Rotary Vane Vacuum Pump is designed with unique lubrication system, built-in oil pump and with a large oil volume capacity ranging from 0.5 L to 4.0 L. In addition to providing smooth, pulse-free air flow, these oil sealed rotary displacement pump are compact and easy to install and operate, have low starting and running torque requirements, produce minimal noise or vibrations and are capable of long, service-free life.