Vacuubrand RZ 9 User Manual download pdf (Page 34)

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Notes on choosing the appropriate oil for the application

The standard oil for VACUUBRAND rotary vane pumps is the B-oil. This

is a mineral oil, which is used for the rst lling of the pump.

The advantages of the B-oil are: Flat viscosity curve, low vapor pressure,

good chemical resistance, extended stability when pumping oxidants,

acid or basic vapors compared to conventional mineral oils, and good

skin compatibility.

Certain pumped media may attack the conventional oil in the pump. Spe-

cial 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 sub-

stances. This is also mandatory if special oils are used.

Special oils:

Rotary vane pump oil K8

The rotary vane pump oil K8 is a special oil designed for pumping acid

vapors. The oil is very hygroscopic and has a limited capacity for acids.

With decreasing pH, the anticorrosive effect decreases as well, and it is

necessary to change the oil at appropriate intervals. When the pump will

stand still for prolonged periods (i.e., for several days), the oil must be

drained and the pump must be lled with mineral oil.

Synthetic oil (peruoropolyether oil, e.g., Fomblin

Synthetic oils have an excellent chemical resistance and are certied

for pumping pure oxygen. Therefore these oils are excellent for handling

strong oxidants, e.g., halogens, nitrogen oxides, etc.

Attention: As peruoropolyether oils mixed with mineral oils result in an

emulsion, pumps used with these oils must be absolutely free of any

residues of mineral oils. To accomplish this, you must completely disas-

semble and diligently clean the pump unit.

* reg. trade mark Montedison

Attention if using special oils: Due to a different viscosity / density com-

pared to the standard oil, pumps lled with special oil may not achieve

the specied ultimate pressure, or the pumps may not start reliably at

temperatures below 54°F (12°C).

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Vacuubrand RZ 9 User Manual Page 34