Flowserve Limitorque L120-190 User manual

Experience In Motion
USER INSTRUCTIONS
Installation
Operation
Maintenance
Limitorque
®L120-190 through L120-2000
FCD LMENIM1203-01-A4 – 05/15

Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
flowserve.com
Contents
1 Introduction 5
1.1 Purpose 5
1.2 User Safety 5
2 Initial Inspection and Storage Instructions 6
2.1 Product Identification 7
2.2 Inspection and Recording 8
2.3 Short-Term Storage (less than 1 year) 8
3 Actuator Weights 10
4 Installation Instructions 11
4.1 Safety Precautions 11
4.2 Safety Practices 12
4.3 Actuator Preparation 12
4.3.1 Mounting Base 13
4.3.2 Stem Acceptance 13
4.4 Double Torque Switch 13
4.4.1 Setting Torque Switch 14
4.4.2 Balancing Torque Switch 15
4.4.3 Torque Switch Terminal Connections 15
4.5 Geared Limit Switch – Rotor Type 16
4.5.1 Setting Limit Switch 16
4.5.2 Combination of Contacts 19
4.6 Position Indication 19
4.6.1 Local Position Indication 19
4.6.2 Remote Position Indication 20
4.6.3 Calibrating Position Transmitter PT20SD 20
5 Operation 21
5.1 Electrical Start-Up 21
5.1.1 Typical Wiring Diagram 22
5.2 Manual Operation 22
5.3 Motor Operation 23
5.4 Torque and Travel Limiting 23
6 Maintenance 24
6.1 Lubrication 24
6.1.1 Lubrication Inspection 24
6.1.2 Factory Lubricant 25
7 Disassembly and Reassembly 26
7.1 L120-190, -420, and -800 26
7.1.1 To Replace Stem Nut Only 26
7.1.2 L120-190, 420, 800 Disassembly 27
7.1.3 Reassembling Actuator Sizes L120-190, -420 and -800 28
7.1.4 Gaskets 29
7.2 L120-2000 38
7.2.1 Drive 2 Disassembly (Thrust Housing Only) 38
7.2.2 Drive 1 Disassembly (Torque Housing) 38
7.2.3 Drive 1 (Torque Housing) Reassembly 40
7.2.4 Drive 2 (Thrust Housing Only) Reassembly 42
8 Standard Wiring Diagrams 49
9 Troubleshooting 52

Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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10 How to Order Parts 53
11 EC Declaration of Conformity 54
Figures
Figure 2.1 – L120-190 through 2000 8
Figure 4.1 – Double Torque Switch 13
Figure 4.2 – Setting Torque Switch 14
Figure 4.3 – Ring Tongue Terminal 15
Figure 4.4 – Geared Limit Switch 17
Figure 4.5 – Setting Geared Limit Switch 18
Figure 4.6 – Position Indicators 19
Figure 4.7 – Typical Connection for a 1000 ohm Potentiometer 20
Figure 7.1 – L120-190 and -420 Drive Sleeve Side View (Refer to Table 8.1 for parts list) 30
Figure 7.2 – L120-190 and -420 Worm Shaft Side View (Refer to Table 8.1 for parts list) 31
Figure 7.3 – L120-190 and -420 Top View (Refer to Table 8.1 for parts list) 32
Figure 7.4 – L120-800 Drive Sleeve Side View (Refer to Table 8.1 for parts list) 33
Figure 7.5 – L120-800 Worm Shaft Side View (Refer to Table 8.1 for parts list) 34
Figure 7.6 – L120-800 Top View (Refer to Table 8.1 for parts list) 35
Figure 7.7 – L120-2000 Drive Sleeve Side View (Torque Base) (Refer to Table 8.2 for parts list) 43
Figure 7.8 – L120-2000 Top View (Refer to Table 8.2 for parts list) 44
Figure 7.9 – L120-2000 Side View (Refer to Table 8.2 for parts list) 45
Figure 7.10 – L120-2000 Exploded View 46
Figure 8.1 – Wiring Diagram – No Controls 49
Figure 8.2 – Wiring Diagram – Integral Controls 50
Figure 8.3 – Wiring Diagram – NCU 51
Tables
Table 3.1 – Actuator Weights 10
Table 4.1 – Mounting Base Dimensions 13
Table 4.2 – Maximum Stem Acceptance 13
Table 4.3 – Terminal Dimensions By Cable Size 16
Table 4.4 – Maximum Drive Sleeve Turns 17
Table 6.1 – Lubricant Weights 25
Table 7.1 – L120-190, -420 and -800 typical parts list 36
Table 7.2 – L120-2000 typical parts list 47

