Flowserve QX Limitorque User Manual

	Limitorque QX	Maintenance
	Electronic Actuator	and Spare Parts
	FCD LMENIM3314-00 - 5/11

Experience In Motion

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

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
2		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

		Limitorque QX Electronic Actuator		FCD LMENIM3314-00 – 5/11
		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		3
		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

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

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
4	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

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11
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		5
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

flowserve.com

Limitorque QX Electronic Actuator	FCD LMENIM3314-00 – 5/11
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

6

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

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.	7

Safety notices are presented in this manual in three forms:

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

cWARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices could result in personal injury or death.

aCAUTION: 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.

1.4Reference 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)

1.5This 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

8

	Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11
2Figure 2.1 - Typical QX Actuator	QX Actuator Subassembly

NOTE: QX-1 and 2 90° unit shown.	9

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

2.1 QX Actuator Subassembly Components

Table 2.1 - Typical QX Actuator Subassembly

Item Number	Description
3	Baseplate
5	Motor cartridge
6	Clutch shaft
7	Clutch 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.

10

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

2.1.3Unit Weights

Table 2.2 - QX Unit Weights

Unit	lb.	kg
QX-1	40	18
QX-2	42	19
QX-3	80	36
QX-4	80	36
QX-5	80	36

NOTE: Weights include B4 stem nut and lubricant.

2.2 Product Identification

2.2.1 Initial Inspection and Recording Suggestions

Upon receipt of the actuator, several steps should be initially followed to ensure condition of equipment and to establish proper record keeping.

1.After removing the actuator from the shipping carton or skid, thoroughly examine it for any physical damage which may have occurred during shipment. If you note any damage, immediately report the damage to the transport company and call Limitorque for further assistance.

2.A nameplate with important information is attached to each actuator. Record the following information for use when you need to contact Limitorque with any questions about your actuator:

•Unit type/size

•Flowserve Limitorque order number

•Serial number

Figure 2.2 - QX Nameplate

Figure 2.3 - QX Nameplate

11

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

2.3 Maintenance

2.3.1 Recommended Maintenance

Under normal operating conditions, the QX is a maintenance-free actuator. Therefore, for normal applications, the actuator will require no formal maintenance program. However, if the actuator is used under severe service conditions or operated in a Hazardous Location, the following maintenance procedures are required:

1.Check the oil level every 50 hours of operation at a minimum. Where conditions are severe due to frequent operation or high ambient temperatures, a more regular inspection interval should be maintained.

2.Change the gear oil every 100 hours of operation. See section 2.3.2 Unit Lubrication.

3.All ball bearings, oil seals, O-rings and quad-rings are to be replaced after 450 hours of operation. See sections 2-3-2 thru 2-3-3.

Clean and lubricate the valve stem regularly to avoid torque build-up and wear due to silting and corrosion. Infrequent operation can lead to corrosion and contamination of the valve stem thread lubricant. Check any thrust bearings that are fitted to the actuator for proper lubrication at regular intervals.

2.3.2 Unit Lubrication

Change oil every 100 hours of operation or if water or other foreign material is found during oil inspection.

Oil Level Inspection and Fill Criteria

To avoid pressurization of the gearcase, the following recommended oil capacities should not be exceeded: (Reference Table 2.3 for oil capacities when mounted in varying positions)

•Actuator viewed in upright position (terminal compartment up / base down) Oil level should be approximately 1 inch (25.4 mm) below the outer surface of the housing at the oil fill port.

•Actuators mounted in other orientations than the upright position should have their oil capacities maintained.

Fill through the highest oil fill port until the oil is at a level that will contact the bottom of the plug when installed in the oil fill port.

NOTE: Do not overfill! Oil will expand during actuator operation. Actuators are shipped with an oil volume suitable for any mounting position. When checking the factory-supplied oil level, excess oil may drain from the highest oil fill port due to the various mounting orientations of each application.

