Ulvac VS1501, Инструкция по эксплуатации

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SK00-4390-DI-002-11
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5.3 Required Motive Energy
Motive energy to drive the Vacuum pump is a total value of the work of the mechanical element
on the rotary friction (mechanical work) and the work of compressing the air (compression work)
that becomes maximum when the suction pressure is between 3×10
4 ~ 4×10 4 Pa.
If the pressure went down under 10Pa, the compression work becomes smaller, then most of
the motive energy shall be spent on the mechanical work.
General use of the Pump shall indicate the largest load pressure range while the suction
pressure was between 3×10
4 ~ 4×10 4 Pa. Operation opening the Gas ballast port would require
larger motive energy at all the time as its compression work is large even the suction pressure
was small. Further, when the temperature of the Pump site was low (in cold district or outdoor
installation) starting the Pump would require larger motive energy since the Pump oil
temperature was low and its viscosity is higher. However the motive energy value shall decrease
and come stable as the oil viscosity comes lower while the Pump temperature shall rise as it
goes through operation.
IMPORTANT
For VS1501, the motor output may exceed its capacity during operation
at above 30kpa.
In such case, please refrain from continuous operation or adjust the flow
volume, in order to prevent burn out or other defects.
IMPORTANT
For VS2401, the motor output may exceed its capacity during operation at
above 20kpa.
In such case, please refrain from continuous operation or adjust the flow
volume, in order to prevent burn out or other defects.