The vacuum boosters in combination with conventional Vacuum mechanical pumps boost high vacuum upto one micron. Ideal for low cost high displacement and vacuum from 50 Torr to one micron. Suction capacity upto 29,000 M3/hr. Vacuum upto 10-3 Torr i.e. 1 micron in conjunction with backing-up mechanical pump. These Blowers / Vacuum Pumps are provided with a secondary suction. The Blowers / Vacuum units are provided with special effective positive sealing and a double Lip seal at the outboard location.The unit can be offered with direct coupled or V belt drive.