 1.6.
3.1.4.1 Before installation, coat all moving parts with lubricant.
3.1.4.2 Coat all seals with lubricant, before installing into seal grooves.
3.1.5 Torque shaft upper bearing and the lower bearing are not recommended as parts
that require eld replacement. Consult Houston, Texas Bettis Service Coordinator
for “torque shaft upper or lower bearing” replacement information.
3.1.6 CBAX30 double-acting actuator construction as follows:
3.1.6.1 STANDARD CONSTRUCTION - Cylinder (4-10) or cylinder adapter (4-
15) and cylinder (4-10) mounted on the left side of housing (1-10) and
housing adapter (6-10) mounted on the right side of housing (1-10).
3.1.6.2 -S INVERSE CONSTRUCTION - Cylinder (4-10) or cylinder adapter (4-15)
and cylinder (4-10) mounted on the right side of housing (1-10) and the
housing adapter (6-10) mounted on the left side of housing (1-10).
Actuator Reassembly
11
Section 3: Actuator Reassembly
August 2015
3�2 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 identied in Section 1 step 1.6 for lubricating the part being installed.
Actuators equipped with a housing adapter M3 jackscrew (6-30) install M3 per 3.2.1.
Actuators equipped with housing adapter ES or stop screw (6-30) skip step 3.2.1 and
continue assembly at step 3.2.2.
3.2.1 M3 jackscrew installation to housing adapter (6-10).
3.2.1.1 Apply a coating of lubricant to outer diameter and inner diameter threads
of M3 jackscrew adapter (6-55).
3.2.1.2 Coat O-ring seal (7-65) with lubricant and install into outer diameter seal
groove located in the M3 jackscrew adapter (6-55).
3.2.1.3 Apply a light coating of lubricant to the threads of M3 jackscrew (6-30).
3.2.1.4 Install and rotate the M3 jackscrew (6-30) into M3 jackscrew adapter (6-55).
Service Instructions
137462E Rev. D
NOTE:
Rotate the M3 jackscrew into the adapter until the inboard end of the
jackscrew is up against the adapter.
3.2.1.5 Install M3 jackscrew adapter (6-55) with M3 jackscrew (6-30) into
housing adapter (6-10).
3.2.1.6 Install retainer ring (7-60) onto groove in M3 jackscrew adapter (6-55).
3.2.1.7 Install O-ring seal (7-30) onto M3 jackscrew (6-30).
NOTE:
Move the O-ring seal (7-30) down the M3 jackscrew until it is next to the
M3 jackscrew adapter.
Rotate the hex nut down the M3 jackscrew until it is next to the M3
jackscrew adapter.
12
3.2.2 Housing Adapter (6-10) ES or stop screw (6-30) installation.
3.2.2.1 Lubricate ES or stop screw (6-30) and install into housing adapter (6-10).
3.2.2.2 Install O-ring seal (7-30) onto ES or stop screw (6-30).
Actuator Reassembly
Service Instructions
137462E Rev. D
Section 3: Actuator Reassembly
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).
3.2.2.4 Install hex nut (6-40) onto ES or stop screw (6-30).
NOTE:
Rotate the hex nut down the ES or stop screw until it is next to the
housing adapter (6-10).
August 2015
3.2.3 Apply a coating of lubricant to the torque shaft holes located on each side of
housing (1-10).
3.2.4 Coat rod wiper seal (2-20) with lubricant and install in the grooves located in the
upper torque shaft “through hole” of housing (1-10).
NOTE:
The cup of wiper seal will be installed facing down into the housing.
3.2.5 Coat u-cup seal (2-40) with lubricant and install into the groove located in the
lower torque shaft “through hole” of housing (1-10) - the inner most groove
nearest the yoke (1-20).
NOTE:
The cup of rod wiper seal will be installed facing into the housing.
3.2.6 Coat rod wiper (2-60) with lubricant and install into the outer most groove located
in the lower torque shaft “through hole” of housing (1-10).
NOTE:
The cup of rod wiper will be installed facing to the outside of housing (1-10).
Actuator Reassembly
3.2.7 Apply a generous amount of lubricant to the slots in the arms of yoke (1-20).
Coat yoke (1-20) with lubricant and install into housing (1-10).
