Flowserve MT User Manual
USER INSTRUCTIONS
Limitorque MT Series
FCD LMENIM4201-00 – 06/10
Installation
Operation
Maintenance
Experience In Motion
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
Contents
1 Introduction 5
1.1 Purpose 5
1.2 User Safety 5
2 Product Capabilities and Features 6
2.1 Product Identification 6
2.2 Initial Inspection and Recording of Operator Data 7
2.3 Storage Procedure 8
3 Operator Weights 9
4 Installation Instructions 10
4.1 Safety Precautions 10
4.2 Safety Practices 11
4.3 Installation 11
4.3.1 Installing an Operator with a Threaded Stem Nut 11
4.3.2 Installing an Operator with a Blank Stem Nut (MT-2, 3 and 4) 11
4.3.3 Installing an Operator with a Blank Stem Nut (MT-4) 12
5 Lubrication 13
5.1 Lubrication Inspection 13
5.2 Factory Lubricant 13
5.3 Minimum Lubricant Qualities Required 14
6 Disassembly and Reassembly 15
6.1 Disassembly and Reassembly of MT-2 16
6.1.1 Disassembly 16
6.1.2 Reassembly 16
6.2 Disassembly and Reassembly of MT-3 18
6.2.1 Disassembly 18
6.2.2 Reassembly 18
6.3 Disassembly and Reassembly of MT-4 20
6.3.1 Disassembly 20
6.3.2 Reassembly 20
6.4 Disassembly and Reassembly of Spur Gear Attachments 22
6.4.1 Disassembly of 3:1 Spur Gear Attachment for MT-2 22
6.4.2 Reassembly of 3:1 Spur Gear Attachment for MT-2 22
6.4.3 Disassembly of 6.3:1, 10.3:1, and 10.8:1
Spur Gear Attachments for MT-3 23
6.4.4 Reassembly of 6.3:1, 10.3:1, and 10.8:1
Spur Gear Attachments for MT-3 23
6.4.5 Disassembly of 5:1 Spur Gear Attachment for MT-4 25
6.4.6 Reassembly of 5:1 Spur Gear Attachment for MT-4 25
6.4.7 Disassembly of 17.5:1 Spur Gear Attachment for MT-4 27
6.4.8 Reassembly of 17.5:1 Spur Gear Attachment for MT-4 27
7 How to Order Parts 30
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
Figures
Figure 2.1 – MT Nameplate 8
Figure 6.1 – MT-2 Parts Diagram, Side View 17
Figure 6.2 – MT-2 Parts Diagram, Base View 17
Figure 6.3 – MT-3 Parts Diagram 19
Figure 6.4 – MT-4 Parts Diagram 20
Figure 6.5 – 3:1 SGA Parts Diagram for MT-2 22
Figure 6.6 – 6.3:1, 10.3:1, and 10.8:1 SGA Parts Diagram for MT-3 24
Figure 6.7 – 5:1 SGA Parts Diagram for MT-4 26
Figure 6.8 – 17.5:1 SGA Parts Diagram for MT-4 28
Tables
Table 3.1 – Operator Weights 9
Table 5.1 – Lubricant Quantities 14
Table 6.1 – Quantity of Ball Bearings 15
Table 6.2– MT-2 Parts List 17
Table 6.3 – MT-3 Parts List 19
Table 6.4 – MT-4 Parts List 21
Table 6.5 – 3:1 SGA Parts List for MT-2 23
Table 6.6 – 6.3:1, 10.3:1, and 10.8:1 SGA Parts List for MT-3 24
Table 6.7 – 5:1 SGA Parts List for MT-4 26
Table 6.8 – 17.5:1 SGA Parts List for MT-4 29
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
Introduction
1.1 Purpose
This Installation, Operation and Maintenance Manual (IOM) explains how to install and maintain
the MT bevel gear operator. Information on installation, disassembly, lubrication, and spare parts is
provided.
1.2 User Safety
Safety notices in this manual detail precautions the user must take to reduce the risk of personal
injury and damage to the equipment. The user must read and be familiar with these instructions
before attempting installation, operation, or maintenance. Failure to observe these precautions could
result in serious bodily injury, damage to the equipment, void of the warranty, or operational difficulty.
