Flowserve Limitorque QX Guide

Experience In Motion
Maintenance
and Spare Parts
Limitorque QX
Electronic Actuator
FCD LMENIM3314-01 - 06/18

Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
2
Contents
1 Introduction 7
1.1 Premise 7
1.2 Procedure Emphasis 7
1.3 Important Notes and Warning Statement 8
1.4 Reference Documents 8
1.5 This Document Applies to both QX – 90˚ Actuators and All QXM-Multi-Turn Actuators 8
2 QX Actuator Subassembly 9
2.1 QX Actuator Subassembly Components 10
2.1.1 Product Description 10
2.1.2 Storage 10
2.1.3 Unit Weights 11
2.2 Product Idenitification 11
2.2.1 Initial Inspection and Recording Suggestions 11
2.3 Maintenance 12
2.3.1 Recommended Maintenance 12
2.3.2 Unit Lubrication 12
2.3.3 O-Ring Lubrication 13
2.4 Subassembly Removal and Remounting Procedures 13
2.5 How to Order Replacement Subassemblies 13
2.5.1 Replacement Parts 13
2.5.2 Returning Procedure 14
2.5 Screw Preload (Torque) 14
3 Remove Actuator from Mounting Adapter 15
3.1 Actuator Removal with Type B4/B4E Base (Torque) 15
3.1.1 Removal (Type B4/B4E Base) 15
3.2 Actuator Removal with Type A1/A1E Base (Thrust)–QXM only 17
3.2.1 Optional Thrust Base Assembly QX-1 & 2 17
3.2.2 Optional Thrust Base Assembly Removal 17
3.2.3 Thrust Base Remounting 18
3.2.4 Removal (Type A1/A1E Base) Actuator Removal Separate from Thrust Base 19
3.2.5 Remounting(Type A1/A1E Base)Actuator Remounting Separate from Thrust Base19
3.2.6 Removal (Type A1/A1E Base) Actuator and Thrust Base as a Unit 20
3.2.7 Remounting (Type A1/A1E Base) Actuator and Thrust Base as a Unit 20
4 Mechanical Assemblies 21
4.1 Motor Subassembly. QX-1 thru 5 21
4.1.1 Motor Subassembly Removal. QX-1 thru 5 22
4.1.2 Motor Subassembly Remounting. QX-1 thru 5 23
4.2 Handwheel Cover Subassembly, QX-1 thru 5 24
4.2.1 Handwheel Cover Subassembly Removal, QX-1 thru 5 24
4.2.2 Handwheel Cover Assembly Remounting 27
4.3 Motor Cartridge Subassembly, QX-1 thru 5 27
4.3.1 Motor Cartridge Subassembly Removal, QX-1 thru 5 27
4.3.2 Motor Cartridge Assembly Remounting 28
4.4 Gearing and Clutching 29
4.4.1 Gearing and Clutching Removal 31
4.4.2 Gearing and Clutching Remounting 33
4.5 Pipe Plug 35
4.6 Baseplate 35
4.6.1 Baseplate Removal 35
4.6.2 Baseplate Remounting 37
4.7 Worm Shaft Assembly 37

