VACUUBRAND RC 5 - Manual (Page 15)

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 78 31 / 20/12/2006
page 15 of 28
Oil change:
➨ Heat pump to operating temperature before changing oil.
➨ Isolate the pump from the electrical supply and admit air.
☞ Choose suitable pad, oil may drop.
➨ Remove oil drain plug below the rating plate, note O-ring.
➨ Tilt pump and catch oil in a suitable container.
☞ Dispose of the used oil according to the regulations.
➨ Reassemble oil drain plug with O-ring.
➨ To flush the pump, pour in fresh oil (approx. 50 ml) through the pump inlet.
➨ Operate the pump briefly, drain flushing oil and repeat flushing procedure if neces-
sary.
➨ Remove oil filler plug.
➨ Fill in fresh oil through the oil inlet port (only approx. 400 ml) bringing the oil level
approx. to ”min.” mark.
➨ Reinstall the oil filler plug and with inlet line closed, operate the pump for approx.
5-10 minutes.
➨ Add approx. 100 ml of oil. As a rule, it is not necessary to use the maximum quan-
tity of oil.
Do not overfill!
➨ Close oil filler plug.
Note: The oil degasses and foams if the inlet pressure is low. This is a desirable
condition which helps to protect the pump against corrosion and to prolong the work-
ing life of the oil.
The quantity, condition and quality of the pump oil have a decisive effect on the pump’s
performance and dependability.
Important: It may not be possible to reach the specified ultimate vacuum if an oil other
than VACUUBRAND B is used. Similarly, failure to use the recommended oil may
impair cold-start performance and pump lubrication. Notes on choosing the correct oil
for the application
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 and 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.