Table 2.3 QX-1 thru 5 Oil Capacities

Unit Description	Fluid Ounces	Litres
QX 1/2	26	0.77
QX-3/4/5	80	2.36

Lubrication Data

Oil Specification – all models

-30°C to +70°C (-22o to + 158o F) units require oil per Petro-Canada SHB-68 or Mobil SHC626

-60°C to +40°C (-76o to + 104o F) units require oil that is 50% Petro Canada SHB-68 with 50% Soltex PAO4

12

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

Figure 2.4 - QX Oil fill /Plug Locations (QX-1 thru 5)

2.3.3 O-Ring and Lubrication

O-rings and seals should be replaced any time an actuator is disassembled. Lubricate with a substance that is compatible with Buna N seals.

2.4 Subassembly Removal and Remounting Procedures

This manual divides each QX actuator subassembly into a Removal and Remounting procedure. Use the following procedures to remove subassemblies for inspection, repair or replacement. Some subassemblies require prior subassembly removal before allowing the desired subassembly removal. Note the First Remove instructions at the beginning of each subassembly removal procedure. Remove these subassemblies first, and then remove the

desired subassembly according to the instructions. Once removed, evaluate subassembly components to determine requirement for a new subassembly. If a new subassembly is required, see Section 2.5. Once components have been identified and replaced, remount following the appropriate Remounting procedures.

2.5 How to Order Replacement Subassemblies

2.5.1 Replacement Parts

Replacement parts are sold in modular subassemblies; therefore, when part replacement is required, order parts at the subassembly levels as shown in this manual. Parts may be ordered from your local Limitorque representative (www. flowserve.com) or direct from the factory:

Telephone: [phone]

Fax: [phone]

Please have the following information, found on the actuator nameplate, available to help us facilitate your order:

•Unit type/size

•Limitorque order number

•Serial number

13

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

2.5.2 Return Procedure

When parts are identified for warranty or other component replacement, a Return Material Authorization (RMA) must be obtained from Flowserve. Contact factory for a RMA number (see contact information in section 2.5.1). All returned parts must be accompanied by documentation with the following information to obtain credit for returned goods:

•Return Material Authorization (RMA)

•Unit type/size

•Flowserve Limitorque order number

•Serial number

Return parts to the address listed below:

Limitorque Actuation Systems

5114 Woodall Road

Lynchburg, VA 24502

2.5 Screw Preload (Torque)

Torque applied to each size screw used in the QX:

Table 2.4 - Screw Preload Torque

	Screw	Screw Preload
	M10	10-12 ft-lbs
	M10 used on Base Plate	17-20 ft-lbs
	QX-3 / 4 / 5
	M8	6-8 ft-lbs
	M6	24-36 inch lbs
	M5	15-20 inch lbs
	M4	8-12 inch lbs
	M3	60-70 inch ounces
	M2	18-22 inch ounces

14

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

3 Remove Actuator from Mounting Adapter

3.1 Actuator Removal with Type B4/B4E Base (Torque)

3.1.1 Removal (Type B4/B4E Base)

Step 1

cWARNING: Hazardous Voltage! Turn off all power sources to actuator before removing actuator from mounting plate. Power sources may include main power or control power. If necessary, disconnect incoming power leads L1, L2, L3, and control wiring from the terminal block.

Figure 3.1 - Torque Nut, F/FA-10, QX-1 & 2 and F/FA-12 and -14, QX-1 thru 5

15

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

Table 3.1 Torque Nut, F/FA-05 and -07, QX-1 & 2 and F/FA-10, QX-1 thru 5

ITEM NUMBER	DESCRIPTION	QTY.
13-7	SCOKET HEAD CAP SCREW	1
16-7	TORQUE NUT	1

Figure 3.2 - Torque Nut, F/FA-05 and -07, QX-1& 2 and F/FA-10, QX-1 thru 5

Remove the bolts that secure the actuator to the mounting adapter. If type B4 or B4E base is used in addition to the standard type B4 or B4E baseplate, you may leave the B4 base attached to the mounting adapter and remove the actuator only. Or if required, you may remove the bolts that mount type B4 base to mounting adapter. This will allow actuator removal along with optional B4 base.

Step 2

cWARNING: Potential high-pressure vessel! Before disassembling your actuator, ensure that the valve or other actuated device is isolated and is not under pressure.

Lift the actuator from mounting adapter.

3.1.2 Remounting (Type B4/B4E Base)

Step 3

Ensure stem nut (#1-22) is secured inside actuator drive sleeve with retaining ring (#1-23). Lower the actuator onto the mating component, making sure to align stem nut key and keyway with mating component.

