Special oils – VACUUBRAND RZ 8 User Manual
Page 14
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. Manual-no.: 99 90 77 / 17/04/2008
page 14 of 20
Notes on choosing the correct oil for the application
The standard oil for rotary vane pumps is the B-oil, a mineral oil, which is used for the first filling of the
pump.
The advantages of the B-oil are: Flat viscosity curve, low vapour pressure, good chemical resistance,
extended stability when pumping oxidants, acid or basic vapours than conventional mineral oils und good
skin compatibility.
Certain pumped media may attack the conventional oil in the pump. Special oils can be used preventively.
It is at the users´ responsibility to check if the materials of the wetted parts are resistant against the
pumped substances. This is also important if special oils are used.
Special oils
Rotary vane pump oil K 8
The rotary vane pump K 8 oil is a special oil designed for pumping acid vapours. The oil is very hygroscopic
and has a limited capacity for acids. With decreasing pH, the anticorrosive effect also decreases and it is
necessary to change the oil at appropriate intervals. When the pump will stand still for prolonged periods,
the oil must be drained and the pump must be filled with mineral oil.
Silicone oil SI 2
Silicone oil SI 2 is used for rotary vane pumps when high aging stability is required.
Because of its chemical nature, the oil is resistant against many aggressive gases, particularly chlorine
and hydrochloric acid, solvent vapours and acid or basic solvents.
Synthetic oil (perfluoropolyether oil, e. g. Fomblin
®
*)
Synthetic oils have an excellent chemical resistance and are certified for pumping pure oxygen. Therefore
these oils are excellent for handling strong oxidants, e. g. halogens, nitrogen oxides, etc.
Attention: As perfluoropolyether oils mixed with mineral oils result in an emulsion, pumps used with these
oils must be absolutely free of any mineral oil residues.
* reg. trade mark Montedison
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Set of seals RE/RZ 2/5 .............................................................................................................. 63 91 45
Set of seals RE/RZ 8/16 ............................................................................................................ 61 12 10