

SFPA
Electro-Hydraulic Actuator
The SFPA
electro-hydraulic system utilizes the Bettis hydraulic
actuator powered by an SFPA power unit and controls. Efficient
heavy-duty modular designed motor and pump convert electric
power to hydraulic power. Self-contained in a highly efficient
package with controls, provide the benefits of electric
actuators, but with advantages for fail-safe action, modulation
and high torques (from 3,000 - 6,000,000 lb. In. depending
on models).
The standard
¼ turn electro-hydraulic uses the Bettis E Series
actuator in either double acting or spring return. The
Bettis G Series - RoboArm II and HD Series ¼ turn
actuators as well as Bettis linear models also available
for electro-hydraulic operation. Motor and solenoid control
are available in 110/220VAC (60/50Hz 1/2/3 phase, or 24VDC)
All weather and UL/CSA Explosion Proof, NEMA 4 options.
Electric junction provides a single connecting point with
NEMA 4 or 7 enclosure options. Station panels are also
available with push-button local control and reset for
ESD or fail-safe applications. Modular field serviceable
motor & pumps.
Fail-Safe operation
is available in the event of power loss* with spring return
models using a mono-stable control valve. Options include
bi-stable control valve with DC battery-backup allowing
fail-safe operation independent of a power loss*. This
eliminates the need for large UPS (batteries). Manual
hydraulic pump is standard on all models. (AC or DC Operating
Electrical Power)*
The SFPA electro-hydraulic
actuator when fitted with the PMV-F5 feedback unit is
ideal for modulating or throttling applications. The control
of hydraulic fluid offers infinite stiffness and stability
for fast response
and positioning accuracy. F5 feedback unit provides options
for 4-20mA (potentiometer) or standard SPDT switch pack
(mechanical or proximity), and are Intrinsically safe
or Explosion proof option (UL CSA & FM).