Bettis Q-Series Switch Adjustment and Feedback Mechanism replacement Manuals & Guides

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

Q-Series

Switch Adjustment and Feedback Mechanism replacement

March 2018

2

1

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

Table of Contents

March 2018

Contents

1 Before you start ....................................................................................................4

Scope ...................................................................................................................................................... 4

General safety messages ......................................................................................................................... 4

Required tools ......................................................................................................................................... 5

2 Disassembly procedure .........................................................................................6

3 Reassembly procedure ..........................................................................................9

4 Adjusting the switch points .................................................................................11

3Table of Contents

March 2018

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

1 Before you start

1.1 Scope

This repair manual is intended to give instructions to replace the switch adjustment screws and/or the
feedback mechanism of the Q-Seires Control modules.

1. Repair of the switch adjustment screws may be neccesary in case too much force was applied on the screw
heads and the screw heads were damaged as such.

2. Repair of the feedback mechanism may be neccesary in case too much force was applied on the threads of
the mechanism and threads were damaged as such.

Figure 1 Scope of the manual

2

1

1.2 General safety messages

!

WARNING

Avoid personal injury or property damage from sudden release of process pressure or bursting of parts.
Before performing any maintenance procedures on the QC range of Control Modules:

- Always wear protective clothing, gloves, and eye wear when performing any maintenance procedures to
avoid personal injury or property damage.

- Do not remove the actuator from the valve while the valve is still pressurized.

- Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator.
Be sure the actuator cannot suddenly open or close the valve.

- Use bypass valves or completely shut off the process to isolate the control valve from process pressure.
Relieve process pressure from both sides of the valve.

- Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

- Check with your process or safety engineer for any additional measures that must be taken to protect
against process media.

- Vent the pneumatic actuator loading pressure and relieve any actuator spring pre-compression so the
actuator is not applying force to the valve stem; this will allow for the safe removal of the stem connector.

- Donotremoveorreplacewhilecircuitislivewhenaammableorcombustibleatmosphereispresent.

- Substitution of electronics cartridge, switch cartridge, pilot valve cartridge, pneumatic cartridge, enclosure
and seals must be with parts from Emerson else the suitability for Division 1 or 2 will be impaired. Always use
proper component replacement techniques, as presented in this manual. Improper techniques or component
selectionmayinvalidatetheapprovalsandtheproductspecications,asindicatedinapplicableControl
module Installation Guides and may also impair operations and the intended function of the device.

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Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

March 2018

IMPORTANT

When replacing any of the components of the Control Module, the maintenance should be performed in an
instrument shop whenever possible. Make sure that the electrical wiring and pneumatic tubing is
disconnected prior to disassembling the instrument.

1.3 Required tools

In order to replace the switch adjustment screws and/or feedback mechanism below tool are required.

Figure 2 Required tools

Plastic mallet

Set of metric

allen keys

Punch drive

Slot screw

driver or

equivalent

E-clips tool

for size

2.5mm

5

March 2018

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

2 Disassembly procedure

IMPORTANT

Inordertoreplacetheadjustmentscrews,rstthefeedbackmechanismneedstobedisassembled.

1. Remove the cover screws on the back side of the control module. Check if the O-ring seals are in good shape.
Replace if neccesary.

Figure 3 Remove the cover screws

3 mm Allen key

2. Remove the cover and guide bushing. Check if the O-ring seals are in good shape. Replace if neccesary.

Figure 4 Remove cover and guide bushing

Pay attention
to the
two bound
seal washers

Pay attention to the

two bound seal washers

Guide

bushing

6

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

!

WARNING - WEAR SAFETY GLASSES

Watch out for the spring when release the screw driver after remove the e-clip.

3. Remove the E-clips from groove using the slot screw driver.

Figure 5 Remove E-Clips

March 2018

4. Take out the feed back mechanism. The plastic adjustment screws are under the feed back mechanism.

Figure 6 Remove feedback mechanism

Adjustment

screws

7

March 2018

Repair Instruction Manual

5. Punch the plastic screws from bottom untill they are free to be removed from the top.

Figure 7 Remove the adjustment screws

Adjustment

screws

DOC.SAFM.Q4.E Rev. 0

8

Repair Instruction Manual

Heads of setting screws

DOC.SAFM.Q4.E Rev. 0

March 2018

3 Reassembly procedure

IMPORTANT

Check before replacing that both plastic adjustment screws have two O-rings in the top and bottom groove.

1. Mountthenewadjustmentscrewsandpressthemdownuntiltheyareushwiththebody.

Figure 8 Mount the new adjustment screws

O-ring seals

2. Adjust the orientation of the heads of setting screws of the feedback mechanism to match the direction of
new adjustment screws.

