Introduction

The oil to be dried by Vacuum Dryer can minimize the moisture contained in the oil until less than 0.08 % with a condition that oil to be processed at a temperature of at least 90°C and moisture concentration does not exceed 0.8 %.

The oil to be processed from purifier will be injected into float tank, in this float tank there is a taper spindle that serves as automatically valve to keep the constant vacuum in the vacuum chamber continuously.

In vacuum chamber there are six spray nozzles that inject oil to deflector surface. The oil released from spray nozzle is in spray shape and cloudy, and then falls gravitaly and strikes the deflector plate to allow the second cloudy. During oil in cloudy shape the concentration of moisture will be easy evaporized and sucked readly out by vacuum pump. The dried oil will be then fallen into vacuum chamber bottom and sucked directly by pump to storage tank.

A level control is connected into vacuum chamber serving to control the level altitude of oil. The oil fed into vacuum chamber when less than oil injected out, this level control will automatically open the valve to allow oil to be recirculated into vacuum chamber through by-pass piping. Level control damaged can result in too high oil level and will not allow the oil coming into vacuum chamber, and therefore level control switch will work automatically to stop the drying process so that the unprocessed oil will not be sucked into storage tank.