Emerson Bettis GTD Series Operating instructions

Service Instructions

133893 Rev. C

January 2013

GTD Series Actuators

Service Instructions

133893 Rev. C

Table of Contents

January 2013

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 Fluid Requirements ....................................................................................... 3

1.8 General Tool Information ............................................................................... 3

Section 2: Actuator Disassembly

2.1 General Disassembly ..................................................................................... 4

2.2 GTD Gas Cylinder Disassembly ....................................................................... 4

2.3 GTO Oil Cylinder Disassembly ........................................................................ 5

2.4 Drive Module Disassembly ............................................................................. 6

Section 3: Actuator Reassembly

3.1 General Reassembly ...................................................................................... 9

3.2 Drive Module Reassembly .............................................................................. 9

3.3 GTD Gas Cylinder Reassembly ...................................................................... 12

3.4 GTO Oil Cylinder Reassembly ....................................................................... 16

3.5 Actuator Testing .......................................................................................... 18

Section 4: Module Removal and Installation

4.1 GTO Oil Cylinder Removal ............................................................................ 19

4.2 GTO Oil Cylinder Installation ........................................................................ 20

Section 5: Actuator Support Information

5.1 Weights By Item Number And Actuator Housing Size .................................. 22

5.2 GTD01 Tool Style And Wrench Size .............................................................. 23

5.3 GTD2 Tool Style and Wrench Size ................................................................ 24

5.4 GTD3 Tool Style and Wrench Size ................................................................ 25

5.5 GTD4 Tool Style And Wrench Size ................................................................ 26

5.6 GTD5 Tool Style And Wrench Size ................................................................ 27

5.7 GTD7 Tool Style and Wrench Size ................................................................ 28

Section 6: Document Revision ��29

Appendix A: List of Tables ��30

Appendix B: List of Drawings ��31

Service Instructions

133893 Rev. C

January 2013

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 GTD01X0X, GTD2X0X, GTD3X0X, GTD4X0X, GTD5X0X,

and GTD7X0X Double Acting Series Actuators. These actuators will have one

single GTD gas cylinder (Gas) utilizing tie bar construction and one single GTO oil

cylinder (Hydraulic) utilizing tie bar construction.

1.1.2 Normal recommended service interval for this actuator series is ve years to

maximum total life cycle.

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

gas pressure has been removed from the actuator.

1.1.4 Remove all piping and mounted accessories that will interfere with the actuator

assemblies(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 stop screw plug side of the housing (1-10)

as a reference and this side will be considered the front side of the actuator. The

housing cover (1-20) will be the top of the actuator.

1.1.8 Actuator Cylinder/Module weights are listed in Section 5 Table 5.1.

1.1.9 When removing seals from seal grooves, use a commercial seal removing tool or a

small screwdriver with sharp corners rounded off.

1.1.10 Use a non-hardening thread sealant on all pipe threads.

CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS

Apply the thread sealant per the manufacture’s instructions.

1.1.11 Bettis recommends that disassembly of the actuator should be done in a clean

area on a work bench.

Service Instructions

133893 Rev. C January 2013

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).

1�3 General Safety Information

Products supplied by Bettis, in its "as shipped" condition, are intrinsically safe if the instruc-

tions contained within this service instruction are strictly adhered to and executed by well-

trained, equipped, prepared and competent personnel.

WARNING: READ WARNING MESSAGES CAREFULLY

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 PLANT SAFETY PROCEDURES

This procedure should not supersede or replace any customers plant safety or work

procedures. If a conict arises between this procedure and the customers procedures

the differences should be resolved in writing between an authorized customers

representative and a authorized Bettis representative.

Service Instructions

133893 Rev. C

January 2013

Section 1: Introduction

Introduction

1�4 Bettis Reference Materials

1.4.1 Assembly Drawing for GTD01 through GTD7 Series Actuators use part number

133202.

1�5 Service Support Items

1.5.1 Bettis Service Kits.

1.5.2 Non-hardening thread sealant.

1�6 Lubrication Requirements

1.6.1 Bettis ESL-4, 5 & 10 lubricant. This lubricant is to be used in the Drive Module and

GTD Gas Cylinder.

NOTE:

Bettis ESL-4, 5 & 10 lubricant tube(s) are contained in the Bettis Service Kits.

1.6.2 Lubricants, other than listed in step 1.6.1, should not be used without prior written

approval of Bettis Product Engineering.

1�7 Fluid Requirements

1.7.1 For use in the GTO Oil Cylinder use Dexron Automatic Transmission Fluid, or as

specied.

1.7.2 This uid is the recommended uid only and does not limit the use of other

hydraulic uids compatible with supplied seals and coatings.

