Learn about single-stage oil ring vacuum pumps PVL401-541
VL 401 and PVL 541 are single-stage rotary vane lubricated pumps with oil circulation. The flanged electric motor is connected by an elastic coupling. Cooling is provided by an air/oil heat exchanger and a centrifugal fan. An integrated check valve prevents oil from returning and air from returning to the chamber for pumping down during the stop phase. The oil tank is equipped with an oil mist separation system from the exhaust gas; the separated oil is automatically recovered from the pump. The gas ballast prevents condensation inside the pump when sucking in small amounts of water vapor.
The PVL 401 and PVL 541 pumps are suitable for evacuating closed systems or operating at constant vacuum in the following ranges: PVL 401 – PVL 541 from 0.5 to 300 mbar (absolute) PVL 401 B – PVL 541 B from 10 to 850 mbar (absolute)
ACCESSORIES
The following accessories are useful for the installation and control of the operating parameters of the pump:
- External suction filter
- Vacuum gauge / vacuum regulator
- Pressure gauge / pressure switch
- Thermostat
- Minimum oil level switch









