Installation
15
5.5 Filling up the operating fluid
The type and amount of operating fluid should be visible on the pump's rating plate for
every rotary vane pump.
The delivery consignment for the
standard pump
contains sufficient operating fluid for
one filling. Pumps for special applications (e.g. for pumping corrosive gases) can be op-
erated with other operating fluids. These must be defined in accordance with Pfeiffer
Vacuum specifications before initial assembly and ordered separately.
Permissible operating fluids
●
P3 (Standard operating fluid)
●
F4 (Operating fluid for corrosive gas versions)
●
D1 (for special applications and higher operating temperature)
– Final pressure of measurement, depending on the type of gas: < 5
·
10
-2
hPa
Filling up the operat-
ing fluid
Unscrew operating fluid filler screw 198.
Fill up operating fluid.
– Correct filling level during operations: within the markings at the sight glass frame.
Fig. 9:
Filling up the operating fluid
Screw in operating fluid filler screw 198.
Check operating fluid level only when the pump is warm and running; close
– vacuum flange and gas ballast valve to do so,
– Check operating fluid daily in non-stop operation, otherwise whenever the pump is
switched on. Refilling is possible when the pump is in final vacuum operation.
NOTICE
Use approved operating fluids only!
The use of operating fluids that have not been approved by Pfeiffer Vacuum shall result
in a limited warranty. In such cases, it is not possible to guarantee that product-specific
performance data will be achieved.
Prior consultation is required before using other application-specific operating fluids.
m ax.
m in.
198
WARNING
Toxic vapours!
Danger of poisoning when igniting and heating synthetic operating fluids (e.g. F4/F5)
above 300°C.
Observe the application instructions.
Do not allow operating fluid to make contact with tobacco products; observe safety
precautions when handling chemicals.
