ZYD series two stage high efficient vacuum oil purifier contact list: ccqqn_oilpurifier@yahoo.com.cn ccqqn.oilpurifier@gmail.com msn: nanjigudan@hotmail.com cell: 0086-13635450184 main products description: 1/.this oil recycling machine could remove the water, gas, impurities in the transformer oil, insulating oil, switch oil and others. 2./ it could improce the breakdown voltage from 15kv to 75kv. also it could make the max. vacuum rage to less than 5 pa. 3. it could be as a dryer to dry the transformer and other eqquipment.