Operation
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GA03108_002_C1 - 04/2018 - © Leybold
4.3 Shutdown and Storage
We recommend to keep the RUVAC WS with a PFPE filling running even
during prolonged intervals (e. g. over night) with the intake line closed. This
can help to avoid corrosion during standstill.
Close the valve between the Roots pump and the vacuum system. First
switch off the Roots pump, then the backing pump.
After working with corrosive gases, the system should be vented with dry
protective gas (e.g. N2) to prevent corrosion during standstill.
When shutting down the pump and removing it from the system, it is
advisable to seal the connecting flanges tightly.
Before removing pump from the vacuum system, disconnect it from the
mains supply. Note any contamination affecting the pump.
Comply with all safety regulations. Observe safety informations 0.2.
Before removing the RUVAC WS PFPE from the system it must be purged
with nitrogen and sealed in a gas-tight manner.
Blow out the cooling water lines with compressed air. Avoid splashing water.
For transportation and storing of the pump, observe the information provided
in Section 2.
4.4 Changing from Vertical to Horizontal Flow
The RUVAC WS/WSUs are supplied as standard for vertical flow unless you
specifically request horizontal flow. Moreover, the pump may be converted
from one flow direction to the other.
For this proceed as follows:
Unscrew the oil drain plugs (5.1/2 and 5.1/4) and drain out the lubricant. Seal
off the bottom opening with the oil drain plug using a gasket which is in per-
fect condition so that a vacuum tight seal is attained again. Remove the feet,
turn the pump by 90° as shown in Fig. 1.5 (dimensional drawing) and mount
the feet for the new direction of flow.
The longitudinal axis of the pump must remain horizontal so that no residu-
al lubricant can flow from the side chambers into the pumping chamber.
Fill in lubricant (5.1/4); (see Section 3.1.1).
If a pressure switch has been installed, turn it so that it again points vertically
upwards.
The valve in the pressure balance line of the RUVAC WSU is designed to
work with both vertical and horizontal flow of the pump.
NOTICE
WARNING
NOTICE
