HD-2390 electric waste oil extractors adopt special pumps with high vacuum speed and strong negative pressure ability, which can extract each kind of non-corrosive waste oil. It is a multipurpose machine, which can use in situations without lift equipment and trench. The cylinder of high-grade transparency adopted can observe and measure the oil capacity primarily. The waste oil can be observed by the oil window. The release pressure protective device that is equipped with the machine body makes it safer, more convenient, and faster to use.