Operating Principle And General Information; Description; Applications; Table Of Characteristics - MIL'S EVISA E25.R Betriebsanleitung

EVISA E25.R / E40.R / E65.R / E100.R / E200.R / E300.R / E350.R / E400.R / E500.R / E600.R
1.

OPERATING PRINCIPLE AND GENERAL INFORMATION

1.1.

Description

The EVISA type pumps are lubricated-vane vacuum pumps, EC marking according to the directive
2006/42/CE.
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 (3) compression and exhaust phase
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.
A 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 are used to vacuum a process designed to withstand vacuum (0.05 mbar absolute).
The operating range of these pumps extends from atmospheric pressure to the limit vacuum of the pump
in continuous running.
520746-00
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 spare parts or lubrication oils other than those validated by the MIL'S
company
 The use of the pump as a compressor
ATEX version pumps or special applications: Contact us.
The suction gas temperature must be between +5°C and +40°C. (For temperatures outside this range,
please contact us). It is imperative to install a paper or polyester filter on the suction side, whatever the
application.
If the gas contains condensable vapours, it is imperative that the pump is equipped with an opened gas
ballast and that the pump has reached its stabilized operating temperature.
The gas sucked in by the pump must not contain liquid or solid particles, it is necessary to trap them before
the pump by filters, separators and condensers.
Certain gases can be trapped before the pump by means of a carbon filter placed between the paper or
polyester filter and the application.
Some parts of the pump have surfaces where the temperature 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.
For temperatures outside this range, please contact us.
Ensure that the pump is not installed near heat radiation devices or pipes.
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