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Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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1.1 Purpose
This Installation, Operation, and Maintenance Manual explains how to install and maintain L120-190
through -2000 actuators. Information on installation, disassembly, reassembly, lubrication, and 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. Work to be performed on the actuator should be
carried out by a qualified tradesman familiar with the operation and maintenance of electric actuators.
Failure to observe these precautions could result in serious bodily injury or death, damage to the
equipment, warranty void, or operational difficulty.
Safety notices are presented in this manual in three forms:
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 actuator’s installation and
operation.
1 Introduction

Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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L120 Series actuators operate without modification in any rising or non-rising stem application for
linear-action valves.
The actuators meet rigid safety requirements and are available in weatherproof, explosionproof, and
submersible configurations.
The actuators are compatible with a wide range of control options from stand-alone actuators with local
control stations to open standards-based DDC-100 networks with up to 250 actuators.
The actuators are designed with integral control packages including plug-in interconnect boards that
increase control functionality for stand-alone or networked actuators.
Torque overload protection is provided in both directions of travel.
2 Initial Inspection and
Storage Instructions

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Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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cWARNING: Read this Installation and Maintenance Manual carefully and completely before
attempting to store the actuator. Be aware of the electrical hazards.
2.1 Product Identification
The actuator nameplate is located on the back of the actuator opposite the limit switch controls
compartment. The nameplate contains the following information:
• Limitorque name
• Point of manufacture
• Actuator size
The motor nameplate is located on the motor. The nameplate contains the following information:
• ID number
• Run torque
• RPM
• Full load amps
• Insulation class
• Space heater size
• Service Factor
• Cycles
• Ambient temperature
• Start torque
• Order number
• Serial number
• Customer tagging
• Enclosure type
• Volts
• Locked rotor amps
• Duty
• Horsepower
• Phase
• Motor code
• Connection diagram

Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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Figure 2.1 – L120-190 through 2000
2.2 Inspection and Recording
Upon receipt of the actuator, inspect the condition of the equipment and record nameplate information.
1. Carefully remove actuator 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. Record the actuator nameplate information for future reference, i.e., ordering parts, obtaining
further information.
NOTE: The following are our recommended storage procedures to retain maximum product integrity
during short-term storage. Failure to comply with recommended procedures will void the warranty.
For longer-term storage, contact Limitorque for procedures and recommendations.
2.3 Short-Term Storage (less than 1 year)
Actuators are not weatherproof until properly installed on the valve or prepared for storage.
Store actuators in a clean, dry, protected warehouse away from excessive vibration and rapid tempera-
ture changes. If the actuators must be stored outside, they must be stored off the ground, high enough
to prevent them from being immersed in water or buried by snow.
Motor
Limit Switch
and Controls
Compartment
Housing
Declutch
Lever
Handwheel
Actuator Nameplate
(hidden)

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Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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1. Position the actuator in storage with motor and switch compartment horizontal.
2. Connect the space heaters (if supplied) or place desiccant in the switch compartment.
3. Connect space heaters if actuator is to be stored in a damp place.
4. Replace all plastic caps or plugs with pipe plugs and ensure that all covers are tight.
5. If the actuator is mounted on a valve and the stem protrudes from the actuator, a suitable stem
cover must be provided.

Limitorque®L120-190 through L120-2000 FCD LMENIM1203-01-A4 – 05/15
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The approximate L120 actuator weights are provided below:
Table 3.1 – Actuator Weights
Actuator Size Control Types Drive 1 Weight Side HW Drive 2 Weight Side HW
lb. kg lb. kg
L120-190
NCU3520 192 520 192
BIC3586 217 586 217
UEC/Clamshell3586 217 586 217
L120-420
NCU31065 394 1065 394
BIC31130 418 1130 418
UEC/Clamshell31220 451 1220 451
L120-800 NCU3127014711170026292
L120-2000 NCU32500192513300212212
Note 1: Torque Only
Note 2: Torque and Thrust
Note 3: NCU = No Controls Actuator
BIC = Basic Integral Controls
UEC = Universal Electronic Controller
3 Actuator Weights