Installation, Operation and Maintenance Manual
XXXXXXXX Rev. 1
July 2016
1
Section 1: Preface
Preface
Section 1: Preface
1.1
Purpose
Bettis Actuation Technologies is an Emerson Business Unit that specializes in the
manufacture of valve actuators and manual operators. Its manual actuation product range
consists of three series of valve operators as mentioned below:
•
Quarter-turn worm gear operators for manual valve operation (AT Series)
•
Quarter-turn worm gear operators for electrical actuation of valves (AT Series)
•
Quarter-turn worm gear manual overrides for pneumatic/hydraulic operation of
valves (mor series)
The AT Series is a selection of quarter turn worm gear operators for manually operated
valve systems. 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
through the hand wheel and worm shaft which in turn drives the worm wheel thereby
multiplying the torque transmitted from worm shaft to the valve stem which is connected
to the worm wheel.
The purpose of this IOM manual is to help the user of this equipment on the following:
•
Safety instructions
•
Installation of AT Series Gearboxes
•
Operation of AT Series Gearboxes
•
Maintenance of AT Series Gearboxes
Safety notices in this manual highlight the precautions the user must take in order to
avoid personal injury and damage to the equipment. The user must read this manual
before attempting to install the equipment or operate or carry out maintenance of the
equipment. Failure to follow the instructions mentioned in this manual could result in
serious personal injury, equipment damage, operational difficulty and voiding of the
warranty.
Emerson will not be responsible for any possible damage or physical injury resulting from
the use of their equipment other than the designed application or the lack of care taken
by the user during installation, operation or maintenance of the equipment. Such risks lie
entirely with the user.