3.2.8 Insert the yoke key (1-40) into the slot in the torque shaft (1-30).
13
Section 3: Actuator Reassembly
August 2015
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).
NOTE:
A new retaining ring (2-90) is provided in the Bettis CBA Service Kit.
3.2.12 Install the new retaining ring (2-90) into the groove located on the upper area of
torque shaft (1-30).
CAUTION: VERIFY RETAINING RING
Verify that retaining ring (2-90) is properly seated in the groove of torque shaft (1-30).
Service Instructions
137462E Rev. D
3.2.13 Install position indicator (1-50) onto the top of torque shaft (1-30).
3.2.14 Rotate the torque shaft (1-30) so that the arms of yoke (1-20) point outward.
3.2.15 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of housing adapter (6-10).
3.2.16 Install hex nut (8-20) onto one end of center bar (8-10).
3.2.17 Coat entire length of center bar assembly (8-10) with lubricant including the threads.
3.2.18 Insert center bar assembly (8-10) into the center hole of housing adapter (6-10).
Slide center bar assembly through housing adapter until center bar assembly nut is
ush against the housing adapter (6-10).
WARNING: DO NOT SCRATCH CENTER BAR ASSEMBLY
Care should be taken during installation of center bar assembly so as to not scratch it or
damage the housing adapter O-ring seal (5-20).
NOTE:
Rotate the hex nut down the M3 jackscrew until it is next to the M3 adapter.
3.2.19 Recoat center bar assembly (8-10) with lubricant.
3.2.20 Coat O-ring seal (7-10) with lubricant and install onto outer diameter ange
located on housing adapter end of housing (1-10).
14
NOTE:
The installation location for O-ring seal (7-10) is dened in step 3.1.6 under
Standard construction and Inverse construction actuators.
3.2.21 Install housing adapter (6-10), with installed center bar assembly (8-10), on to the
cylinder adapter end of housing (1-10).
Actuator Reassembly
Service Instructions
137462E Rev. D
Section 3: Actuator Reassembly
3�3 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 identied in Section 1 step 1.6 for lubricating the part being installed.
3.3.1 Coat one O-ring seal (5-10) with lubricant and install onto outer diameter ange
located on cylinder/cylinder adapter end of housing (1-10).
3.3.2 Actuators equipped with cylinder adapter (4-15), models CBA830-SR, CBA930-SR
and CBA1030-SR (including M3/M3HW models), do steps 3.3.2.1 and 3.3.2.2.
3.3.2.1 Install cylinder adapter (4-15) onto housing ange, with the stepped
outer diameter, of cylinder adapter (4-15), facing away from housing
(1-10).
3.3.2.2 Install one o-seal (5-15) onto stepped diameter of cylinder adapter (4-
15).
3.3.3 Coat all areas of piston (4-50) with lubricant.
3.3.4 Coat rod bushing (5-50) with lubricant and install into the internal rod bushing
groove located in the head of piston (4-50).
3.3.5 Coat rod T-seal (5-25) with lubricant and install in the internal seal groove in the
head of piston (4-50).
3.3.6 Coat piston seal (5-40) with lubricant and install into outer diameter seal groove of
piston (4-50).
3.3.7 Coat piston bearing (5-45) with lubricant and install into outer diameter bearing
groove of piston (4-50).
3.3.8 Install two bushings (4-80) onto piston assembly (4-50) - Refer to following
drawing (Figure 1).
August 2015
Actuator Reassembly
Figure 1 Bushing Installation
15
Section 3: Actuator Reassembly
August 2015
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).
CAUTION: VERIFY BUSHINGS (4-80) ARE INSTALLED
Check to determine that both bushings (4-80) are installed between the arms of yoke
(1-20) and the piston assembly (4-50). Refer to Figure 1.
NOTE:
While holding the center bar assembly ush against the housing adapter (6-10), push
piston assembly (4-50) into housing (1-10) as far as the piston will travel.
3.3.11 Apply a coating of lubricant to entire bore of cylinder (4-10).
3.3.12 Cylinder (4-10) installation:
3.3.12.1 For CBA830, CBA930 and CBA1030 models (including M3/M3HW
models) install the lubricated cylinder (4-10) over the piston and up-
against the O-ring seal on the stepped diameter ange of cylinder
adapter (4-15).
