Installation, Operation and Maintenance Manual
VCIOM-15345-EN Rev. 1
February 2022
37
Operation
Section 6: Operation
Section 6:
Operation
After initial start-up and commissioning procedures have been accomplished, the
Biffi EHO Actuator provides a simple self-contained means of operation for a
quarter-turn valve. In case of a power failure, the actuator can be operated by the
use of the supplied handpump.
6.1
Hydraulic Power System
The Hydraulic System, powered by an electric motor, contains manifold based valves and
controls with minimal piping. The system will drive the actuator to the OPEN/CLOSE position
as selected by operation personnel.
6.2
Fluid Reservoir
The Biffi Self-contained, Electro-Hydraulic Actuator includes a fluid reservoir sized to
contain the hydraulic fluid required to operate the actuator cylinder and controls.
The standard unit has a sight gage to ensure presence of fluid and a dipstick measure
attached to the fill/breather cap to more accurately gauge the quantity of fluid contained.
6.3
Main Components and Options
NOTICE
Item numbers correspond to the Hydraulic Schematic Drawing.
—
(1) Biffi OLGA-H/OLGAS-H AND RPHD/RPHS-Series hydraulic
spring-return actuator.
—
(2) Electric motor.
—
(3) Hydraulic pump.
—
(4) Fluid Reservoir.
—
(5) 2-way Normally Close Solenoid Valve: Energized by the controller
when an operator pushes the local CLOSE button or when receiving a
remote discrete CLOSE signal.
—
(6) Redundant 2-way Normally Close Solenoid Valve: Energized by the
controller when an operator pushes the local CLOSE button or when
receiving a remote discrete CLOSE signal.
—
(7) Flow control valves: There are two flow control valves, with two
options: Adjustable speeds for slow close or fast close, or one adjustable
closing solenoid with an adjustable ESD solenoid.
