CONFIGURATION: CONTROLS
Electric Displacement Control
Electric Displacement Controls are available that
provide pump output flow (displacement) in either
direction that is approximately proportional to an
electrical input signal.
The Electric Displacement Control is available with a
pressure override feature.
The control does not include the system necessary for
providing the input signal. Sundstrand does not
manufacture
this
control,
but
works
with
the
manufacturer to provide this option.
Manual Variable Pressure Control
The Variable Pressure Control is designed to provide a
differential system pressure that is approximately
proportional to the angular movement of the control
handle. This control can be used for high inertia loads.
Pressure is used to start the load moving (control handle
rotated in one direction), then shut off (handle to neutral)
allowing the load to coast. Applying pressure against
the load (control handle rotated in opposite direction )
will stop the load. The control will return to neutral if the
control handle is released. The internal centering
spring is not sufficient to overcome external control
linkage friction.
CAUTION
Torque on the control handle shaft must not exceed 150
in. lbs.
Hydraulic Variable Pressure Control
The Hydraulic Variable Pressure Control is designed to
operate in a similar manner to the manually operated
Variable Pressure Control except that the system
pressure is proportional to a hydraulic command signal.
This allows for remote machine control from a hydraulic
source and eliminates mechanical linkage.
Torque (pressure) is used to start the load moving and
the load is then allowed to continue movement due to its
own inertia. Applying pressure in the opposite direction
will stop the load.
The control is available in five different command signal
ranges with all five versions being field adjustable to
5000 psi maximum system pressure.
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