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Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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4.7.1 Worm Shaft Assembly Removal 38
4.7.2 Worm Shaft Assembly Replacement 38
4.8 Drive Sleeve, Stops and Encoder Shaft Assemblies 41
4.8.1 Drive Sleeve, Mechanical Stops, Encoder Shaft Removal 41
4.8.2 Drive Sleeve, Mechanical Stops and Encoder Shaft Assembly Remounting 42
4.9 Optional Baseplate Assembly, F/FA-05 & -07 QX-1 & 2, F/FA-10 QX-3 thru 5 43
4.9.1 Optional Baseplate Removal 43
4.9.2 Optional Baseplate Remounting 43
4.10 Torque Nut 44
4.10.1 Optional Small Baseplate Removal 45
4.10.2 Optional Small Baseplate Remounting 45
4.11 Optional Thrust Base Assembly QX-1 & 2 45
4.11.1 Optional Thrust Base Assembly Removal 46
4.11.2 Thrust Base Remounting 47
5 Encoder Assemblies 48
5.1 Encoder 90 Degree Unit Removal. QX-1 thru 5 48
5.1.1 90 Degree Encoder Removal 48
5.1.2 90 Degree Encoder Remounting 49
5.2 Multi Turn Encoder. QXM-1 thru 5, All RPMs 50
5.2.1 Multi Turn Encoder Removal 50
5.2.3 Multi Turn Encoder Remounting 52
6 Electronic Assemblies 54
6.1 Terminal Cover 54
6.1.1 Terminal Cover Removal 54
6.1.2 Terminal Cover Remounting 55
6.2 Controls Cover 55
6.2.1 Controls Cover Removal 56
6.2.2 Controls Cover Subassembly Remounting 57
6.3 Control Modules 58
6.3.1 Control Module Removal 58
6.3.2 Control Module Subassemblies 58
6.3.3 Control Module Remounting 61
6.4 Terminal Block 61
6.4.1 Terminal Block Shield 62
6.4.2 Terminal Block Removal 62
6.5 Mounting of Standard and Optional Controls 62
6.5.1 Installation 62
6.5.2 Removal 67
6.6 Optional Transformer 67
6.6.1 Optional Transformer Removal 68
6.6.2 Optional Transformer Remounting 69
7 Electronic Wiring (Cabling) 70
7.1 AC Low Voltage Wiring (cabling) Quick Reference Guide for Control Module and
Main Board. (Less than 250 VAC) 70
7.1.1 AC Low Voltage Module (Version 1) 70
7.1.2 AC Low Voltage Module (Version 2) 71
7.1.3 DC Board Wiring (24 – 48 VDC) 71
7.2 High Voltage Wiring (cabling) Quick Reference Guide. (Greater than 250 VAC) 71
7.2.1 High Voltage Module 71
7.3 Optional Transformer Wiring (cabling) Quick Reference Guide 72
7.3.1 Optional Transformer Harness Wiring Used With Low Voltage Control Module 73
7.3.2 Optional Transformer Harness Wiring Used With High Voltage Control Module 73
7.3.3 Optional Transformer Harness Routing Used With High Voltage Control Module 73
7.4 Terminal Block Wiring Harness Numbers 74

Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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8 Spares and Replacement Parts 75
8.1 Guidelines for Recommended Spare Parts 75
8.1.1 Wear Components 75
8.1.2 Bearings, O-rings, and Seals 75
8.1.3 Critical Components 75
8.2 Recommended Spare Parts for QX Actuators 76
8.2.1 Commissioning and Startup 76
8.2.2 Short-Term Duty 76
8.2.3 Long-Term Duty 76
8.2.4 Severe Duty 76
8.3 Other Concerns 77
9 Regulatory Information 78
9.1 Declaration of Conformity 78
9.2 Specific Conditions for Use — Atex/Cenelec/IECEx Applications 80
9.3 Statement of Compliance with Applicable European Directives 80
Figures
Figure 2.1 Typical QX Actuator 7
Figure 2.2 QX Nameplate 11
Figure 2.3 QX Nameplate 11
Figure 2.4 QX Oil fill /Plug Locations (QX-1 thru 5) 13
Figure 3.1 Torque Nut, F/FA-10, QX-1 & 2 and F/FA-12 and -14, QX-1 thru 5 15
Figure 3.2 Torque Nut, F/FA-05 and -07, QX-1& 2 and F/FA-10, QX-1 thru 5 16
Figure 3.3 Optional Thrust Base Assembly 17
Figure 3.4 Optional Thrust Base Subassembly 18
Figure 4.1 Motor Cover and Motor Subassembly Removal 21
Figure 4.2 Motor Subassembly, Item11 22
Figure 4.3 Motor Bracket Orientation View 23
Figure 4.4 Handwheel Cover Assembly 24
Figure 4.5 Handwheel Cover Subassembly, Item 10. QX-1 & 2 25
Figure 4.6 Handwheel Cover Subassembly, Item 10. QX-3 thru 5 26
Figure 4.7 Handwheel Subassembly, Item 10-4. QX-1 & 2 shown 26
Figure 4.8 Motor Cartridge Assembly Removal 27
Figure 4.9 Motor Cartridge Subassembly, Item 5 28
Figure 4.10 Gearing and clutching, QX-1 & 2 29
Figure 4.11 Gearing and clutching, QX-3 thru 5 30
Figure 4.12 Clutch Shaft Subassembly, Item 6. QX-1 & 2 32
Figure 4.13 Clutch Shaft Subassembly, Item 6. QX-3 thru 5 32
Figure 4.14 Clutch Shaft Subassembly, Item 7 33
Figure 4.15 Clutch Fork Shaft Remounting 34
Figure 4.16 Declutch Spring Assembly View. QX-1 & 2 shown 34
Figure 4.17 Pipe Plug 35
Figure 4.18 Baseplate, F/FA-10 QX-1 & 2, F/FA-12 & 14, QX-3 thru 5 36
Figure 4.19 F/FA-10 QX-1 & 2, F/FA-12 & 14, QX-3 thru 5 Baseplate Subassembly, Item 3 36
Figure 4.20 Worm Shaft 38
Figure 4.21 Drive Sleeve, Stops, and Encoder Shaft Assembly 40
Figure 4.22 Multi-turn Encoder Shaft Subassembly (Item 1-6) 41
Figure 4.23 Stop Groove View 42
Figure 4.24 F/FA-05 / 07, QX-1 & 2 or F/FA-10, QX-3 thru 5 Optional Baseplate 43
Figure 4.25 Torque nut, F/FA-10, QX-1 & 2 and F/FA-12 and -14, QX-1 thru 5 44
Figure 4.26 Torque nut, F/FA-05 and -07, QX-1 & 2 and F/FA-10, QX-1 thru 5 44
Figure 4.27 Optional Thrust Base Assembly QXM Only 45

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Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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Figure 4.28 Optional Thrust Base Subassembly 46
Figure 5.1 90º Encoder Assembly 48
Figure 5.2 Encoder To Subassembly, Item 14-1 49
Figure 5.3 Encoder To Unit Assembly View 49
Figure 5.4 Multi-turn Encoder Assembly 50
Figure 5.5 6.5-Turn Spur Gear Subassembly (Item 17-2) 51
Figure 5.6 20-Turn Spur Gear Subassembly (Item 17-2) 52
Figure 5.7 20-Turn Gear Slot Orientation View 52
Figure 6.1 Terminal Cover Assembly 54
Figure 6.2 Terminal Cover Subassembly 55
Figure 6.3 Controls Cover Assembly 56
Figure 6.4 Controls Cover Subassembly 57
Figure 6.5 Control Module Assembly 58
Figure 6.6 Low Voltage (Less than 250 VAC) Control Module Subassembly 59
Figure 6.7 High Voltage (Greater than 250 VAC) Control Module Subassembly 59
Figure 6.8 DCV Control Module Subassembly 60
Figure 6.9 Bracket Connector Retainer Assembly 61
Figure 6.10 Terminal Block Assembly 62
Figure 6.11 Terminal Block Shield 62
Figure 6.12 Quik Power Without Option Boards 64
Figure 6.13 Quik Power With Option Boards 65
Figure 6.14 Option Board Assembly 66
Figure 6.15 Optional Transformer Assembly 67
Figure 6.16 Optional Transformer Subassembly 68
Figure 7.1 Low Voltage QX Unit Wiring Connections 70
Figure 7.2 Low Voltage QX Unit Wiring Connections (Version 2) 71
Figure 7.3 DC QX Unit Wiring Connections 71
Figure 7.4 High Voltage QX Unit Wiring 72
Figure 7.5 Typical Toroid Transformer Label 72
Figure 7.6 Optional Low Voltage Transformer Harness Wiring 73
Figure 7.7 Optional High Voltage Transformer Harness Wiring 73
Figure 7.8 High Voltage Optional Transformer Harness Assembly Routing 73
Figure 7.9 Optional Transformer Harness Connector to Wire Position per Supply Voltage 74
Figure 7.10 Terminal Block Wiring Harness And Connector Numbers 74
Tables
Table 2.1 Typical QX Actuator Subassembly 10
Table 2.2 QX Unit Weights 11
Table 2.3 QX-1 thru 5 Oil Capacities 12
Table 2.4 Screw Preload Torque 14
Table 3.1 Torque Nut, F/FA-05 and -07, QX-1 & 2 and F/FA-10, QX-1 thru 5 16
Table 3.2 Optional Thrust Base Assembly 17
Table 3.3 Optional Thrust Base Subassembly 18
Table 4.1 Motor Parts List 21
Table 4.2 Motor Subassembly, Item 11 22
Table 4.3 Handwheel Cover Assembly 24
Table 4.4 Handwheel Cover Subassembly Item 10. QX -1 & 2 25
Table 4.5 Handwheel Cover Subassembly, Item 10. QX-3 thru 5 25
Table 4.6 Handwheel Subassembly, Item 10-4 26
Table 4.7 Motor Cartridge Assembly Removal 27l
Table 4.8 Motor Cartridge Subassembly, Item 5 28
Table 4.9 Gearing and Clutching, QX-1 & 2 29

Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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Table 4.10 Gearing and Clutching, QX-3 thru 5 30
Table 4.11 Clutch Shaft Subassembly, Item 6. QX-1 & 2 31
Table 4.12 Clutch Shaft Subassembly Item 6. QX-3 Thru 5 32
Table 4.13 Clutch Shaft Subassembly Item 7 33
Table 4.14 Pipe Plug 35
Table 4.15 Baseplate F/FA-10 QX-1 & 2, F/FA-12 & 14 QX-3 thru 5 36
Table 4.16 Baseplate Subassembly Item 3 36
Table 4.17 Worm Shaft Parts List 37
Table 4.18 Drive Sleeve, Stops, and Encoder Shaft Assembly 40
Table 4.19 Multi-turn Encoder Shaft Subassembly (Item 1-6) 41
Table 4.20 Optional Baseplate Removal 43
Table 4.21 Torque nut, F/FA-10, QX-1 & 2 and F/FA-12 and -14, QX-1 thru 5 44
Table 4.22 Torque nut F/FA-05 and -07 QX-1 & 2 and F/FA-10, QX-1 thru 5 44
Table 4.23 Optional Thrust Base Assembly 45
Table 4.24 Optional Thrust Base Subassembly 46
Table 5.1 90º Encoder Assembly 48
Table 5.2 Encoder Subassembly, Item 14-1 49
Table 5.3 Multi-Turn Encoder Assembly 50
Table 5.4 6.5-Turn Spur Gear Subassembly (Item 17-2) 51
Table 5.5 20-Turn Spur Gear Subassembly (Item 17-2) 51
Table 6.1 Terminal Cover Assembly 54
Table 6.2 Terminal Cover Subassembly 55
Table 6.3 Controls Cover Assembly 55
Table 6.4 Controls Cover Subassembly 56
Table 6.5 Control Module Assembly 57
Table 6.6 Low Voltage (Less than 250 VAC) Control Module Subassembly 58
Table 6.7 High Voltage (Greater than 250 VAC) Control Module Subassembly 59
Table 6.8 DCV Control Module Subassembly 60
Table 6.9 Terminal Block Assembly 61
Table 6.10 Control Board Connectors 66
Table 6.11 Screw Part Numbers 67
Table 6.12 Optional Transformer Assembly 67
Table 6.13 Optional Transformer Subassembly 68
Table 7.1 Connector to Wire Position per Supply Voltage 74

