Description
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300407956_002_C1 - 01/2017 - © Leybold
1 Description
1.1 Pump Module
Members of the LEYVAC vacuum pump family are of the dry compressing
single stage screw vacuum pump type. All LV models are positive displace-
ment rotary pumps. During operating, the pump rotors are not in contact to
each other; therefore, there is no need of grease for lubricating or for sealing
the vacuum chamber. Thus, concerns in respect to oil dust backflows are not
applicable.
The pumps are water cooled and they are lubricated with PFPE (LVO 410) or
synthetic oil (LVO 210). Their purge gas system is equipped with a
24V-operated magnetic valve for both rotor purge and shaft seal purge, with
an additional manually operated valve fitted to the rotor purge line. There are
three different model types to be distinguished: The uncovered LEYVACs, the
C-type pumps with a cover installed, and the CC-type, equipped with covers
and an additional controller box.
Fig. 1.1
LEYVAC LV 80; LEYVAC LV 140 and LV 250 similar
