Limitorque L120 Series Installation & Maintenance
  1. Manuals
  2. Brands
  3. Limitorque Manuals
  4. Controller
  5. L120 Series
  6. Installation & maintenance

Limitorque L120 Series Installation & Maintenance

Hide thumbs
Table of Contents

Advertisement

Quick Links

L120 Series
Installation & Maintenance
120-11000 Rev A
August 1998

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the L120 Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Limitorque L120 Series

Summary of Contents for Limitorque L120 Series

  • Page 1 L120 Series Installation & Maintenance 120-11000 Rev A August 1998...
  • Page 2 L120 Series Installation & Maintenance...
  • Page 3 If there is any doubt as to exact installation, configuration, and/or use, call Limitorque Corporation‚ at (804) 528-4400. The latest revisions to this document are available online at http://www.limitorque.com...

  • Page 4: Table Of Contents

    WTR Series Contents Table of Contents Introduction Purpose User Safety Product Capabilities and Features Initial Inspection and Storage Instructions Product Identification Inspection and Recording Storage Procedures Short Term Storage (less than 1 year) Unit Weights Installation and Instructions Safety Precautions Safety Practices Prepare Initial Actuator Mounting Base...
  • Page 5 WTR Series Contents / Figures / Tables Reassembly Declutch Assembly (L120-10) Declutch Assembly (L120-20/40) Install the Motor How to Order Parts Figures Figure 1 – L120-10 through 40 Figure 2 – Micro-Switch Style Torque Switch and 600 Volt Torque Switch Figure 3 –...

  • Page 6: Introduction

    NOTE: Highlights information critical to the user’s understanding of the actuator’s installation and operation. Product Capabilities and Features in any rising or non-rising stem applica- L120 Series actuators operate without modification tion for linear action valves. The actuators are available in weatherproof, The actuators meet rigid safety requirements.

  • Page 7: Product Identification

    WTR Series Product Capabilities and Features Product Identification The actuator unit nameplate is located on the back of the unit opposite the limit switch compartment. The nameplate contains the following information: Limitorque name • Point of Manufacture • Unit Size •...

  • Page 8: Inspection And Recording

    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. Short-Term Storage (less than 1 year) Units are not weatherproof until properly installed on the valve or prepared for storage.

  • Page 9: Installation And Instructions

    Installation Instructions Safety Precautions a WARNING: Read this Installation and Maintenance Manual carefully and completely before attempting to install, operate, or troubleshoot the Limitorque L120 actuator. a WARNING: Be aware of electrical hazards. Turn off incoming power before working on the actuator and before opening switch compartment.

  • Page 10: Stem Acceptance

    CAUTION: A maximum stop setting plate is provided on most units. Do not remove this plate. Do not exceed the setting indicated by this plate without contacting Limitorque. • Installing or adjusting the torque switch with the operator on a loaded condition will result in a loss of torque protection.

  • Page 11: Balancing Torque Switch

    WTR Series Installation Instructions Figure 2 – Micro-Switch Style Torque Switch and 600 Volt Torque Switch Maximum Stop Maximum Stop Setting Plate Setting Plate Balancing Balancing Screws Screws Mounting Mounting Index Marks Index Marks Screw Screw Micro-Switch Style Torque Switch 600 Volt Torque Switch Balancing Torque Switch Item letters correspond to Figure 2.

  • Page 12: Geared Limit Switch

    WTR Series Installation Instructions Geared Limit Switch CAUTION: The geared limit switch is not preset at the factory and must be adjusted after the actuator has been mounted on associated equipment. • Disconnect all incoming power to the actuator prior to opening the limit switch compartment and adjusting the switch.

  • Page 13: Setting Procedure

    WTR Series Installation Instructions Setting Procedure 1. Open the Compartment Cover (piece #200 of Figure 9). 2. Put the actuator into manual operation. Use the handwheel to operate the valve in the “open” direction. While operating the valve, note the direction of the Intermediate Shaft (B) corresponding to the rotor or rotors to be set.

  • Page 14: Combination Of Contacts

    WTR Series Installation Instructions Combination of Contacts The rotor segments can be separated and rotated through 90 degrees to give various combinations of normally open or normally closed contacts to each rotor. 1. Remove Nuts (piece #8) and Fillister Head Machine Screws (piece #5, for a total of 2 fasteners on each side of the switch).

  • Page 15: Figure 5 - 1000 Ohm Potentiometer

    WTR Series Installation Instructions To Calibrate Position Transmitter PT20SD 1. Position the actuator to mid-travel; valve at 50% position. 2. Disconnect the potentiometer wiring harness from the PT20SD board and measure the resistance from each end connection to the center connection on the potentiometer. 3.

  • Page 16: Optional Side-Mounted Handwheel

    WTR Series Installation Instructions Optional Sided-Mounted Handwheel For unit sizes L120-10, 20, and 40, the handwheel can be mounted on the side as shown in the following figures. Figure 6 – L120-10 parts list, attachment ratio 4.2:1 182-2 179 178 181 180 182-1 182-3 Piece...

  • Page 17: Figure 7 - L120-20 Dimensions And Parts

    WTR Series Installation Instructions Figure 7 – L120-20 with side-mounted handwheel and parts list, attachment ratio 5.7:1 & 182-2 178 181 180 182-1 182-3 157-5 Piece Quantity Description 157-3 Housing Cover Shim & 157-4 42-11 O - Ring 157-1 Quad Ring &...