3.3.12.2 For CBA730 models, install the lubricated cylinder (4-10) over the piston
and up against the O-ring seal on the ange of housing (1-10).
3.3.13 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of end cap (4-20).
Service Instructions
137462E Rev. D
NOTE:
Actuators equipped with an end cap M3 jackscrew (4-30) pre-install M3 into end cap (4-20)
per step 3.3.14 and then install pre-assembled end cap into cylinder (4-10) per step 3.3.15.
Actuators equipped with housing adapter ES or stop screw (4-30) skip step 3.3.15 and
continue assembly at step 3.3.17.
3.3.14 M3 jackscrew installation to end cap (4-20).
3.3.14.1 Apply a coating of lubricant to outer diameter and inner diameter threads
of M3 jackscrew adapter (4-55).
3.3.14.2 Coat O-ring seal (5-65) with lubricant and install into outer diameter seal
groove located in the M3 jackscrew adapter (4-55).
3.3.14.3 Apply a light coating of lubricant to the threads of M3 jackscrew (4-30).
3.3.14.4 Install and rotate the M3 jackscrew (4-30) into M3 jackscrew adapter (4-55).
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).
16
Actuator Reassembly
Service Instructions
137462E Rev. D
3.3.15 End cap outer diameter seal installation.
3.3.16 Install end cap (4-20) onto center bar (8-10) and into cylinder (4-10). Position the
Section 3: Actuator Reassembly
August 2015
3.3.14.6 Install retainer ring (5-60) into exposed outer diameter groove in M3
jackscrew adapter (4-55).
3.3.14.7 Install O-ring seal (5-30) onto M3 jackscrew (4-30).
NOTE:
Move the O-ring seal (5-30) down the M3 jackscrew until it is next to the
M3 jackscrew adapter.
Rotate the hex nut down the M3 jackscrew until it is next to the M3
jackscrew adapter.
3.3.15.1 For CBA830, CBA930 and CBA1030 models, install O-ring seal (5-15)
onto the outer diameter of end cap (4-20).
3.3.15.2 For CBA730 models, install O-ring seal (5-10) onto the outer diameter of
end cap (4-20).
end cap (4-20) so that the inlet port is at the bottom and the ES, cylinder stop
screw or M3 jackscrew (4-30) is at the top of the actuator.
WARNING: COMPLETE STEP 3.3.17
If step 3.3.17 is not completed as described, the center bar O-ring seals (5-20) may become
a source of pressure leakage and cause the actuator to fail.
3.3.17 Install the second hex nut (8-20) onto the cylinder end of center bar (8-10).
Adjust the two hex nuts (8-20) such that the approximate same number of threads
is exposed on the ends of the center bar (8-10).
WARNING: DO NOT ALLOW END CAP TO ROTATE
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). If the M3 does not
contact the target during M3 adjustments the groove pin (12-20) is subject to failure.
3.3.18 Torque tighten center bar assembly (8-10) to 233 foot pounds / 316 N-m.
3.3.19 End Cap (4-20) ES or stop screw (4-30) installation.
3.3.19.1 Lubricate ES or stop screw (4-30) and install into end cap (4-20).
3.3.19.2 Install O-ring seal (5-30) onto ES or stop screw (4-30).
Actuator Reassembly
17
Section 3: Actuator Reassembly
August 2015
NOTE:
Move the O-ring seal (5-30) down the ES or stop screw until it is next to
the end cap (4-20).
3.3.19.3 Install washer (4-90) onto ES or stop screw (4-30).
NOTE:
Push the washer down the ES or stop screw until it is next to the end cap
(4-20).
3.3.19.4 Install hex nut (4-40) onto ES or stop screw (4-30).
NOTE:
Rotate the hex nut down the ES or stop screw until it is next to the end cap
(4-20).
Service Instructions
137462E Rev. D
3.3.20 M3 hex drive hub or hand wheel (12-10) installation as follows:
(4-30) and (6-30). Align the "hole" of the drive hub with the "hole" located
in the outboard end of M3 jackscrew (4-30) and (6-30).