Step 4

Ensure that the actuator and mounting adapter flange mating holes are aligned correctly.

Sept 5

16

cWARNING: Hazardous Voltage! Turn off all power sources before rewiring incoming power leads L1, L2, L3, and control wiring in the terminal block.

Secure the actuator to the mounting adapter with mounting bolts.

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

Step 6

Reconnect incoming power leads L1, L2, L3, and control wiring to the terminal block. Restore power source when ready for operation.

3.2 Actuator Removal with Type A1/A1E Base (Thrust) – QXM only

3.2.1 Optional Thrust Base Assembly QX-1 & 2

Table 3.2 - Optional Thrust Base Assembly

ITEM NUMBER	DESCRIPTION	QTY.
16-10	TORQUE NUT	1
16-11	BUSHING	1
16-12	O'-RING	1
16-13	O'-RING	1
16-14	ADAPTER PLATE	1
16-15	SOCKET HEAD CAP SCREWS	4
16-16	SPACER, PILOT, ISO ONLY	1
16-17	THRUST BASE ASSEMBLY	1

Figure 3.3 - Optional Thrust Base Assembly

3.2.2 Optional thrust base assembly removal.

Step 1

Remove the four (4) screws (# ) and remove the thrust base subassembly (#16-17) by sliding the base down. If base is ISO remove the spacer (pilot) (#16-16).

Step 2

Remove the four (4) screws (# 16-15) and remove the adapter plate (#16-14) and torque nut (#16-10). Item (#16-11) bushing is pressed into adapter plate and cannot be removed. The torque nut is held in place by the unit drive sleeve

and the bushing (#16-11).

17

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

Table 3.3 - Optional Thrust Base Subassembly

ITEM NUMBER	DESCRIPTION	QTY.
10-1	HOUSING, THRUST BASE	1
10-2	PILOT, THRUST BASE	1
10-3	THRUST NUT	1
10-6	SOCKET HEAD CAP SCREWS	1
10-7	FLAT WASHER	1
10-8	RELIEF FITTING	1
10-10	SOCKET HEAD CAP SCREWS	4
10-11	GREASE FITTING	1
10-12	NEEDLE BEARING	2
10-13	THRUST RACE	2
10-14	QUAD RING	1
10-15	O'-RING	1
10-16	QUAD RING	1

Figure 3.4 - Optional Thrust Base Subassembly

	3.2.3 Thrust base remounting
	Step 1
	Place QX torque nut (#16-10) into unit drive sleeve (#1-11) aligning nut lugs to drive sleeve slots.
	Step 2
	Lightly lubricate ‘O’-rings (#16-12) and (#16-13) and insert into bushing (#16-11) that is pressed into adapter plate
	(#16-14). Slide adapter plate and bushing over end of torque nut and aligning to unit baseplate. Insert screws (#16-15)
	into adapter plate holes and tighten.
18	Step 3
	Align thrust base subassembly nut lugs (#10-3) with QX torque nut (#16-10) slots and slide thrust base on to QX
	unit baseplate aligning pilots. Note; For ISO thrust base pilot spacer (#16-16) must be used to align thrust base to QX
	baseplate. Insert screws (#10-10) into thrust base holes and tighten

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

NOTE: Two procedure options are available for removing the actuator and the thrust base:

1.Remove actuator from the thrust base, leaving the base mounted to the mounting flange or removing the thrust base separately

2.Remove actuator and thrust base as a unit from the mounting flange.

3.2.4 Removal (Type A1/A1E Base) Actuator Removal Separate from Thrust Base

STEP 1

cWARNING: Hazardous Voltage! Turn off all power sources to actuator before removing actuator from mounting plate. Power sources may include main power or control power. If necessary, disconnect incoming power leads L1, L2, L3, and control wiring from the terminal block.

Remove the bolts (#10-10) that secure the actuator to the thrust base assembly (#10).

STEP 2

cWARNING: Potential high-pressure vessel! Before disassembling your actuator, ensure that the valve or other actuated device is isolated and is not under pressure.

Lift actuator from thrust base assembly (#10).

STEP 3

cWARNING: Potential for actuated device to change position! The thrust base will maintain position only if nonbackdriving thread lead is used. Ensure proper thread lead is used in your application before allowing thrust base to be used for maintaining position when actuator is removed.

