Operating and maintenance instructions
EN
4
LI 2078.05
2. Product specifications
2.1 Pump description
The vacuum pumps of the DRY series have got two rotors having a claw shape, which
are rotating syn-chronised by a pair of gears. The pumping chamber is lubricant and seal
fluid free. The gears are oil lubri-cated and the same oil is used to lubricate the bearings.
The oil tank is separated from the pumping chamber by means of labyrinth seals. Pump
cooling is assured with a fan.
The electric motor is flanged and it is connected to the lower shaft by means of a coupling.
2.2 Expected use
The pumps of the DRY series have been designed to handle air and small quantity of water
vapour. They are suitable for the evacuation of closed systems or for the operation at a
maximum 150 mbar (DRY 100) and 200 mbar (DRY250 / DRY 300) continuous vacuum.
The recommended ambient and suction tempera-ture must be between 5°C and 40°C.
2.3 Forbidden use
ATTENTION:
The pump MUST NOT handle:
- liquids or solid substances;
- dangerous, explosive or aggressive gases and vapours;
- pure oxygen or air mixtures enriched with oxygen;
It is forbidden to use the discharge of the pump to create even limited pressures.
ATTENTION:
It is forbidden to install the pump in a potentially explosive environment.