Under effect of heat and electric field, the exposure of insulation oil contained trace water, gas and particulate matters etc. The use of Full-automatic Double-Stage Vacuum Transformer Oil Purifier is necessary, which will help you maintain optimal oil cleanliness. The series utilize the brand Programmable Logic Controller and alarms and interlocks to provide a fully automatic operation. Manual control of various functions is provided as required. Several Pilot Lights are provided to indicate operational status of key components and alarm conditions.