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Summary of Contents for Emerson AT Series
- Page 1 Installation, Operation and Maintenance Manual XXXXXX Rev. 1 July 2016 AT Series with Spur Quarter-Turn Gear Boxes...
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Page 3: Table Of Contents
Disassembly of Spur Gear Reduction Unit ............ 12 Dismantling of Worm Line Assembly ............13 Removal of Worm Wheel ................14 Reassembly of AT Series Gearbox ..............14 Section 8: Document Revision Appendix A: List of Figures Table of Contents... -
Page 4: Section 1: Preface
The AT Series gear operator is used to operate the valve manually with the help of a hand wheel. The AT Series gearbox is used to operate either a butterfly valve or a ball valve or a plug valve or used in damper applications or any 90-degree device. The torque is transmitted... -
Page 5: Section 2: About The At Series
The AT Series gearbox has one valve mounting face on the bottom side (either plain face or ribbed face depending on model) and the worm wheel of the gearbox has a bore to suit the valve stem directly or suit the coupling between valve stem and gearbox. - Page 6 Section 2: About the AT Series Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Figure 2 AT Series Exploded View Table 1. Component List Component Number Part Name Housing Housing Cover Gear Worm Bearing Spur Housing Spur Cover...
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Page 7: Xxxxxxxx Rev. 1 July
Installation, Operation and Maintenance Manual Section 2: About the AT Series XXXXXXXX Rev. 1 July 2016 Figure 3 AT Series Bottom View About the AT Series... -
Page 8: Section 3: Storage And Preinstallation
Also, check whether the data on the nameplate corresponds to the expected product data. If the AT Series gearbox is to be stored indoors for a brief period (less than 12 months), it should be ensured that the gearbox is kept in a dry place preferably on a wooden pallet and protected from dust. -
Page 9: Section 4: Installation
BRACKET MOUNTING – This involves installing the bracket on the valve flange. The AT Series Gearbox is mounted on the bracket and is coupled to the valve stem with a coupling. Following procedure should be followed while installation of AT Series gearboxes onto valve systems: The valve and gearbox should be in the same position i.e. -
Page 10: Section 5: At Series Gearbox Operation
Section 5: AT Series Gearbox Operation Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Section 5: AT Series Gearbox Operation Manual Use The gearbox is to be operated with a hand wheel which is supplied along with the gearbox. -
Page 11: Stopper Setting
Another View of Hand Wheel Rotation Stopper Setting There are two mechanical stoppers on all AT Series gearboxes to limit the stroke from ‘open’ to ‘close’. This stroke of 90° needs to be set correctly for all gearboxes as described below. - Page 12 Section 5: AT Series Gearbox Operation Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Figure 6 Stopper Bolt Location Stopper Bolt AT Series Gearbox Operation...
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Page 13: Section 6: Lubrication
Application The AT Series gearbox is grease lubricated. All AT Series gearboxes are supplied with EP-1 premium quality lithium soap based grease (NLGI grade 1) suitable for an ambient temperature of -20° to + 120° (in case of specialty greases, the temperature range could be different). -
Page 14: Section 7: Disassembly And Reassembly Instructions
Section 7: Disassembly and Reassembly Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Section 7: Disassembly and Reassembly Instructions Removal of Cover • Remove the cover by loosening the cover bolts with a spanner. • Each time the cover is removed, the gasket sealing is lost as it is a liquid sealant. Re-apply gasket sealant (Loctite no. -
Page 15: Disassembly Of Spur Gear Reduction Unit
Both spur pinions and spur gears can be removed with a circlip plier once the cover is removed. • Remove the spur gear unit casing by loosening the allen cap screws with which it is mounted on the main AT Series GB casing. Figure 9 Spur Housing Disassembled Disassembly and Reassembly... -
Page 16: Dismantling Of Worm Line Assembly
Section 7: Disassembly and Reassembly Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Dismantling of Worm Line Assembly • Loosen the grub screw and key / spring pin with which the worm is fixed to the input shaft. •... -
Page 17: Removal Of Worm Wheel
Figure 12 Removing the Worm Wheel Reassembly of AT Series Gearbox • In reassembly of the AT Series gearbox, follow all above steps in reverse order. • Be sure to lubricate all mating / rotating parts with grease • Ensure to provide a liquid sealant on both covers and housing... -
Page 18: Section 8: Document Revision
Section 8: Document Revision Installation, Operation and Maintenance Manual July 2016 XXXXXXXX Rev. 1 Section 8: Document Revision Table 2. Revision Overview DATE STATUS REVISION BY * DATE XXXXXX 6/16/2016 Completed Charles Rico 6/16/2016 * Signatures on file Bettis, Houston, Texas Document Revision... - Page 19 Installation, Operation and Maintenance Manual XXXXXXXX Rev. 1 July 2016 Appendix A: List of Figures Figure 1 AT Series General View ..................2 Figure 2 AT Series Exploded View ..................3 Figure 3 AT Series Bottom View ..................4 Figure 4 Hand Wheel Rotation ....................
- Page 21 Tianjin 301700 Holland Fasor 6 P. R. China Székesfehérvár 8000 The Emerson logo is a trademark and service mark of Emerson Electric Co. T +86 22 8212 3300 Hungary Bettis is a mark of one of the Emerson family of companies.
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