Flowserve Limitorque L120-190 - Table of Contents

3
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