4
LI 4431.00 (IT-EN)
Operating and maintenance instructions
EN
2. Product specifications
2.1 Pump description
EU300F - EU300F HWT pumps are single-stage, rotary vane lubricated vacuum pumps,
with oil recirculation.
The flanged electric motor is coupled by means of an elastic coupling.
Cooling is achieved by means of an air/oil cooler and a centrifugal fan.
At the pump inlet there is a mesh filter in order to protect it from solid parts having
diameter larger than 1.5 mm.
Furthermore, an integrated non-return valve prevents the oil coming back and the return
of air in the chamber to be pumped down during the stop phase.
In the tank there is a system of oil smokes separation from the discharged air (maximum
residual 2PPM/weight corresponding to 2.4 mg/m
3
).
The separated oil is recovered automatically by the pump.
Two gas ballast valves prevent condensation inside the pump when pumping down small
quantity of vapour.