Transformer vacuum drying systems are designed and built to remove air and moisture from electrical transformers under vacuum and to fill with insulating oil while under vacuum. Our Vacuum pumping units are industrially used for evacuating different gaseous media. They are mainly used in the electric industry with pump speeds up to 2500 m3/h and operating vacuum up to 10-2 mbar(or higher). The vacuum pumping units offered by us consist of one or several Roots vacuum pumps in combination with liquid-ring or rotary-vane vacuum pumps.
The combination of the different pump types depends on the nature of the media to be pumped off as well as the pump speed and the required operating and ultimate vacuum, respectively. These vacuum pumping units are built both for the application in our vacuum systems and as stand-alone-pumping units.
Our Transformer drying vacuum systems are used extensively in manufacture and maintenance of power distribution equipment and components. In vacuum drying and dehydration process, the condensable vapour load is usually high, particularly in the primary phase of the process. Some vapour will condense in the oil of vacuum pump resulting in decreased vacuum performance. We have designed systems to counter these issues.
Our systems include Heavy duty reliable vacuum pumps with gas ballast valve, roots type vacuum boosters with integral by-pass for start up at atmosphere and fast pump down. Inlet tee with liquid trap and level switch for flood alarm and safety shutdown, Manual isolation valve at booster inlet, Anti vibration mounts for backing pump, Digital Vacuum Gauge and control panel with phase reversal switch.