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Q:
What do the model codes mean?
A: For example in the code 1.6-210: 1.6 Calls out the full load
flow in Liters per minute and 210 refers to the maximum pressure
in bar of the pump motor combination. The charts in the catalog
have these numbers converted into GPM and PSI.
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Q:
Are the stated flows in the catalog at
0 PSI?
A: The flows stated in a catalog for a given pump motor combination
are at full load pressure for that combination. The pressure
setting of the relief valve will effect the actual usable flow
as the working pressure gets closer to the pressure relief valve
setting.
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Q:
Can the motors run at 50 Hz?
A: In most cases yes. Please call the factotry with your voltage
and phase requirements if not shown in the catalog.
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Q:
What does Short Term/Intermittent Duty
Mean?
A: Our units can be run at full load for 5 consecutive minutes
before it will reach the thermal limit of 176 degrees F - at
this point the unit must cool to ambient temperature before
another full 5 minute cycle can be run. Or the units can be
run at full load intermittently on a 10% motor on, 90% motor
off work cycle. If the units are run below the maximum pressure
the time and percentage of on time may be increased - but will
not be able to run continuous without cooling.
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Q:
Does this mean the components are rated
for intermittent duty?
A: All individual components in the system are rated for continuous
duty. Heat is the limiting factor. If the unit's motor, and
therefore the oil, can be kept under 140 degrees F the units
can be run continuously. This can be accomplished with a cooler
or with a larger reservoir.
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Q:
What is the P option for?
A: Single phase motors do not have the starting torque to restart
under the full load pressure. The P option is required for single
phase only. With this option the pump is unloaded between work
cycles so it can restart unloaded – even though pressure
is still held in the system with valves.
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Q:
Why do single phase motors ship with capacitors?
A: Our single phase motors requires capacitors for start and
run. The capacitor is an energy storage device that unloads
when the motor requires the extra energy to start or continue
running. A capacitor is the electrical equivalent to a hydraulic
accumulator.
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Q:
We have just installed a new Hydac power
unit and it seems to be running very hot.
A: This is a common occurrence during a new installation/setup
on a machine. As the installation process is worked through,
the motor has most likely been running for much longer times
or more frequent cycles than what the machine's normal working
cycle will be. This happens because relief valves are being
adjusted, flow controls may need adjustment, and even curiosity
with a new piece of equipment can cause the run time to be longer
than what the actual everyday work cycle will be. After installation,
run a simulation of the actual application to see if heat is
still a problem
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Q:
My application requires more usable oil
volume. Do you have a larger tank than what is shown in the
catalog?
A: We do a have larger tanks available that are not yet in the
published or electronic literature. Please call for information
on these tanks. An alternative is to purchase a power unit without
a tank for installation into your reservoir.
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Q:
Is there a DC motor Option with the CA
or HP Series Power Units?
A: No, These unit have AC motors only.
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