- Transformer drying machine
- Transformer winding machine
- transformer core processing machine
- transformer insulation Processing machine
- Transformer testing equipment
- transformer components
- Vacuum Pressure Impregnation (VPI) Plant
- Vaccum Resin Casting Plant
- (Transformer Coil) Hydraulic Pressing Machine
- oil purifier
- other machines
- Corrugated wall transformer tank production line
Tel:+86-13923325364
Fax:+86-76085332587
Mob:+86-13923325364
Email:ymmachinery@vip.sina.com
Msn:ymmachinery@outlook.com
Skype:frankyangming, Whatsapp:+8613923325364
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 
VPI Process
The vacuum impregnation process (VPI) is a multi-step procedure.
1. Load objects into the vacuum-pressure-tank.
Start vacuum system to evacuate vacuum-pressure-tank down to 4-5 mbar and maintained for a minimum of half an hour.
2. The vacuum-pressure-tank is then flooded with impregnating material (Varinish/ Epoxylite) which fully submerses the objects.
3. Start vacuum system to keep vacuum-pressure-tank at around 10mbar for a minimum of half an hour.
4. The vacuum is released and a positive pressure around 0.6mbar is applied to the vacuum-pressure-tank for at least 30 minutes.
5. The pressure is released from 0.6mbar to 0.2mbar. And impregnating material is discharged to storage tank.
6. The pressure is released from 0.2mbar to atmospheric pressure and the object removed from the vacuum-pressure-tank.
7. The objects are placed into an oven around 130 ℃ for 11 hours for curing
Standard Impregnation-tank size and parameters
Impregnation Tank Size (mm) | Working Vacuum (mbar) | Leak Rate (mbar.L/s) | Working Pressure (Mpa) |
ï¿ 800*1200 | 5 | <1 | 0.6 |
ï¿ 1200*1600 | 5 | <1 | 0.6 |
ï¿ 1600*1800 | 5 | <1 | 0.6 |
ï¿ 1800*2000 | 5 | <1 | 0.6 |
ï¿ 2400*2200 | 5 | <1 | 0.6 |
China vacuum pressure impregnation (VPI) plant
Chinese VPI plant
Chinese vacuum pressure impregnation (VPI) plant
Vacuum pressure impregnation (VPI) plant China
Chinese VPI plant manufacturer
China manufacturer of VPI plant
Chinese AC motor vacuum impregnation
Contact: Frank: Mob/whatsapp :+86 13923325364
Email:ymmachinery@vip.sina.com; Skype:frankyangming
Chinese Foil Winding Machine; China VPD plant; transformer vacuum drying oven; Cut-To-Length Line for Transformer Lamination; Vacuum Pressure Impregnation Plant