1�8 General Tool Information

1.8.1 Tools: All tools are American Standard inch. Large adjustable wrench, two (2) large

screwdrivers, Allen wrench set, set of open/box-end wrenches, rubber or leather

mallet, torque wrench (up to 5,000 inch pounds), breaker bar, and a 1/2" drive

socket set. For recommended tool and wrench sizes refer to Section 5 Tables 5.2

through 5.7

Service Instructions

133893 Rev. C January 2013

Section 2: Actuator Disassembly

Actuator Disassembly

Section 2: Actuator Disassembly

2�1 General Disassembly

WARNING: CHECK FOR DANGEROUS GAS AND LIQUIDS

It is very possible, that the actuator may contain a dangerous gas such as (Sour gas/H2S,

Oxygen, Nitrogen, etc.) and/or liquids such as (Condense, Descalers, Petroleum bases,

etc.). Ensure that all proper measures have been taken to prevent dangerous exposure or

release of these types of residues before commencing any work.

2.1.1 Section 2 - Actuator Disassembly is written to either completely disassemble the

entire actuator or can be used to disassemble individual actuator assemblies as

needed (i.e., GTD Gas Cylinder, Drive Module or GTO Oil Cylinder).

2.1.2 The GTD gas cylinder is to be disassembled while still attached to the Drive

Module.

2.1.3 The GTO oil cylinder can be disassembled while still attached to the Drive Module

or it can be removed from the Drive Module and disassembled separate to the

actuator (refer to Section 5 – Module, Cylinder Removal And Installation).

CAUTION: CONTAIN HYDRAULIC FLUID

Using some means to contain hydraulic uid as the tubing (piping) is disconnect

from the GTO outer end cap (7-80) and inner end cap (7-10).

2.1.4 Disconnect all hydraulic uid lines to GTO oil cylinder outer end cap (7-80) and

inner end cap (7-10). Drain as much of the hydraulic uid as possible.

2.1.5 To ensure correct re-assembly; that is, with GTO oil cylinder or GTD gas cylinder

on same end of Drive Module as was, mark or tag right (or left) and mark mating

surfaces.

2�2 GTD Gas Cylinder Disassembly

NOTE:

Review Section 2 notes and steps 2.1.1 through 2.1.5 General Disassembly before

proceeding with GTD gas cylinder disassembly.

WARNING: DISCONNECT HYDRAULIC PRESSURE

If not already removed disconnect all operating pressure from actuator GTD gas cylinder.

2.2.1 Mark and record location of the ports on outer end cap (3-80) and

inner end cap (3-10).

2.2.2 The setting of stop screw (3-180) should be checked and setting recorded before

loosened or removed.

Service Instructions

133893 Rev. C

January 2013

Section 2: Actuator Disassembly

Actuator Disassembly

NOTE:

The stop screw will be removed later in this procedure.

2.2.3 Remove the jam nut (3-190) and o-ring seal (4-100) from stop screw (3-180).

2.2.4 Remove hex nuts (3-90), with lockwashers (3-95), from tie bars (3-20).

2.2.5 Remove outer end cap (3-80) from cylinder (3-70). and tie bars (3-20).

2.2.6 Remove stop screw assembly (3-180) from the inboard side of outer end cap (3-80).

2.2.7 Unscrew and remove tie bars (3-20) from inner end cap (3-10).

2.2.8 Remove cylinder (3-70) from piston (3-30) and inner end cap (3-10).

2.2.9 Refer to assembly drawing page 2 of 2 Detail "C". Remove two split ring halves (3-

50) and one retainer ring (3-60) from outboard end of piston rod assembly (3-40).

2.2.10 Remove the piston (3-30) from piston rod assembly (3-40).

2.2.11 On model GTD4008.0 remove the end cap/cylinder adapter (3-260) from inner

end cap (3-10).

2.2.12 Remove o-ring seal (4-70) from piston rod assembly (3-40).

2.2.13 Remove the remaining two split ring halves (3-50) and one retainer ring (3-60)

from piston rod assembly (3-40).

2.2.14 Remove socket cap screws (3-115) with lockwashers (3-110) from

inner end cap (3-10).

2.2.15 Refer to assembly drawing page 2 of 2 Detail "B". Remove hex nuts (3-105) from

socket cap screws (3-100).

2.2.16 Remove socket cap screws (3-100) with lockwashers (3-110) from

inner end cap (3-10).

2.2.17 Remove inner end cap (3-10) off of piston rod assembly (3-40).

2.2.18 Unscrew and remove piston rod assembly (3-40) from drive module.

2.2.19 It is not necessary to remove pipe plugs (3-210) from inner end cap (3-10) and

outer end cap (3-80) for normal or routine actuator service.

2�3 GTO Oil Cylinder Disassembly

NOTE:

Review Section 2 notes and steps 2.1.1 through 2.1.4 General Disassembly before

proceeding with GTO oil cylinder disassembly.

The GTO oil cylinder can either be disassembled piece by piece or removed per

Section 4.1 and disassembled on a work bench per the following steps.

2.3.1 Mark and record location of the ports on outer end cap (7-80) and

inner end cap (7-10).

2.3.2 The setting of stop screw (7-180) should be checked and setting recorded before

loosened or removed.

NOTE:

The stop screw will be removed later in this procedure.