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Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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1 Introduction
1.1 Premise
The Flowserve Limitorque QX actuator components are separated into subassembly groupings. This manual covers
the removal and remounting procedures for each subassembly group. Use these instructions when disassembly is
required for service, maintenance or parts replacement.
1.2 Procedure Emphasis
Please refer to the following methods used to emphasize text throughout this manual. Safety Warnings, Cautions and
Notes present material that is important to user safety. Be sure to read any safety notices you see as they could prevent
equipment damage, personal injury or even death to you or a co-worker.
Safety notices are presented in this manual in three forms:

Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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c WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices
could result in personal injury or death.
a CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in personal injury
and/or equipment damage.
NOTE: Highlights information critical to the user’s understanding of the procedure.
Bold text stresses attention to the details of the procedure.
1.3 Important Notes and Warning Statements
Please read this Maintenance and Spare Parts Manual carefully and completely before attempting to store or perform
maintenance on your QX valve actuator. Further installation, setup and operation instructions are available in the
Installation and Operation manual (LMENIM3306) attached to the actuator declutch lever bracket at shipment.
cWARNING: Be aware of electrical hazards within the actuator and high-pressure hazards of the attached valve
or other actuated device when installing or performing maintenance on your QX actuator. Failure to observe
these precautions could result in serious bodily injury, damage to the equipment or operational difficulty.
cWARNING: Do not manually operate actuator with devices other than installed handwheel and declutch lever.
Using additive force devices (cheater bars, wheel wrenches, pipe wrenches or other devices of this nature)
on the actuator handwheel or declutch lever may cause serious personal injury and/or damage to the actuator
or valve.
1.4 Reference Documents
• Protection, Control and Monitoring features of MX/QX Electric Actuators (Bulletin LMENTB2300)
• QX Control, Performance and Value in Quarter-turn Electric Valve Actuators (Bulletin LMENBR3302)
• QX Installation Manual (Bulletin LMENIM3306)
• QX Quick Mount and Start (Bulletin LMENIM3313)
1.5 This document applies to both QX – 90 degree actuators and all
QXM-multi-turn actuators.
The latest revisions to these documents are available on-line from Flowserve Limitorque’s website, www.flowserve.
com or at www.limitorque.com

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Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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2 QX Actuator Subassembly
Figure 2.1 - Typical QX Actuator
NOTE: QX-1 and 2 90° unit shown.
11 5
6
7
10
15-3
14-4
14-1
3
10-4
14-8
11 5
6
7
10
15-3
14-4
14-1
3
10-4
14-8
11 14-1
5
6
7
10
10-4
15-3
14-8
3
14-4

Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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2.1 QX Actuator Subassembly Components
Table 2.1 - Typical QX Actuator Subassembly
Item Number Description
3Baseplate
5Motor cartridge
6Clutch shaft
7Clutch fork
10 Handwheel cover
10-4 Handwheel
11 Motor
14-1 Encoder
14-4 Terminal block
14-8 Power controls
15-3 Controls cover
2.1.1 Product Description
Your QX actuator controls the opening and closing travel of valves and other actuated devices. OPEN and CLOSED
limits are protected by an absolute encoder that provides optical sensing of valve position and measures valve position
in both motor and handwheel operation. No battery or backup power supply is required. Output torque is derived
from current, voltage and temperature. If the preset torque is exceeded, the motor shuts off. As a result of this reliable
and advanced protection technology, all valve and other actuated devices are protected from potential damage from
overload, improper seating and foreign obstructions.
A range of control and network options is available which can be easily added to the control capabilities already
available on a standard actuator. Contact your local Limitorque distributor or Limitorque sales office for further
information.
2.1.2 Storage
Storage Recommendations
Your QX actuator is double-sealed and weather-proof as shipped, even for explosion-proof applications, providing
all compartment covers and cable entry plugs are left intact. Actuators should be stored in a clean, dry, protected
warehouse until ready for installation. If actuators must be stored outdoors, they should be stored off the ground and
high enough to prevent being immersed in water or buried in snow.
Preferred Storage Orientation
Your QX actuator should be stored with terminal compartment in the vertical position and the drive base down to
obtain optimum service life.