Operating Principle And General Information Description; Applications; Table Of Characteristics - MIL'S SIRELLA SL100.R Instrucciones De Uso Y Mantenimiento

OPERATING PRINCIPLE AND GENERAL INFORMATION
Description
The SIRELLA-Series vacuum pumps are claw vacuum pumps, EC marking according to the directive
2006/42/CE.
They operate upon a static compression system that works by internal air volume contraction.
During rotation, the gas is pumped, then compressed and driven back. There are two compressions per
turn.
Compression is known as dry: the compression chamber is free of any oil.
Two iron claw type rotors rotate in opposite direction inside the housing without contact, synchronously by
two helicoidal gears.
First step
Claws trap a volume of gas at the suction.
Third step
Gas is compressed (compression chamber).
520820-01
SIRELLA SL100.R / SL150.R / SL300.R
Second step
Claws convey gas to the exhaust
Fourth step
Gas is discharged.
Gears and bearings are in a tight oil casing that also serves as an oil tank.
Gears are lubricated by paddling and bearings are lubricated by oil canal.
There is a perfect sealing between the casing and the housing.
A turbine fitted on the driving coupling ensures air circulation between the pump and the sound-proof
cover. The air is sucked through an opening on the front of the cover then driven back through an opening
on the side of the cover.
The compression is dry. The only "cooling fluid" is the air sucked in. In order to avoid a
destruction of the compression stage by an excessive rise of the temperature, it is forbidden to
operate at a lower pressure than the "continuous end vacuum".

Applications

These vacuum pumps are used to vacuum a process designed to withstand vacuum (5 kPa absolute).
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
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.
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.
During maintenance operations on a SIRELLA vacuum pump, use a noise-reducing protection.

Table of characteristics


See ANNEX
8