Thrust base removal (if required)

The valve position will be maintained if a locking thread lead is used on the valve stem. If thrust base removal is required, use the following removal procedure.

Remove the bolts that secure the thrust base to the mounting adapter.

STEP 4

Rotate the thrust base (#10) until it feeds off the threaded stem.

3.2.5 Remounting (Type A1/A1E Base) Actuator Remounting Separate from Thrust Base

STEP 5

Thrust base remounting (if required)

Ensure the thrust base stem nut has the two lugs positioned upward to engage with the drive sleeve slots when actuator is reinstalled onto thrust base. Thread thrust base back onto mounting adapter.

STEP 6

Secure thrust base to mounting adapter with mounting bolts.

STEP 7

Actuator remounting

Lower the actuator onto the thrust base, making sure thrust nut lugs align and properly engage with drive sleeve slots.

STEP 8

19

Install bolts (#10-10) to secure the actuator to the thrust base assembly (#10).

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

STEP 9

cWARNING: Hazardous Voltage! Turn off all power sources before rewiring incoming power leads L1, L2, L3, and control wiring in the terminal block.

Reconnect incoming power leads L1, L2, L3, and control wiring to the terminal block. Restore power source when ready for operation.

3.2.6 Removal (Type A1/A1E Base) Actuator and Thrust Base as a Unit

STEP 1

cWARNING: Hazardous Voltage! Turn off all power sources to actuator before removing actuator from mounting plate. Power sources may include main power or control power. If necessary, disconnect incoming power leads L1, L2, L3, and control wiring from the terminal block.

Actuator and thrust base removal

Remove the bolts that secure the actuator and thrust base (#10) to the mounting adapter.

STEP 2

cWARNING: Potential high-pressure vessel! Before disassembling your actuator, ensure that the valve or other actuated device is isolated and is not under pressure.

Declutch the actuator to manual mode.

STEP 3

Rotate the handwheel until the actuator lifts off the threaded stem.

3.2.7 Remounting (Type A1/A1E Base) Actuator and Thrust Base as a Unit

STEP 4

Actuator and thrust base remounting

Declutch the actuator to manual mode. Lift actuator up to the threaded stem and carefully align threads with thrust base threaded stem nut.

STEP 5

Rotate the handwheel to lower the actuator along the threaded stem and onto the mounting adapter plate.

STEP 6

Install the mounting bolts to secure the actuator and thrust base (#10) to the mounting adapter.

STEP 7

cWARNING: Hazardous Voltage! Turn off all power sources before rewiring incoming power leads L1, L2, L3, and control wiring in the terminal block.

Reconnect incoming power leads L1, L2, L3, and control wiring to the terminal block. Restore power source when ready for operation.

20

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

4 Mechanical Assemblies

4.1 Motor subassembly. QX-1 thru 5.

NOTE: Proper motor testing is required when replacing motor. Consult your Limitorque representative or the

Limitorque factory to replace with correct motor.

Table 4.1 - Motor Parts List

ITEM NUMBER	DESCRIPTION	QTY.
11	MOTOR	1
13-4	SOCKET HEAD CAP SCREWS	5
15-1	'O'-RING	1
15-2	COVER, MOTOR	1
15-6	SOCKET HEAD CAP SCREWS	3

Figure 4.1 - Motor Cover and Motor Subassembly Removal

21

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

4.1.1 Motor subassembly Removal. QX-1 thru 5.

Step 1

cWARNING: Hazardous Voltage! Turn off all power sources to actuator before removing motor assembly. Power sources may include main power or control power.

Using a M6 hex key, remove the three M8 screws (#15-6) that mount the motor cover and remove cover (#15-2) and ‘O’-ring (#15-1) from unit assembly.

NOTE: The controls cover must also be removed to disconnect the motor cable from the motor controller if the motor is to be completely removed. See Section 6.2 for controls cover removal, Section 7.1 for motor connector placement.

Step 2

aCAUTION: The rotor is not connected to the motor housing; when removing the motor, ensure the rotor is carefully removed and not dropped from the motor housing.

Using a M3 hex key, remove the five M4 screws (#13-4) that mount the motor assembly. Remove the motor assembly (#11) from unit by sliding motor out of the unit and if needed disconnect motor connector from motor control board and slide wiring out of unit.