Service Instructions

133893 Rev. C January 2013

Section 2: Actuator Disassembly

Actuator Disassembly

2.3.3 Remove the jam nut (7-190) from stop screw (7-180).

2.3.4 Remove stop screw (7-180) from outer end cap (7-80).

2.3.5 Remove hex nuts (7-90), with lockwashers (7-95), from tie bars (7-20).

2.3.6 Remove outer end cap (7-80) from cylinder (7-70) and tie bars (7-20).

2.3.7 Unscrew and remove tie bars (7-20) from inner end cap (7-10).

2.3.8 Remove the cylinder (7-70) from piston (7-30) and inner end cap (7-10).

2.3.9 Refer to assembly drawing page 2 of 2 Detail "E". Remove two split ring halves (7-

50) and one retainer ring (7-60) from outboard end of piston rod assembly (7-40).

2.3.10 Remove the piston (7-30) from piston rod assembly (7-40).

2.3.11 Remove the o-ring seal (8-70) from piston rod assembly (7-40).

2.3.12 Remove the remaining two split ring halves (7-50) and one retainer ring (7-60)

from piston rod assembly (7-40).

2.3.13 Remove socket cap screws (7-115) with lockwashers (7-110) from

inner end cap (7-10).

2.3.14 Refer to assembly drawing page 2 of 2 Detail "D". Remove hex nuts (7-105) from

socket cap screws (7-100).

2.3.15 Remove socket cap screws (7-100) with lockwashers (7-110) from

inner end cap (7-10).

2.3.16 Remove inner end cap (7-10) off of piston rod assembly (7-40).

2.3.17 Unscrew and remove piston rod assembly (7-40) from drive module.

2.3.18 It is not necessary to remove pipe plugs (7-210) from inner end cap (7-10) and

outer end cap (7-80) for normal or routine actuator service.

2�4 Drive Module Disassembly

NOTE:

Review Section 2 notes and steps 2.1.1 through 2.1.5 General Disassembly before proceed-

ing with Drive Module Disassembly.

2.4.1 If not already removed remove piston rod assemblies (3-40) and (7-40) from drive

module (1-10).

NOTE:

For steps 2.4.2 through 2.4.9 refer to assembly drawing page 2 of 2 Section A-A and Detail “A”.

2.4.2 Before removing position indicator (1-220), record or mark it's position. Remove

position indicator (1-220).

NOTE:

Step 2.4.3 is used only on GTD01, GTD2 and GTD3 Drive Modules. Drive Modules GTD4

and GTD5 will skip steps 2.4.3 and continue with step 2.4.4.

Service Instructions

133893 Rev. C

January 2013

Section 2: Actuator Disassembly

Actuator Disassembly

2.4.3 Remove one vent check assembly (13) from top of housing cover (1-20).

2.4.4 Unscrew and remove hex cap screws (1-160) with lockwashers (1-170) from yoke

cover (1-150).

2.4.5 Remove yoke cover (1-150) from housing cover (1-20).

2.4.6 Mark and record the orientation of the position indicator assembly (1-140) in

relation to the top of yoke (1-70).

2.4.7 Remove position indicator assembly (1-140) from top of yoke (1-70).

2.4.8 Remove spring pin (1-100) from top of yoke (1-70).

2.4.9 Remove hex cap screws (1-110), with lockwashers (1-115) or with lockwashers

(1-170), from housing cover (1-20).

NOTE:

Steps 2.4.10 and 2.4.11 are used only on GTD7 drive module (refer to assembly drawing

note number ve). Drive modules GTD01, GTD2, GTD3, GTD4 and GTD5 will skip steps

2.4.10 and 2.4.11 and continue with step 2.4.12.

2.4.10 Remove hex cap screws (1-120), with lockwashers (1-115), from housing cover (1-20).

2.4.11 Using hex cap screws (1-110), install into holes vacated by hex cap screws (1-120).

Use these hex cap screws to jack the housing cover up for removal. Alternately

rotate the hex cap screw clockwise until housing cover (1-20) is clear of groove

pins (1-130).

NOTE:

GTD01, GTD2, GTD3 and GTD4 model housing cover (1-20) will have cast tabs for placing

prying tools to aid in cover removal.

2.4.12 Remove housing cover (1-20) from housing (1-10).

NOTE:

Groove pins (1-130) will remain in housing cover (1-20) when housing cover is removed

from housing (1-10). Groove pins (1-130) should not be removed from housing cover (1-

20) unless they are damaged and require new replacements.

2.4.13 Remove guide bar (1-90) from housing (1-10).

2.4.14 Rotate the arms of yoke (1-70) to the center position of housing (1-10).

2.4.15 Remove yoke (1-70) with yoke pin (1-80), guide block assembly (1-30) and two

yoke/guide block bushings (2-30) by lifting yoke up and out of the housing (1-10).

2.4.16 Remove yoke pin (1-80) by inserting 3/8"-16 UNC screw into top of the yoke pin

and pull straight up and out.

2.4.17 Remove the guide block assembly (1-30) from between the arms of yoke (1-70).

2.4.18 Remove the yoke/guide block bushing (2-30) from top of guide block assembly

(1-30).

2.4.19 Remove the yoke/guide block bushing (2-30) from the top of the lower yoke arm

of yoke (1-70).

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