3.3.20.2 Install caution tag (12-40) onto M3 jackscrews (4-30) and (6-30).
3.3.20.3 Install retainer ring (12-30) and groove pin (12-20) into the hex drive hub
(12-10) or hand wheel (12-10).
3.3.21 Adjust both M3 jackscrews (4-30) and (6-30) back to setting recorded in Section 2
step 2.1.2 under General Disassembly. Tighten both M3 jackscrew hex nuts (4-40)
and (6- 40) securely, while holding M3 jackscrews in position.
18
Actuator Reassembly
Service Instructions
137462E Rev. D
Section 4: Actuator Testing
4�1 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.
4.1.2 All areas, where leakage to atmosphere may occur, are to be checked using a
commercial leak testing solution.
WARNING: FOLLOW SERIAL TAG INFORMATION
Pressure is not to exceed the maximum operating pressure rating listed on the serial
number tag (20).
4.1.3 All leak testing will use the customer's normal operating pressure or the actuator
name tag normal operating pressure (NOP).
Section 4: Actuator Testing
August 2015
NOTE:
When testing the actuator, use a proper adjusted regulator to apply pressure to the
actuator.
4.1.4 Before testing for leaks, apply and release the pressure listed in step 4.1.3 to both
sides of the piston. Repeat this cycle approximately ve times. This will allow the
new seals to seek their service condition.
4.1.5 Apply the pressure listed in step 4.1.3 to the housing side of the piston and allow
the actuator to stabilize.
4.1.6 Apply a leak testing solution to the following areas:
4.1.6.1 Cylinder to housing joint on CBA730 or cylinder to cylinder adapter to
housing joints on CBA830, CBA930 and CBA1030 actuator models.
4.1.6.2 On the outboard end of housing adapter (6-10) at the center bar hex nut.
Checks the center bar to housing O-ring seal (5-20).
4.1.6.3 Housing adapter stop screw / ES / M3 jackscrew O-ring seal (7-30).
4.1.6.4 Torque shaft (1-30) to housing (1-10) interface. Checks rod wiper seals
(2-20).
4.1.6.5 End cap (4-20) port "hole". Checks the piston to cylinder seal (5-40) and
piston to center bar seal (5-25).
4.1.6.6 Housing adapter (6-10) to housing (1-10) joint. Check O-ring seal (7-10).
4.1.7 Apply the pressure listed in step 4.1.3 to the end cap inlet port and allow the
actuator to stabilize.
Actuator Testing
19
Section 4: Actuator Testing
August 2015
4.1.8 Apply a leak testing solution to the following areas:
4.1.8.1 Cylinder to end cap joint. Checks O-ring seal (5-10) on CBA730 or checks
4.1.8.2 Housing adapter (6-10) inlet port hole. Checks the piston to cylinder seal
4.1.8.3 End cap stop screw or M3 jackscrew O-ring seal.
4.1.8.4 Remove pressure from pressure inlet port in the end cap (4-20).
4.1.9 If an actuator was disassembled and repaired as a result of this procedure, the
above leakage test must be performed again.
4.1.10 Shell Pressure Test - Optional pressure test could be performed on PED certied
actuator by applying pressure to both sides of the piston simultaneously for a
period of two (2) minutes. If any leakage occurs across a static seal, the unit must
be disassembled and the cause of leakage determined and corrected.
WARNING: PED PRESSURE TESTING
The actuators main pressure bearing parts will be tested in controlled conditions in
accordance with the requirement of PED by pressuring both sides of the piston to avoid
damage and over torquing of the actuator components. If further future testing in the eld
is necessary, Emerson should be contacted for guidance.
Service Instructions
137462E Rev. D
O-ring seal (5-15) on CBA830, CBA930 and CBA1030 actuators.
(5-40) and piston to center bar seal (5-25).
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.
20
Actuator Testing
Service Instructions
137462E Rev. D
Section 5: Field Conversions
August 2015
Section 5: Field Conversions
5�1 High Temperature Service (-10 TRIM)
5.1.1 Disassemble and reassemble actuator per Sections 1 through Section 4 using
new -10 (high temperature) Service Kit.
