11
Service Instructions
MAN-02-08-77-0714-EN Rev. 2
September 2020
Section 1: Introduction
Introduction
Section 1: Introduction
1.1 Scope
This manual is offered as a guide to be used along with locally approved and safe practices
to install, operate, service and maintain the Bettis SMART EHO Actuator. Carefully follow
the instructions in this manual and make sure you install the actuator correctly and
according to your requirements.
1.2
General Information
1.2.1
Overview
The Bettis SMART EHO is a self-contained, quarter-turn, valve actuator that combines
proven technologies from Emerson’s Actuation Technologies. The actuator has been
designed for critical shutdown applications where reliability is crucial. The SMART EHO
utilizes a dependable double-acting actuator combined with an integral hydraulic power
pack and electronic control module.
The SMART EHO accepts a wide range of single-phase, three-phase or DC power sources.
A hydraulic hand pump can be used to stroke the actuator during commissioning or in the
event of an emergency power loss.
Electronic modules are contained within an explosion proof, IP68 enclosure and all
electronic components are isolated from the customer connection terminals.
The SMART EHO provides a compact design with actuator and control components that
have been field proven for decades in critical service applications.
The SMART EHO is designed for modulating ESD applications and comes with alert, alarm,
diagnostic, and self-calibration features.
1.2.2
Product Attribute
•
Easy installation – Bettis™ SMART EHO actuator is a totally self-contained system
and designed for compactness and adaptable to new or existing valves
•
Bettis™ G-Series hydraulic double-acting or double-acting fail-safe actuator
•
Shafer™ hydraulic control technology
•
EIM™ electronics and communication technology
•
Multiple input power options with either AC or DC
•
Local lockable Remote/Local/Offline selector switch
•
Local open/close selector knob
•
Partial stroke test
•
Fast speed of operation to fail-safe position if required
•
Emergency shutdown – independent safety circuits and solenoid valve
•
Dual sealed Separate Terminal Chamber, allows installation wiring to be performed
or fuses to be replaced without exposing control components to hostile
environmental conditions