Current And Preventive Maintenance; Oil Change - MIL'S EVISA E65.R Betriebs- Und Wartungshandbuch

In case of frequent starts:
The number of starts per hour must not exceed:

10 for models with motor power less than or equal to 2.2kW.

6 for models with motor power greater than 2.2kW.
If possible, leave the gas ballast open when the pump is switched off.
In case of a cyclic process (pumping time less than 2 minutes):
The pump must not be stopped between cycles but must be isolated from the chamber by a valve to allow
it to run in full vacuum. The pump's power consumption is very low when operating in full vacuum.
Make a purge of the pump with an inert gas between each change of different substances to
avoid cross-contamination that could cause unexpected reactions.
3.3.

Current and preventive maintenance

The period between overhauls depends on the process for which the pump is used and the assurance of
correct operation.
Do not disassemble the pump more than necessary during repair, service or maintenance operations.
Take every possible precaution to protect the environment. In particular, all waste fluids
should be recovered and recycled. Never dispose of these fluids directly into the
environment.
Recycle used oils, greases and filters through an organization approved by the country where
the equipment is used.
When carrying out maintenance and repair work, it is essential to avoid the risks associated
with moving or live parts.
Before performing any service or maintenance operation on the pump:

The pump must be switched off and electrically locked.

Wait until the oil temperature has cooled down to ambient temperature.

Isolate the pump from the application.
Depending on the application, parts and oil of the pump may have been contaminated by the
substances sucked in. Apply appropriate safety regulations and use suitable personal
protective equipment.
Personal protective equipment must be checked and used in accordance with its supplier's
specifications.
Special precautions should be taken when using fluorinated products which may have been
exposed to temperatures above 260° C.
These operations must be carried out by qualified and accredited personnel.
517976-05
EVISA ATEX E65.R / E100.R / E200.R / E300.R
Failure to comply with the manufacturer's recommendations and failure to use original parts
during maintenance operations will result in the cancellation of the warranty and/or release
the Mil's company from any liability.
During maintenance operations, following points must be take care:

Damage of parts during disassembling,

Risks related to intervention in high-risk areas: use of tools and methods adapted to avoid any
generation of hot spots,

Risks related to the presence of explosive fluid inside the pump: clean the pump with neutral gas
or air before use.
The recommended maintenance intervals and the use of original spare parts must be
observed in order to ensure that the methods of protection against hazards in potentially
explosive atmospheres are maintained.
The pump must be cleaned regularly in order to avoid deposits and accumulation of dust,
which can lead to electrostatic discharges and, above all, impair its operation.
Do not use inappropriate solvents but a damp cloth.
Particular attention must be paid to:

The cooler

The protective cover of the pump

The electric motor
Rubber O ring or rubber flat seals dismantled must be replaced.
Check the condition of the protective cover to ensure that no friction occurs or damage has
occurred.
3.3.1.

Oil change

Check the oil level regularly. Perform the first oil change after the first 500 hours of operation. At the same
time change the oil filter.
Then every 3000 hours or 24 months for synthetic MIL' S oil (MV99S).
Some pumping applications pollute the oil more than others. Only experience enables one to
determine the frequency of oil changes and the choice of oil quality to use. The frequencies
indicated below are usual encountered values.
Recommended oil: special vacuum pump MV99S.
General characteristics: anticorrosive, antioxidant, extreme pressure, antifoam, flash point: 250°C.
The use of oil, other than that recommended by MIL' S, engages your responsibility and/or
responsibility of your supplier. The use of unsuitable or immiscible oil can destroy the pump.
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