Installation Site - MIL'S EVISA Serie Manual De Utilización

1. OPERATING PRINCIPLE AND GENERAL INFORMATION
1.1. Description
The E-type pumps in the EVISA series are lubricated-vane vacuum pumps.
(*) only for E200/E300 vacuum pumps
The gas is sucked in through the suction filter (optional), the protective screen and the built-in valve, to fill the
inlet section of the pump (1). The centrifugal force resulting from rotation of the rotor forces the vanes against
the inner wall of the pump body, thereby forming three chambers leading to a succession of variable volumes
that create a vacuum and flow.
(1) suction / start of filling (2) maximum filling volume
During phase (1), oil is injected for lubrication, sealing and cooling purposes. It can either be injected directly or
passed through an oil filter prior to injection. The gas / oil mixture is delivered from the body through the
exhaust valve to the exhaust unit where a first gas / oil separation takes place. Oil is removed from the gas by
coalescence in the separating filter, then the gas discharged outside the pump. An automatic drain with float re-
injects the oil separated by the separating cartridge into the body of the pump.
When the pump is stopped, the suction valve prevents the entry of air and transfer of oil to the system under
vacuum. Bypassing of the exhaust valve enables the body to be brought to atmospheric pressure to avoid oil
accumulating in the body and thereby prevent irregular oil injection at start-up.
An GAS BALLAST (optional) prevents the condensation of water vapour in the pump in the event of reduced vapour
suction.
1.2. Applications
These vacuum pumps can be used to place under vacuum a process that is designed to resist vacuum conditions
(0.05 mbar absolute pressure).
The pump operating range extends from atmospheric pressure to the ultimate vacuum rating of the pump in
continuous running.
514400.14
EVISA E17/E25/E40/E65/E100/E150/E200/E300
(3) compression and exhaust phase
The use of these pumps is exclusively reserved for the suction of non-aggressive gases,
any damage linked to a different use will not be considered as part of the contractual
guarantee, and in particular:
- The pumping of gases containing more than 22% oxygen
- The pumping of corrosive gases
- The pumping of explosive gases and/or work in an explosive
atmosphere (ATEX)
- The pumping of a substance tending to sublimation
- The use of lubrication oils other than those validated by the MIL'S SAS
company
- The use of the pump as a compressor.
ATEX version pumps or special applications: Contact us.
The temperature of the sucked gas must be between +5°C and +40°C. (For temperatures outside this range,
consult us.). It is imperative to install a paper or polyester filter on suction, whatever the application.
If the gas contains condensable steam, it is mandatory that the pump be equipped with an opened GAS
BALLAST and the pump attain its stabilized operating temperature.
The gas drawn by the pump must not contain any liquid or solid particles. It is necessary to trap them before
the pump by filters, separators and condensers. When using a filter connected to the suction port, this filter
must be fixed to the pump so that no solid particle or liquid can penetrate into the pump during replacement
of the filter element. Contact us.
The surface temperature of certain parts of the pump can exceed +70°C.
1.3. Table of characteristics
See annex
2. INSTALLATION SITE AND TRANSPORT
2.1.

Installation site

The vacuum pump must be installed in an adequately ventilated dust-free and frost-free room.
The ambient temperature must be between +5°C and +40°C.
Consult us for temperatures outside this range.
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