Safety notices are presented in this manual in three forms:
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 gear operator’s installation
and operation.
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Product Capabilities
2
and Features
Limitorque MT Series FCD LMENIM4201-00 – 06/10
Designed to make operation of multi-turn valves easier The MT gear operator makes it easier to both
manually operate multi-turn valves and convert to a motorized service.
Built for reliable valve control — whether manual or motorized The MT offers torque ranges up to
6,000 ft-lb (8,135 N m) and thrust capacities to 150,000 lb (667 kN) for any application demanding
superior strength and accuracy.
Easily adaptable for other applications The MT is designed to be configured to each customer’s needs:
• Optional handwheel available for manual actuation
• Add a spur gear attachment for greater mechanical advantage
• Couple with an electric actuator from Limitorque for an economical, motorized, multi-turn package
2.1 Product Identification
The operator nameplate is located on top of the torque housing, over the input shaft. The nameplate
provides the product type and size, ratio, order and serial numbers, lubrication type and tagging
information.
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
2.2 Initial Inspection and Recording of Operator Data
c WARNING: Read this Installation, Operation and Maintenance Manual carefully and completely
before attempting to store the gear operator.
Upon receipt of the gear operator, inspect the condition of the equipment and record nameplate
information.
1. Carefully remove gear operator from shipping carton or skid. Thoroughly examine the equipment
for any physical damage that may have occurred during shipment. If damaged, immediately
report the damage to the transport company.
2. A nameplate is attached to each gear operator with the following information:
• Operator Size
• Limitorque Order Number
• Ratio
• Serial Number
Record this information for future reference, for ordering parts or obtaining further information.
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Figure 2.1 – MT Nameplate
Limitorque MT Series FCD LMENIM4201-00 – 06/10
2.3 Storage Procedure
NOTE: The following is the recommended storage procedure to retain maximum product integrity
during storage. Failure to comply with recommended procedure will void the warranty.
Storage (Less Than One Year)
Operators should be stored in a clean, dry, protected warehouse and should be stored on wooden
skids to protect the machined mounting flange. If the operators must be stored outside, they must be
covered in polyethylene protection with silica gel crystals to absorb moisture. Input shafts should be
rotated every three months to mix lubricant.
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
Operator Weights
The approximate weights of the gear operators with solid (blank) stem nut, motorized adapter, with
and without spur gear attachment, are provided below:
Table 3.1 – Operator Weights
Operator Without SGA With SGA
lb kg lb kg
MT-2 95 43 124 56
MT-3 218 99 273 124
MT-4 745 339 875 398
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Limitorque MT Series FCD LMENIM4201-00 – 06/10
Installation Instructions
4.1 Safety Precautions
c WARNING: Read this Installation, Operation and Maintenance Manual carefully and completely
before attempting to install, operate, or troubleshoot the Limitorque operator.
c WARNING: Potential HIGH PRESSURE vessel — be aware of high-pressure hazards associated
with the attached valve or other actuated device when installing or performing maintenance
on the operator. Do not remove the operator mounting bolts from the valve or actuated device
unless the valve or device stem is secured or there is no pressure in the line.
c WARNING: For maintenance and/or disassembly of the operator while installed on the valve,
ensure that the operator is not under thrust or torque load. If the valve must be left in service, the
valve stem must be locked in such a way as to prevent any movement of the valve stem.
c WARNING: Do not manually operate the operator with devices other than the installed hand-
wheel. Using force beyond the ratings of the operator and/or using additive force devices such as
cheater bars, wheel wrenches, pipe wrenches, or other devices on the operator handwheel may
cause serious personal injury and/or damage to the operator and valve.
c WARNING: Do not exceed any design limitations or make modifications to this equipment
without first consulting Limitorque.
c WARNING: Use of the product must be suspended any time it fails to operate properly.
a CAUTION: If a motor actuator is driving the manual operator, do not operate the valve under
motor operation without first checking and setting the limit switch setting and checking for
correct motor rotation.
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a CAUTION: Do not use replacement parts that are not genuine Flowserve Limitorque parts, as
serious personal injury and/or damage to the operator and valve may result.
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