Emerson CBA830, CBA730-M3, CBA730-M3HW, CBA830-M3, CBA830-M3HW Disassembly And Reassembly

Service Instructions

137462E Rev. D

August 2015

CBAX30 Double-Acting Series Pneumatic Actuators

Disassembly and Reassembly

Service Instructions

137462E Rev. D

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 Reference Materials ............................................................................. 3

1.5 Service Support Items .................................................................................. 3

1.6 Lubrication Requirements ............................................................................ 3

1.7 General Tool Information .............................................................................. 3

1.8 Actuator Weight ...........................................................................................4

1.9 Actuator Storage ........................................................................................... 4

1.10 Actuator Installation ..................................................................................... 4

1.11 Actuator Start-up .......................................................................................... 5

1.12 Actuator Operation ....................................................................................... 6

Table of Contents

August 2015

Section 2: Actuator Disassembly

2.1 General Disassembly .................................................................................... 7

2.2 Pneumatic Cylinder Disassembly .................................................................. 8

2.3 Housing Disassembly ...................................................................................9

Section 3: Actuator Reassembly

3.1 General Reassembly ................................................................................... 11

3.2 Housing Reassembly ................................................................................. 12

3.3 Pneumatic Cylinder Reassembly .................................................................. 15

Section 4: Actuator Testing

4.1 Actuator Testing ......................................................................................... 19

Section 5: Field Conversions

5.1 High Temperature Service (-10 TRIM) .......................................................... 21

5.2 Low Temperature Service (-11 TRIM) ........................................................... 21

5.3 Add an Extended Stop (ES) to Housing Adapter (6-10) ................................. 21

5.4 Add an Extended Stop (ES) to Cylinder End Cap (4-20) ................................. 22

5.5 Add an M3 Jackscrew to Housing Adapter (6-10) ......................................... 23

5.6 Add an M3 Jackscrew to Cylinder Outer End Cap (4-20) ...............................24

5.7 Add M11 Override Cylinders and Pump Package.......................................... 24

Table of Contents

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Table of Contents

August 2015

Section 6: Troubleshooting

Section 7: Removal and Decommissioning

Section 8: Document Revision ��������������������������������������������28

Appendix A: List of Tables ���������������������������������������������������29

Appendix B: List of Figures ��������������������������������������������������30

Appendix C: List of Drawings ����������������������������������������������31

Service Instructions

137462E Rev. D

6.1 Fault Insertion ............................................................................................. 25

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:

Table 1� CBA-300 Model Numbers

MODEL (1) MODEL (1) MODEL (1)

CBA730 CBA730-M3 CBA730-M3HW
CBA830 CBA830-M3 CBA830-M3HW
CBA930 CBA930-M3 CBA930-M3HW

CBA1030 CBA1030-M3 CBA1030-M3HW

(1) Also includes actuator models with –10 and –11 as a sufx

Section 1: Introduction

August 2015

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 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 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 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 Unied 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

CBA730 130 59 CBA930 155 70.4

CBA730-M3 131 59.4 CBA930-M3 158 71.7

CBA730-

M3HW

CBA830 140 63.5 CBA1030 170 77.1

CBA830-M3 143 64.9 CBA1030-M3 173 78.5

CBA830-

M3HW

(2) Weight is for bare actuator without accessories or valve adaptation.

Approximate Weight (2)

LB KG LB KG

131.5 59.6

143.5 65.1

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)

158.5 71.9

173.5 78.7

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 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.

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 conrms 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 identied 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 orice 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 difcult 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