5�2 Low Temperature Service (-11 TRIM)
5.2.1 Disassemble and reassemble actuator per Sections 1 through Section 4 using
new -11 (low temperature) Service Kit.
5�3 Add an Extended Stop (ES) to Housing Adapter (6-10)
NOTE:
Prior to disassembly, review all of Section 1 Introduction and Section 2 - Actuator
Disassembly, step 2.1 - General Disassembly.
5.3.1 Stop screw (6-30) removal from housing adapter (6-10).
5.3.1.1 Loosen and remove hex nut (6-40) and washer (6-90) from stop screw
(6-30) located in housing adapter (6-10).
5.3.1.2 Remove stop screw (6-30) from housing adapter (6-10).
NOTE:
Prior to reassembly, review all of Section 3 - Actuator Reassembly, step 3.1 - General
Reassembly.
5.3.2 ES (6-30) installation into housing adapter (6-10).
5.3.2.1 Lubricate ES (6-30) and install into housing adapter (6-10).
5.3.2.2 Install O-ring seal (7-30) onto ES (6-30).
NOTE:
Move the O-ring seal (7-30) down the ES until it is next to housing
adapter (6-10).
5.3.2.3 Install washer (4-90) onto ES or stop screw (4-30).
Field Conversions
NOTE:
Push the washer down the ES or stop screw until it is next to the housing
adapter (6-10).
21
Section 5: Field Conversions
August 2015
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).
Service Instructions
137462E Rev. D
5�4 Add an Extended Stop (ES) to Cylinder End Cap (4-20)
NOTE:
Prior to disassembly review all of Section 1 Introduction and Section 2 - Actuator
Disassembly, step 2.1 - General Disassembly.
5.4.1 Stop screw (4-30) removal from end cap (4-20).
5.4.1.1 Loosen and remove hex nut (4-40) and washer (4-90) from stop screw
(4-30) located in end cap (4-20).
5.4.1.2 Remove stop screw (4-30) from end cap (4-20).
5.4.2 ES (4-30) installation.
5.4.2.1 Lubricate ES (4-30) and install into end cap (4-20).
5.4.2.2 Install O-ring seal (5-30) onto ES (4-30).
NOTE:
Move the O-ring seal (5-30) down the ES until it is next to the end cap
(4-20).
5.4.2.3 Install washer (4-90) onto ES (4-30).
NOTE:
Move the washer (4-90) down the ES until it is next to the end cap (4-20).
5.4.2.4 Install hex nut (4-40) onto ES (4-30).
NOTE:
Rotate the hex nut down the ES until it is next to the end cap (4-20).
22
Field Conversions
Service Instructions
137462E Rev. D
Section 5: Field Conversions
August 2015
5�5 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 a M3 is only being installed
into housing adapter (6-10), skip step 3.3.14 during installation. For single M3 addition to
cylinder end cap (4-20), use Section 5.6.
5.5.1 Prior to disassembly, review all of Section 1 Introduction.
5.5.2 Disassemble the actuator per Section 2.1 - General Disassembly, Section 2.2
- Pneumatic Cylinder Disassembly steps 2.2.2 through 2.2.5 and Section 2.3 Housing Disassembly steps 2.3.2 and 2.3.3.
5.5.3 Prior to actuator reassembly, review all of Section 3.1 - General Reassembly, 3.2 Housing Reassembly and 3.3 - Pneumatic Cylinder Reassembly.
5.5.4 If new M3 housing adapter (6-10) is not pre assembled with the M3, then assemble
M3 to the housing adapter (6-10) per Section 3.2 step 3.2.1.
WARNING: M3 INSTALLATION LIMITATIONS
The M3 cannot be installed on a standard CBA actuator unless the M3 targets are installed
on the piston assembly as shown in Figure Number 2. If the M3 is operated with a piston
that does not have a target, the groove pin (12-20) is subject to failure.
5.5.5 Add the M3 targets to the piston assembly (4-50) per Figure Number 2 - M3 piston
targets.
Figure 2 M3 Targets
Field Conversions
5.5.6 Reassemble the actuator per Section 3.2 steps 3.2.14 through 3.2.20, Section 3.3
steps 3.3.1 through to the end of Section 4 - Actuator Testing.
