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Service Instructions
MAN-02-08-77-0714-EN Rev. 2
September 2020
Section 2: Installation
Installation
2.7.1 Approved Fluids
Standard Fluid [use with -20°F to 140°F (-29°C to 60°C) applications]
ConocoPhillips Megaflow™ AW HVI Hydraulic Oil 22
Shell Tellus S2 V 22
Mobil DTE 10 Excel™ 22
Low Temperature Fluid [use with -40°F to 140°F (-40°C to 60°C) applications]
Mobil Univis™ HVI 13
Although other brands of fluid matching the same specifications may be used, to maintain
the warranty and ensure trouble free operation, always check with the factory before
substituting any other fluid.
2.8
Accumulator (Optional)
2.8.1 Introduction
The Bettis SMART EHO Actuator may be equipped with an accumulator for modulating valve
control or to enable manual operation of the actuator if there is a loss of electrical power.
Accumulators always have the nitrogen pressure drained for shipping.
When using this procedure, refer to the Bettis SMART EHO Actuator General
Arrangement drawing and Hydraulic Schematic for the unit being worked on. Schematics
shown in this document are for illustration purposes only.
!
WARNING
This unit contains high-pressure hydraulic fluid and nitrogen gas. Exercise caution when
performing any type of maintenance. Wear proper safety attire and required personal
protective equipment, including safety glasses.
2.8.2 Accumulator Pre-charge
a.
Locate Isolation Valve (Nitrogen Blow Down and Fill) for the Customer
Nitrogen Fill Connection, called out on the General Arrangement Drawing
and Hydraulic Schematic (see illustration below).
b.
Close the Isolation Valve (Nitrogen Blow Down and Fill) and remove the
pipe plug from the adaptor.
NOTE:
The Adaptor is tapped with a 1/4-NPTF thread.