China Vacuum Pressure Impregnation (VPI) Plant

VPI plant is special equipment for varnish/resin impregnation of Motor, Resin-casting-transformer, capacitor etc.

Structure of VPI plant

1.     Impregnation tank

2.     Varnish/resin storage tank

3.     Vacuum system

4.     Varnish/Resin circulation system

5.     Hydraulic system

6.     Pneumatic system

7.     Cooling water pipeline system

8.     Measuring and control system (with PLC and computer).
 

n  The vacuum impregnation process (VPI) is a multi-step procedure.

n  1. Load objects into the vacuum-pressure-tank.

n  Start vacuum system to evacuate vacuum-pressure-tank down to 4-5 mbar and maintained for a minimum of half an hour.

n  2. The vacuum-pressure-tank is then flooded with impregnating material (Varinish/ Epoxylite) which fully submerses the objects.

n  3. Start vacuum system to keep vacuum-pressure-tank at around 10mbar for a minimum of half an hour.

n  4. The vacuum is released and a positive pressure around 0.6mbar is applied to the vacuum-pressure-tank for at least 30 minutes.

n  5. The pressure is released from 0.6mbar to 0.2mbar. And impregnating material is discharged to storage tank.

n  6. The pressure is released from 0.2mbar to atmospheric pressure and the object removed from the vacuum-pressure-tank.

n  7. The objects are placed into an oven around 130 ℃ for 11 hours for curing.
 

YANG MING MACHINERY IMPORT&EXPORT CO., LIMITED

Frank YANG (marketing director)

Add:Room 703, Building 6, Huiya Garden; No.5, exhibition east road, Torch development zone, Zhongshan, Guangdong, CHINA; Post code:528437

Tel:+86-18933341346

Fax:+86-76085332587

Mob:+86-13923325364