Table 4.2 Motor Subassembly, Item 11

ITEM NUMBER	DESCRIPTION	QTY.
11-1	MOTOR	1
11-2	COUPLING	1
11-3	SPIRAL PIN	1
11-4	PLATE, MOTOR MOUNTING	1
11-5	SOCKET HEAD CAP SCREWS	1

Figure 4.2 - Motor Subassembly, Item11

22

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

4.1.2 Motor subassembly Remounting. QX-1 thru 5.

Step 1

cWARNING: Hazardous Voltage! Turn off all power sources to actuator before removing motor assembly. Power sources may include main power or control power.

If motor wiring was removed reroute wiring thru housing over to the motor control board. Do not connect motor wiring connector until motor is mounted in unit. Rotate motor coupling slot to correct position on motor to match motor cartridge pin orientation noting motor bracket position to unit housing per Figure 4.3 and slide motor assembly into housing aligning the motor coupling bore and slot to the motor cartridge shaft and pin and the motor bracket to the unit housing.

(See Figure 4.3 listed for motor bracket orientation to unit housing).

Figure 4.3 - Motor Bracket Orientation View

Step 2

Reconnect motor wiring connector to motor control board. Install the five M4 screws (#13-4) and tighten.

(See section 7 for motor wiring connection).

Step 3

Lightly lubricate ‘O’-ring (#15-1) and install around motor cover spigot/pilot (#15-2). Slide motor cover spigot/pilot into the unit housing.

Step 4

Fit the 3 screws (#15-6) into motor cover mounting holes and tighten to torque in section 2.

23

flowserve.com

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

4.2 Handwheel cover subassembly, QX-1 thru 5.

NOTE: Sections 4.2 – 4.8 require the actuator to be removed from the mounting plate and the oil drained.

Table 4.3 - Handwheel Cover Assembly

ITEM NUMBER	DESCRIPTION	QTY.
10	HANDWHEEL COVER ASSY	1
13-1	DOWEL PIN	1
13-2	'O'-RING	1
13-3	SOCKET HEAD CAP SCREW	3

Figure 4.4 - Handwheel Cover Assembly

c WARNING: Do not manually operate the actuator with devices other than the installed handwheel and declutch lever. Using force beyond the ratings of the actuator and/or additive forces such as cheater bars, wheel wrenches, pipe wrenches, or other devices on the actuator handwheel or declutch lever may cause serious personal injury and/or damage to the actuator and valve.

4.2.1 – Handwheel cover subassembly Removal, QX-1 thru 5

Step 1

c WARNING: Potential to operate while dangerous mechanical parts are exposed during subassembly removal. To prevent injury, turn off all power sources to actuator before removing top-mounted handwheel assembly. Power sources may include main power or control power.

Using a M5 hex key, remove the three M6 screws (#13-3) that mount the handwheel cover and remove the handwheel cover assembly (#10) and ‘O’-ring (#13-2) from unit assembly. Dowel pin (#13-1) is pressed into the unit housing.

	Note: QX-1 thru 5 Ball bearing (#9-13) may also come out with the handwheel assembly, QX-3,4 and 5 Ball bearing
24	(#9-3) may also come out with the handwheel assembly.

Limitorque QX Electronic Actuator  FCD LMENIM3314-00 – 5/11

Table 4.4 - Handwheel Cover Subassembly Item 10. QX -1 & 2

ITEM NUMBER	DESCRIPTION	QTY.
10-1	COVER, HANDWHEEL	1
10-2	'O'-RING	1
10-3	SHAFT, HANDWHEEL	1
10-4	HANDWHEEL SUBASSEMBLY	1
10-5	RETAINING RING	1

Figure 4.5 - Handwheel Cover Subassembly, Item 10. QX-1 & 2

Table 4.5 - Handwheel Cover Subassembly, Item 10. QX-3 thru 5

ITEM NUMBER	DESCRIPTION	QTY.
10-1	COVER, HANDWHEEL	1
10-2	'O'-RING	1
10-3	SHAFT, HANDWHEEL	1
10-4	HANDWHEEL SUBASSEMBLY	1
10-5	WASHER	2
10-6	HEX NUT	1

25

flowserve.com