LEYBOLD 970100V, Original Instruction Manual

Page: 35 / 51

SV Neo D 16 – 25 - 40 – 65 Jan. 2018 35 / 51
4.2 Shutdown
Under normal circumstances, all that you need do is to switch off the pump.
The intake port of the SOGEVAC
®
contains an anti-suck back valve, which
closes the intake port when the pump is shut down, to avoid the pump oil being
sucked back into the vacuum chamber. The valve's functioning is not impaired
by gas ballasting. The anti-suck back valve is not a safety vacuum valve.
When pumping condensable media, let the pump continue to operate with the
gas ballast valve open and the intake line closed before switching off.
If the pump is to be shut down for an extended period or if the pump has to be
stored, proceed as follows: When pumping harmful substances, take adequate
safety precautions.
Drain the oil (see Section 5.4).
Pour in clean oil up to the bottom edge of the oil-level glass (see Section 5.4)
and let the pump run for a few minutes.
Then drain the oil and pour in clean oil up to the top edge of the oil-level glass
(see Section 5.4).
Seal the connection ports. Special preservation or flushing oils are not
necessary.
When the pump has been switched off due to over-heating, initiated by the
motor or its protection, the pump must be cooled down to the ambient
temperature and must only be switched on again manually after having
eliminated the cause.
In order to prevent the pump from running up unexpectedly after a mains
power failure, the pump must be integrated into the control system in such a
way that the pump can only be started by a manually operated switch. This
applies equally to emergency cut-off switches.
In case of switching processes in connection with a pump which has warmed
up under operating conditions, the pump must then not be directly switched on
again.
Warning
Warning
4.3 Ultimate pump pressure
If the system cannot produce the pressures specified in the technical date,
measure the ultimate pressure directly at the pump's intake port after
disconnecting the pump from the system. The ultimate pressure of non-
condensable gases (partial pressure of air) can only be measured with a
compression vacuum gauge or a partial pressure gauge. Precise
measurements can only be obtained with calibrated instruments.
Upon initial start-up, after prolonged idle periods or after an oil change, it takes
a while until the pump reaches the specified ultimate pressure. The pump has
to attain its operating temperature, and the pump oil has to be degassed. We
recommend operating the pump initially with the gas ballast valve open.
The ultimate pressure depends on the pump temperature and the pump oil
used. The best ultimate pressures can be obtained at a low pump temperature
and by using the recommended oil types.
4.4 Taking out of use
Please contact Leybold for all relation question about the disposal of spares, consumables or the
entire pump
Operation