Figure 9 Adjust the orientation of the heads of setting screws

of the feedback
mechanism

3. Place the feedback mechanism back into housing. The mechanism can be pressed down to the same level
of the machined surface if the rotation of the screw and plastic are matched in step 2.

4. Place the spring back and put the washer on, make sure the direction of washer is correct so that the E-clip
can sit in.

Figure 10 Place the feedback mechanism back

Press down to the same level

Place the spring back and put the
washer on top

9

March 2018

!

WARNING - WEAR SAFETY GLASSES

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

Wear safety glasses when compressing the spring.

Releaseyourngersslowlyaftermountingthee-clip.

Try a different angle if you fail to compress the spring and washer.

5. Press the spring with spring washer down untill the groove and the switch operating rod is visible.

6. Use the e-clip tool to mount the e-clip in the groove.

Figure 11 Mount the E-clip

Groove on switch operating rod.

7. Place back the bushing and mount the cover back in place. Tighten the screws with 8.85 lbf.in (0.73 lbf.ft or
1 Nm) of torque.

IMPORTANT

Make sure that the bound seals are in place when mounting the cover screws.

Figure 12 Place back the bushing and mount the cover

Guide bushing

Make sure that the bound seals
are in place when mounting the
cover screws

10

Repair Instruction Manual

DOC.SAFM.Q4.E Rev. 0

March 2018

4 Adjusting the switch points

In order to prevent damage again to the adjustment screws or feed back mecahanism, we strongly recom­mend to follow the instruction for switch point adjustment as per section 5 of the installation guides as
shipped with each Control Module.

Additionally for below control modules, “Step-By-Step” setting instruction sheets are available.

Control modules Brand Installation guide "Step-By-Step" setting instruction

QC41,QC42 and QC43 FieldQ DOC.IG.QC41.1 DOC.SAI.QC41.EN

QC40 ASI FieldQ DOC.IG.QC40.1 DOC.SAI.QC40.EN

QC41,QC42 and QC43 Bettis Q-Series DOC.IG.BQC41.1 DOC.SAI.QC41.EN

QC40 ASI Bettis Q-Series DOC.IG.BQC40.1 DOC.SAI.QC40.EN

11

For complete list of sales and manufacturing sites, please visit
www.emerson.com/actuationtechnologieslocations or contact us at
[e-mail]

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 [phone]

Av. Hollingsworth
325 Iporanga Sorocaba
SP 18087-105
Brazil
T [phone]

ASIA PACIFIC

No. 9 Gul Road
#01-02 Singapore 629361
T [phone]

No. 1 Lai Yuan Road
Wuqing Development Area
Tianjin 301700
P. R. China
T [phone]

MIDDLE EAST & AFRICA

P. O. Box 17033
Jebel Ali Free Zone
Dubai
T [phone]

P. O. Box 10305
Jubail 31961
Saudi Arabia
T [phone]

24 Angus Crescent
Longmeadow Business Estate East
P.O. Box 6908 Greenstone
1616 Modderfontein Extension 5
South Africa
T [phone]

EUROPE

Holland Fasor 6
Székesfehérvár 8000
Hungary
T [phone]

Strada Biffi 165
29017 Fiorenzuola d’Arda (PC)
Italy
T [phone]

www.emerson.com/bettis

©2018 Emerson. All rights reserved.

The Emerson logo is a trademark and service mark of Emerson Electric Co.
Bettis

TM

is a mark of one of the Emerson family of companies.

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.

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 [phone]

Av. Hollingsworth
325 Iporanga Sorocaba
SP 18087-105
Brazil

MIDDLE EAST & AFRICA

P. O. Box 17033
Jebel Ali Free Zone
Dubai
T [phone]

P. O. Box 10305
Jubail 31961
Saudi Arabia
T [phone]

T [phone]

24 Angus Crescent

ASIA PACIFIC

Longmeadow Business Estate East

P.O. Box 6908 Greenstone
No. 9 Gul Road
#01-02 Singapore 629361
T [phone]

No. 1 Lai Yuan Road

1616 Modderfontein Extension 5

South Africa

T [phone]

EUROPE

Wuqing Development Area
Tianjin 301700
P. R. China
T [phone]

Holland Fasor 6

Székesfehérvár 8000

Hungary

T [phone]

Strada Biffi 165

29017 Fiorenzuola d’Arda (PC)

Italy

T [phone]

For complete list of sales and manufacturing sites, please visit
www.emerson.com/actuationtechnologieslocations or contact us at
[e-mail]

www.emerson.com/bettis

©2018 Emerson. All rights reserved.

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.