23
Section 5: Field Conversions
August 2015
Service Instructions
5�6 Add an M3 Jackscrew to Cylinder Outer
End Cap (4-20)
5.6.1 Prior to disassembly, review all of Section 1 - Introduction.
5.6.2 Disassemble the actuator per Section 2.1 - General Disassembly, Section 2.2 Pneumatic Cylinder Disassembly steps 2.2 .2 through step 2.2.5.
5.6.3 Prior to actuator reassembly, review all of Section 3.1 - General Reassembly, 3.2 Housing Reassembly, and 3.3 - Pneumatic Cylinder Reassembly.
5.6.4 If new M3 outer end cap (4-20) is not pre assembled with the M3, then assembly
M3 to the outer end cap (4-20) per Section 3.3 step 3.3.14.
WARNING: M3 INSTALLATION LIMITATIONS
The M3 cannot be installed on a standard CBA actuator unless the M3 targets are installed
on the piston assembly as shown in Figure Number 2. If the M3 is operated with a piston
that does not have a target, the groove pin (12-20) is subject to failure.
137462E Rev. D
5.6.5 Add the M3 targets to the piston assembly (4-50) per Figure 2 - M3 piston targets.
5.6.6 Install the assembled M3 outer end cap (4-20) per Section 3.3 steps 3.3.1 through
3.3.13 and steps 13.3.15 through to the end of Section 4 - Actuator Testing.
5�7 Add M11 Override Cylinders and Pump Package
5.7.1 Consult factory for further information.
24
Field Conversions
Service Instructions
137462E Rev. D
Section 6: Troubleshooting
6�1 Fault Insertion
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 Bettis actuators as possible. Reference to equipment not supplied should
be ignored.
Table 3� Fault Location Table
Section 6: Troubleshooting
August 2015
SYMPTOM
Erratic movement
Short stroke
Apparent lack
of torque
POTENTIAL CAUSESREMEDY
Irregular supply of operating
medium
Inadequate lubricationDismantle, relubricate and reassemble
Worn parts
Defective valveConsult the valve OEM's documentation
Incorrectly set stops
(valve and /or actuator)
Hardened grease
Debris left in the cylinder or
housing during maintenance
Defective valve
Inadequate supply pressure
Incorrect speed control settings Adjust speed controls to increase ow
Exhaust port blocked
Pipe work blocked, crushed
or leaking
Defective controls
Defective piston seal
Defective rod seal
Defective housing seal
High valve torque or valve seized Consult the valve OEM documentation
Check operating medium for consistent supply
pressure and correct as necessary
Dismantle. Visually inspect for signicant
wear. Actuator replacement may be required
Check the position of the travel stops and
readjust as necessary
Dismantle, remove any hard grease,
relubricate and reassemble
Disassemble cylinder assembly to remove
debris. Reassemble cylinder assemble as
necessary
Consult the valve manufacturer's
documentation
Ensure supply pressure is above the minimum
operating pressure of the actuator and that
output torque produced at supply pressure
exceeds valve torque demand
Remove and clean the exhaust port silencers
and replace
Examine the pipe work for blockages,
crushed pipe or leakage. Clear or replace
as necessary
Examine the controls, refurbish or renew as
necessary. Refer to component
manufacturer's documentation
Dismantle the cylinder assembly, remove the
defective piston seal. Fit new seal
and reassemble
Dismantle the cylinder assembly, remove the
defective rod seal. Fit new seal
and reassemble
Dismantle the housing assembly, remove the
defective seal. Fit new seal and reassemble
Troubleshooting
25
Section 6: Troubleshooting
August 2015
6�2 Operational Test
6.2.1 Full Stroke Test
The “Full Stroke Test” (“On-line”) must be performed to satisfy the PFD
probability of failure on demand) value. The full stroke test frequencies will be
dened by the nal installer to achieve the dened SIL level.
6.2.1.1 Procedure
6.2.1.1.1 Stroke the actuator/valve assembly two complete open/close
cycles with complete closing of the valve.
6.2.1.1.2 Verify the open/close cycles functioned correctly (e.g. check
locally, or automatically via Logic solver, the correct movement
of the actuator/valve).
Upon successful completion of the above described Full Stroke Test procedure, the
“Test Coverage” can be considered 99%.