  • Page 18: Figure 8 - L120-40 Dimensions And Parts

    WTR Series Installation Instructions Figure 8 – L120-40 with side-mounted handwheel and parts list, attachment ratio 12:1 182-2 & 178 181 180 182-1 Piece Quantity Description 182-3 Housing Cover Shim 42-11 O - Ring Quad Ring 157-3 Pipe Plug & 158-1 157-4 Bevel Housing Cover...

  • Page 19: Operation

    WTR Series Operation Operation a WARNING: Do not manually operate the actuator with devices other than installed Handwheel and Declutch Lever. Using force beyond the ratings of the unit and/or using additive force devices 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 or valve.

  • Page 20: Figure 9 - L120-10 Through 40 Typical Wiring Diagram

    WTR Series Operation Figure 9 (one of two) – L120-10 through 40 typical wiring diagram GREEN/WHITE GREEN/WHITE MOTOR ALTERNATE TRANSFORMER TYPES 230V H1 AND H3 TO L1 H2 AND H4 115V TO L2 WHITE BLACK FUSE BLACK (7C) WHITE BLACK GREEN (3C) BLACK...
  • Page 21 WTR Series Operation Figure 9 (two of two) – L120-10 through 40 typical wiring diagram MOTOR REVERSING STARTER TH.OL GRN/WHT MTR HTR (NOTE#3) PRIMARY ELEC YEL/WHT SECONDARY BLU/WHT MOTOR GROUND LUG FUSE SW323 PUSHBUTTON STATION OPEN BLU/RED FOR SIGNAL (18C) CONVERTER USE (18) BLK/WHT...

  • Page 22: Manual Operation

    WTR Series Operation Manual Operation Piece numbers refer to Figure 10. Counterclockwise rotation of the Declutch Lever (piece #9) causes the declutch actuator to lift the clutch sleeve out of engagement with the worm gear. Drive lugs on top of the clutch sleeve engage matching lugs in the Handwheel Adapter (piece #26) and then latches engage the clutch sleeve in this position.
  • Page 23 WTR Series Operation Figure 10 (two of two) – L120-10 through 40 parts breakdown Piece Quantity Description Piece Quantity Description Housing Flexloc Nut Motor Adapter Motor Pinion Electrical Compartment Seal Retainer Stop Nut Worm Shaft End Cap Washer HSG. Cover Shim Set Seals Kit Declutch Shaft Assy.

  • Page 24: Motor Operation

    Maintenance Lubrication The L120 series actuators have a totally sealed gear case, factory lubricated with grease. The gear case can be mounted in any position. However, those mounting positions that would result in the operator area being saturated with lubricant if the seal fails should be avoided and are not recommended.

  • Page 25: Factory Lubricant

    20% of the total lubricant. Factory Lubricant Gear Case: The L120 series actuator gear case is factory-lubricated with Exxon Nebula EP-0 calcium complex base grease, suitable for temperatures from -20°F (-29°C) to +150°F (+79°C).

  • Page 26: Disassemble And Reassemble

    WTR Series Maintenance Disassemble and Reassemble CAUTION: Turn off all power services before attempting to perform service on the actuator. • Remove the actuator from the valve for complex work. Minor work, such as replacing geared limit switch, torque switch or motor, may be readily performed while the actuator is still on the valve.

  • Page 27: Drive Sleeve And Housing Cover Disassembly

    Cover (piece #27) by removing Retaining Ring (piece #28). Torque Nut Disassembly (Drive 1 Option) For applications requiring torque only, the L120 series actuator can be supplied without the thrust base option. The torque nut is driven by the drive sleeve lugs and held in place by the torque bushing connector.

  • Page 28: Thrust Base Disassembly (Drive 2 Option)

    WTR Series Maintenance Optional Drive Sleeve 1. Remove the Handwheel (piece #29 of Figure 9), Handwheel Cover Plate (piece #33 of Figure 9) and Gasket (piece #34) to provide access to the Elastic Stop Nut (piece #99). 2. Remove the Elastic Stop Nut (piece #99) from the Rod (piece #1). The Torque Nut (piece #95) can now be removed from the bottom of the Drive Sleeve (piece #25 of Figure 9).

  • Page 29: Stem Nut Replacement - Thrust Base Applications

    WTR Series Maintenance Stem Nut Replacement - Thrust Base Applications This section is only applicable to thrust base applications. Occasionally the operator stem nut may need replacing if used in a threaded stem application on rising stem valves. a WARNING: Possible Hazardous Voltage. Turn power OFF before disassembling or removing the actuator from the mounting base.

  • Page 30: Declutch Assembly (L120-10)

    WTR Series Maintenance Figure 13 – L120-10 through 40 declutch assembly parts breakdown Declutch Stop & Declutch Stop & L120-20/40 L120-10 Piece Quantity Description Declutch Shaft Assembly L120-20/40 Declutch Shaft Assembly Declutch Actuator Declutch Actuator 7-2 & 7-3 1 Declutch Latch (left & right) Declutch Return Spring Handwheel Declutch Lever...

  • Page 31: Declutch Assembly (L120-20/40)

    3. Replace the compartment cover, handwheel adapter, handwheel and thrust base, if applicable, to complete the assembly. How to Order Parts To order parts or obtain further information about your Limitorque L120 valve actuators, contact your local Limitorque distributor sales office, or: Limitorque Corporation 5114 Woodall Road P.O.
  • Page 32 WTR Series...
  • Page 33 WTR Series...
  • Page 34 WTR Series...
  • Page 35 Australian Distributor for Limitorque Acrodyne Pty Ltd 14/11 Havelock Road Bayswater, Victoria 3153 Australia Phone 03-8727-7800 Fax 03-9729-8699...

This manual is also suitable for:

L120-10L120-20L120-40

Table of Contents

Save PDF