Emerson Bettis CBA*30-SR series Operating instructions

Service Instructions

137463E Rev. D

August 2015

CBAX30 Spring-Return Series Pneumatic Actuators

Disassembly and Reassembly

Service Instructions

137463E Rev. D

Table of Contents

August 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 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

Section 2: Actuator Disassembly

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

2.2 Spring Cylinder Disassembly........................................................................... 8

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

Section 3: Actuator Reassembly

3.1 General Reassembly ..................................................................................... 10

3.2 Housing Reassembly .................................................................................... 10

3.3 Spring Cylinder Reassembly.......................................................................... 13

Section 4: Actuator Testing

4.1 Actuator Testing .......................................................................................... 16

4.2 Return to Service.......................................................................................... 17

Section 5: Field Conversions

5.1 Fail Mode Reversal (CW to CCW, or CCW to CW) .......................................... 18

Section 6: Troubleshooting

6.1 Fault Insertion .............................................................................................. 19

6.2 Operational Test........................................................................................... 20

Section 7: Removal and Decommissioning

7.1 Removal and Decommissioning ................................................................... 21

Table of Contents

August 2015

Service Instructions

137463E Rev. D

II Table of Contents

Section 8: Document Revision ��22

Appendix A: List of Tables ��23

Appendix B: List of Drawings ��24

B.1 Part No. VA129743, CBA300-SRX Assembly Drawing ................................... 24

B.2 Part No. 129745, CBA300-SRX-M3HW Assembly Drawing ........................... 25

Service Instructions

137463E Rev. D

August 2015

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™ CBAX30-SR spring-return series actuators. The following is

a list of general CBAX30 SR model numbers:

Table 1� CBAX30-SR Model Numbers

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

CBA730-SR CBA730-SR-M3 CBA730-SR-M3HW

CBA830-SR CBA830-SR-M3 CBA830-SR-M3HW

CBA930-SR CBA930-SR-M3 CBA930-SR-M3HW

CBA1030-SR CBA1030-SR-M3 CBA1030-SR-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 Bettis recommends that disassembly of the actuator should be done in a clean

area on a workbench.

August 2015

Service Instructions

137463E Rev. D

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).

M3:

Jackscrew or jackscrew assembly

M3HW:

Jackscrew assembly with handwheel

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.

Service Instructions

137463E Rev. D

August 2015

Section 1: Introduction

Introduction

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 CBAX30-SR assembly drawing use part number VA129743.

1.4.2 CBBX30-SR-M3HW assembly drawing use part number 129745.

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 Bettis 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 CBAX30-SR 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 inch pounds / 226 N-m).

August 2015

Service Instructions

137463E Rev. D

Section 1: Introduction

Introduction

1�8 Actuator Weight

Table 2� Actuator Weight

Actuator Model

Approximate

Weight (2) Actuator Model

Approximate

Weight (2)

LB KG LB KG

CBA730-SR40 (1) 158 71.7 CBA930-SR40 (1) 195 88.5

CBA730-SR60 (1) 160.5 72.8 CBA930-SR60 (1) 202 91.6

CBA730-SR80 (1) 163 73.9 CBA930-SR80 (1) 206.5 93.7

CBA730-SR100 (1) 164 74.4 CBA930-SR100 (1) 205 93.0

CBA830-SR40 (1) 180 81.6 CBA1030-SR40 (1) 220 99.8

CBA830-SR60 (1) 184.5 83.7 CBA1030-SR60 (1) 225.5 102.3

CBA830-SR80 (1) 188 85.3 CBA1030-SR80 (1) 233.5 105.9

CBA830-SR100 (1) 192.5 87.3

(1) When model has -M3HW add 8 pounds / 3.6 kilograms.

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

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

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.

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.

Service Instructions

137463E Rev. D

August 2015

Section 1: Introduction

Introduction

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)

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.

August 2015

Service Instructions

137463E Rev. D

Section 2: Actuator Disassembly

Actuator Disassembly

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.

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