6.2.2 Partial Stroke Test (when requested)
The “Partial Stroke Test” (“On-line”) can be performed to improve the PFD
and to satisfy PFD
partial stroke value is 15% of the stroke and the recommended test interval is
about every one to three months.
6.2.2.1 Procedure
6.2.2.1.1 Operate the actuator/valve assembly for No° 1 open/close
6.2.2.1.2 Verify the partial stroke test functioned correctly (e.g. check
(average probability of failure on demand) value. A typical
AVG
cycles 15% of the stroke.
locally, or automatically via logic solver, or via the PST system
the correct movement of the actuator/valve was 15% of the
stroke).
Service Instructions
137462E Rev. D
(average
AVG
value
AVG
26
NOTE:
The above test is only applicable on systems equipped with a partial stroke feature.
Troubleshooting
Service Instructions
137462E Rev. D
Section 7: Removal and Decommissioning
August 2015
Section 7: Removal and Decommissioning
7�1 Removal and Decommissioning
WARNING: FOLLOW PROPER PROCEDURE
Always follow safe work practices remove and disassemble CBA and CBB-Series actuator.
The below basic procedure should not supersede or replace any customer’s plant safety
or work procedures. If a conict 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.
CAUTION: ISOLATE AND POWER OFF ACTUATOR
Make sure actuator is isolated before removing from valve. Turn OFF the power medium
and bleed off all pressure rst, including storage tank (if present). Next, bleed off pilot
pressure, disconnect: pneumatic pressure supply, pilot tubing and electrical wiring
(if equipped).
Before starting the disassembly, a large area should be created around the actuator so to
allow any kind of movement.
Separate the parts composing the actuator according to their nature (ex. metallic, and
plastic materials, uids etc.) and send them to differentiated waste collection sites, as
provided for by the laws and provisions in force.
7.1.1 Drain tanks and remove tubing from actuator. Remove accessories (if equipped)
and controls from actuator.
7.1.2 Remove all equipment mounted on top of actuator (limit switches, end of stroke
valve, and relevant pneumatic/electric connection, etc.)
7.1.3 Remove mounting bolts and actuator is ready to be removed from valve.
For complete actuator tear down, refer to Section 2 of the manual.
World Area Confi guration Centers (WACC) offer sales support, service,
inventory and commissioning to our global customers.
Choose the WACC or sales offi ce nearest you:
NORTH & SOUTH AMERICA
19200 Northwest Freeway
Houston TX 77065
USA
T +1 281 477 4100
Av. Hollingsworth
325 Iporanga Sorocaba
SP 18087-105
Brazil
MIDDLE EAST & AFRICA
P. O. Box 17033
Jebel Ali Free Zone
Dubai
T +971 4 811 8100
P. O. Box 10305
Jubail 31961
Saudi Arabia
T +966 3 340 8650
T +55 15 3413 8888
24 Angus Crescent
ASIA PACIFIC
Longmeadow Business Estate East
P.O. Box 6908 Greenstone
No. 9 Gul Road
#01-02 Singapore 629361
T +65 6777 8211
No. 1 Lai Yuan Road
1616 Modderfontein Extension 5
South Africa
T +27 11 451 3700
EUROPE
Wuqing Development Area
Tianjin 301700
P. R. China
T +86 22 8212 3300
Holland Fasor 6
Székesfehérvár 8000
Hungary
T +36 22 53 09 50
Strada Biffi 165
29017 Fiorenzuola d’Arda (PC)
Italy
T +39 0523 944 411
For complete list of sales and manufacturing sites, please visit
www.emerson.com/actuationtechnologieslocationsor contact us at
info.actuationtechnologies@emerson.com
The Emerson logo is a trademark and service mark of Emerson Electric Co.
TM
is a mark of one of the Emerson family of companies.
Bettis
All other marks are property of their respective owners.
The contents of this publication are presented for information purposes
only, and while every effort has been made to ensure their accuracy,
they are not to be construed as warranties or guarantees, express or
implied, regarding the products or services described herein or their use
or applicability. All sales are governed by our terms and conditions, which
are available on request. We reserve the right to modify or improve the
designs or specifications of our products at any time without notice.
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