LEYBOLD 1019040V00, Руководство по эксплуатации

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During pumping, vapours may dissolve in the oil. This changes the oil
properties and thus there is a risk of corrosion in the pump. Therefore, do
not switch off the pump immediately after the completion of the process.
Instead, allow the pump to continue operating with the gas ballast valve
open and the intake line closed until the oil is free of condensed vapours.
We recommend operating the pump in this mode for about 30 minutes after
completion of the process.
For processes with a high proportion of condensable vapours, the intake line
must be opened slowly only after the pump has reached the operating
temperature.
One sign of condensation of vapours in the pump is a rise of the oil level
during the operation of the pump.
In cyclic operation, the pump must not be switched off during the intervals
between the individual working phases (power consumption is minimal when
the pump is operating at ultimate pressure) but must continue to run with
the gas ballast valve open and intake port closed (if possible via a valve).
Once all vapours have been pumped off from a process (for example, during
drying), the gas ballast valve can be closed to improve the attainable
ultimate pressure.
7.3.3 Operating temperature
CAUTION: HOT SURFACES
Risk of injury. There is the danger of receiving burns. Observe safety information
given in
Thermal hazards on page 9.
Proper operation of the pump is ensured in the ambient temperature range
between 10 °C to 40 °C (55 °F to 104 °F).
At operating temperature, the surface temperature of the pump can be
higher than 70 °C (156 °F).
If due to the ambient conditions this temperature range is to be exceeded at
either end of the range, contact us.
The motor may accelerate with a delay when simultaneously an
undervoltage is present at the motor and the pump is at the minimum
permissible and ambient temperature.
Under such operating conditions the motor protection switch may respond.
In this case, the motor may be started again.
7.3.4 Shut down
CAUTION: OPERATION SAFETY
Risk of damage to the equipment. When pumping condensable media let the pump
continue to operate with the gas ballast valve open and the intake line closed before
switching off (refer to
Pumping of condensable gases and vapours on page 36).
Under normal circumstances, switch off the pump. The intake port of the
pump contains an anti-suck back valve which closes the intake port when
the pump is shut down to prevent the pump oil from being sucked back into
the vacuum chamber. The function of the valve is not impaired by gas
ballasting. The anti-suck back valve is not a safety vacuum valve.
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300956027_002_A0 - 03/2022 - © Leybold
Operation