Emerson Bettis CBB Series Service Instructions Manual

Service Instructions

137465E Rev. F

May 2012

CBB-Series Spring Return Pneumatic Actuators

Service Instructions

137465E Rev. F

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

Section 2: Actuator disassembly

2.1 General disassembly ...................................................................................... 5

2.2 Spring cylinder disassembly ........................................................................... 6

2.3 Housing disassembly ..................................................................................... 8

Table of Contents

May 2012

Section 3: Actuator reassembly

3.1 General reassembly ....................................................................................... 9

3.2 Housing reassembly .................................................................................... 10

3.3 Spring cylinder reassembly .......................................................................... 12

Section 4: Actuator Testing

4.1 Actuator testing .......................................................................................... 15

4.2 Return to service ......................................................................................... 16

4.3 Pressure requirement & limitations for CBB-SR actuators ............................. 16

Section 5: Document Revision ��������������������������������������������17

Appendix A: List of Tables ���������������������������������������������������18

Appendix B: List of Drawings ����������������������������������������������19

B.1 Part No. 152230, CBBXXX-SRX Assembly Dwg ............................................ 19

B.2 Part No. 152608, CBBXXX-SRX-M3HW Assembly Dwg ................................ 20

Table of Contents

I

Section 1: Introduction

May 2012

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-SR double acting series actuators.
The following is a list of general CBB-SR models numbers.

Table 1� CBB-SR Model numbers

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

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

Service Instructions

137465E Rev. F

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: APPLICATION OF THREAD SEALANT

Apply the thread sealant per the manufacture’s instructions.

1

Introduction

Service Instructions

137465E Rev. F

1.1.9 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.

NOTE:

Advisory and information comments provided to assist maintenance personnel to carry out
maintenance procedures.

Section 1: Introduction

May 2012

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: ES:

Jackscrew or jackscrew assembly. 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:

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:

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 customers representative
and an authorized Bettis representative.

Introduction

2

Section 1: Introduction

May 2012

1�4 Bettis reference materials

1.4.1 CBBXXX Assembly Drawing use part number 152230.

1.4.2 CBBXXX-M3HW Assembly Drawing use part number 152608.

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 re-lubricated at the beginning of each service interval
using the following recommended lubricants.

Service Instructions

137465E Rev. F

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 & 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 / deepwell socket set and torque wrench (up to 2,000 inch pounds / 226 N-m).

3

Introduction

Service Instructions

137465E Rev. F

1�8 Actuator weight

Table 2� Actuator weight

Section 1: Introduction

May 2012

Actuator
Model

Approximate weight (3)

Actuator
Model

Approximate weight (3)

CBB LB KG CBB LB KG

315-SR40 (1) 22 10.0 520-SR40 (1) 45 20.4
315-SR60 (1) 23 10.4 520-SR60 (1) 48 21.8
315-SR80 (1) 26 11.8 520-SR80 (1) 49 22.2
315-SR100 (1) 25 11.4 520-SR100 (1) 53 24.0
415-SR40 (1) 27 12.2 525-SR40 (2) 62 28.1
415-SR60 (1) 29 13.2 525-SR60 (2) 65 29.5
415-SR80 (1) 30 13.6 525-SR80 (2) 65 29.5
415-SR100 (1) 31 14.1 525-SR100 (2) 67 30.4
420-SR40 (1) 37 16.8 725-SR40 (2) 97 44.0
420-SR60 (1) 39 17.7 725-SR60 (2) 98 44.5
420-SR80 (1) 40 18.1 725-SR80 (2) 104 47.2
420-SR100 (1) 41 18.6 725-SR100 (2) 107 48.5

(1) When model has -M3HW add 2.0 pounds / 0.9 kilograms.
(2) When model has -M3HW add 4.0 pounds / 1.8 kilograms.
(3) Weight is for bare actuator without accessories or valve adaptation.

Introduction

4

Section 2: Actuator Disassembly

May 2012

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: PRESSURE

Pressure applied to the actuator is not to exceed the maximum operating pressure rating

listed on the actuator name tag.

Service Instructions

137465E Rev. F

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, allowing the spring to stroke. The
spring will rotate the yoke to its fail position.

2.1.2 Record the settings of stop screw / ES / M3 jackscrews (1-70) and stop screw / ES
(4-30) before they are loosened or removed.

NOTE:

In place of stop screws the actuator may be equipped with one or two ES (ES = Extended

Stops) or one M3/M3HW (1-70) located on outboard end of housing (1-10).

5

Actuator Disassembly