Limitorque LY Series - Product Capabilities and Features; Figure 2.1

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LMAIM1501 LY Installation and Maintenance for LY 1001, LY 2001 and LY 3001 2-1

2 Product Capabilities and Features

The LY actuator controls the opening and closing travel of the valve and limits torque through the torque switches provided. As a

result, all valve-operating parts are protected from overload, improper seating, and foreign obstructions.

LY actuators may be mounted on any size valve in almost any position or location.

Microprocessor-based control and monitoring devices are available for installation on your actuator. Contact your local

Limitorque distributor or Limitorque sales office for further information.

Figure 2.1 – LY Actuator (LY 1001 shown)

Flow Control Division

Limitorque Actuation Systems

Limitorque

100

Housing

Position Indication Window

Control Cover

Conduit Adapter

Declutch Lever

Handwheel typically

clockwise turn to CLOSE

and counterclockwise

turn to OPEN

Main Page

Table of Contents3
Introduction7
Purpose7
User Safety7
Product Capabilities and Features9
Figure 2.1 - LY Actuator9
Initial Inspection and Storage Instructions11
Product Identification11
Inspection and Recording11
Figure 3.1 - LY Nameplate11
Storage Procedures12
Short-Term Storage (Less than 1 Year)12
Long-Term Storage (1 to 5 Years)12
Unit Weights13
Table 4.1 - Unit Weights13
Installation Instructions15
Safety Precautions15
Initial Actuator Preparation15
Figure 5.1 - Torque Nut and Retaining Drive Ring Removal from an LY 100115
Installation Overview16
Figure 5.2 - LY Keyway Locations16
Table 5.1 - Torque Drive Nut Custom Bore and Keyway Sizes16
Figure 5.3 - LY 1001, 2001, and 3001 Torque Drive Nut Orientation17
Figure 5.4 - Removing Control Cover and Conduit Pipe Plugs18
Table 5.2 - LY Actuator/Mounting Base Tap Sizes18
Figure 5.5 - Grounding Lug Location19
Table 5.3 - Control Cover and Conduit Pipe Plug Hardware19
Table 5.4 - LY Control Cover and Integral Control Cover Bolt Sizes19
Torque Switch Settings20
Rewiring the Torque Switch for Non-Standard Drive Sleeve Rotation20
Figure 5.6 - Reversing Torque Switch Wiring20
Limit Switch and Mechanical Stop Settings21
Setting the Limit Switches21
Setting the CLOSED Limit Switch21
Figure 5.7 - Limit Switch Setting Nut22
Figure 5.8 - Setting CLOSE Limit Cam22
Setting the OPEN Limit Switch23
Figure 5.9 - Setting OPEN Limit Cam23
Mechanical Stops24
Setting the CLOSED Mechanical Stop on the LY 100124
Table 5.5 - Mechanical Stop Set Screws24
Setting the CLOSED Mechanical Stop on the LY 2001/300125
Table 5.6 - Mechanical Stop and Locknut Screw Sizes25
Setting the OPEN Mechanical Stop on the LY 100126
Setting the OPEN Mechanical Stop on the LY 2001/300126
Setting the MDPI (Mechanical Dial Position Indicator)26
Setting the Potentiometer27
Figure 5.13 - Potentiometer Calibration Components28
Operation29
Typical LY 1001 Operation29
Verify Correct Motor Rotation (Phasing) and OPEN/CLOSE Pushbutton Operation6-129
Three-Phase Motor29
Figure 6.1 - Standard Actuator/Three-Phase30
Figure 6.2 - Three-Phase with Control Package31
Single-Phase Motor32
Figure 6.3 - Standard Actuator/Single-Phase33
Figure 6.4 - Single-Phase with Control Package34
DC Motor35
Electrical Startup35
Manual Operation35
Motor Operation36
Figure 6.5 - LY 1001 Cover and Associated Parts36
Figure 6.6 - LY 1001 Top Plate and Associated Parts37
Figure 6.7 - LY 1001 Housing and Associated Parts38
Figure 6.8 - LY 2001/3001 Cover and Associated Parts39
Figure 6.9 - LY 2001/3001 Top Plate and Associated Parts40
Figure 6.10 - LY 2001/3001 Housing and Associated Parts41
Maintenance43
Lubrication43
Lubrication Inspection43
Factory Lubricant43
Minimum Lubricant Qualities Required43
Disassembly and Reassembly44
LY 1001 Disassembly44
LY 1001 Reassembly45
LY 2001/3001 Disassembly47
LY 2001/3001 Reassembly49
Troubleshooting51
Parts Lists55
Table 8.1 - LY 1001 Parts List55
Table 8.2 - LY 2001/3001 Parts List56
How to Order Parts59
Regulatory Information61

Limitorque LY Series - Product Capabilities and Features; Figure 2.1 - LY Actuator

Table of Contents