LEYBOLD SOGEVAC SV10B, Original Operating Instructions

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300270017_002_C0 - 11/2016 - © Leybold
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1 Description
SOGEVAC
®
pumps are designed for pumping of inert gases in the range of rough
vacuum, between atmospheric pressure and ultimate pressure of the pump.
When pumping condensable vapours, a gas ballast valve must be installed.
1.1 Principle of operation
The SOGEVAC
®
pumps SV10-16 B are single stage oil sealed rotary vane vacu-
um pumps.
The rotor, having three slots in which the vanes are sliding, is eccentrically in-
stalled in a pump cylinder (stator). The vanes separate the interior space into 3
chambers. The volume of these chambers varies with the rotation of the rotor.
The gas sucked into the inlet chamber is compressed and then pushed out at the
exhaust valve.
The oil injected in the inlet chamber guarantees the air-tightness, the lubrication
and cooling of the pump. It is dragged off by the compressed gases and roughly
separated by gravity when entering in the oil sump. A fine separation is then oper-
ated in the exhaust filter. The proportion of oil in the exhaust gas is thus reduced
below the visibility threshold (over 99% entrapment rate). The collected oil is flow-
ing back to the generator through an internal transfer. A non-return valve is in-
cluded in the oil return screw system to avoid an oil flow from the generator to the
oil casing when the pump works at inlet pressures greater than 150mbar. There-
fore, continuous operation above 150mbar is not recommended and can lead to
oil spilling from the exhaust.
Specific P/N for high inlet pressure duty are available. Please contact us.
Depending on catalog numbers, the pumps are equipped with a permanent gas
ballast for pumping condensable vapours.
The anti suck back valve at the inlet flange avoids oil coming back into the inlet
line when the pump is stopped.
Nevertheless, this is not a safety valve and correct operation is granted only if the
anti suck back valve is clean and in good condition.
Description