The oil sealed rotary vane high vacuum pump is widely used in heat treatment industry on a vacuum system. Customers can use this wet, positive displacement pump alone in low to medium vacuum applications, or use it along with booster pump for high vacuum applications. This type is commonly called a wet pump since oil is used as a lubricant to help seal the pump. Because of this, the oil is selected and specially formulated. This pump that operates by positive displacement trap and moves gas mechanically, creating low inlet pressure on the inlet side.