The VPI series vacuum pressure motor varnish vacuum impregnation machine impregnates the workpieces in a sealed tank under a certain pressure, which forces the impregnant to immerse more completely into the gaps of the workpieces. The varnish vacuum impregnation machine is specially used forimpregnation of coils of high voltage motors, traction motors, special motors, anti explosion pump motors, magnetic motors, and transformers. The windings after impregnation in VPI vacuum motor varnish vacuum impregnation machine have an improved insulation performance, a reduced surface temperature, an improved mechanical strength, a reduced fault rate, a better anti-moisture capacity, and a long service life.
The vacuum impregnation machine is also called as vacuum pressure impregnation system, vacuum impregnation equipment, warmish vacuum impregnation machine, vacuum impregnation tank, etc.
Supply Scope of VPI 1600 Motor varnish vacuum impregnation machine |
Vacuum impregnation tank, Φ1600mm×1600, 2 sets; Resin storage tank, Φ2000mm×4000mm, 1 set; Vacuum system, 1 set; Resin supply system, 1 set; Vacuum buffer, 1 set; Exhaust system, 1 set; Pressurizing and pneumatic system, 1 set ( air source supplied by buyer) Hydraulic system, 1 set; Exhaust system, 1 set; Cooling water circulation system, 1 set; Refrigeration system, 1 set; Control system, 1 set; Spare parts: 1 set; |
Electrical control system for motor varnish impregnation machine 1) PLC control with touch screen, Siemens 2) low voltage control electrical equipment 3) industrial computer, printer 4) automatic testing of presure, vacuum and temperature, automatic printing of each operation process |
Main Features
1 High vacuum pressurizing impregnating equipment is the key equipment for
insulation treatment of high voltage motors, special anti-explosion motors, and
transformers. The vacuum impregnating treatment enhances the mechanical strength,
insulation, anti-moisture and anti-mold performance of the windings.
2 Installation type: vertical.
3 Technical documents to be provided: qualification certificate, technical features paper,
main pressurized components material list, welding line radiographic examination report,
spare parts nondestructive examination report, pressure vessel appearance and physical
dimension test report, welding test plate mechanics and curving performance examination
report, pressure test inspection report, inspection certificate of pressure vessel product
safety performance.
4 Manufacture standards to be complied wit: Steel Pressure Vessels GB150-1998;
Welding Specification for Steel Pressure Vessels JB/T4709-2000; Vacuum System Design
Standard JB/T4709-2000.
1.5 Sealing ring of the impregnating tank: gas-filling type sealing ring.
Application Scope:
Vacuum pressure impregnation plant for small & medium motor is mainly applied to the vacuum pressure impregnation treatment of small & medium motor.
Under the effect of vacuum pressure impregnation, motor is dehydrated and degassed in the vacuum stage to reduce the impact of water and air on insulation. And in the pressure impregnation stage, the inner insulation structure is permeated by insulating varnish to upgrade insulation and to improve electrical performance.
Tank Dimension | Limited vacuum degree | Leakage rate | Heating(ºC) | Cooling | Working pressure |
1800*2000mm | ≤500pa( no load) | ≤100Pa.Ls | Optional | Optional | ≤0.6 |
1200*1600 | ≤500pa( no load) | ≤100Pa.Ls | Optional | Optional | ≤0.6 |
1600*1800 | ≤500pa( no load) | ≤100Pa.Ls | Optional | Optional | ≤0.6 |
Custom made Vacuum Pressure Impregnation |

Vacuum pressure impregnation equipment is also used in the materials industry to solve material modification and improve the structure of the material to achieve the purpose of improving material properties. Such as graphite products, engine casings and other precision castings, refractory bricks, wood and so on. Through vacuum pressure flooding, it increases the compactness, strength and electrical resistance of graphite: in automotive engine castings and high-pressure valves, through vacuum pressure, it can completely solve the phenomenon of micro-leakage, improve the qualification rate of products and eliminate workpieces. Its own leakage. Refractory bricks and wood can change the characteristics of the substrate by different diffusing agents such as asphalt and anti-separation agents to achieve different effects.



Equipment classification
Wind turbine, EMU traction motor, high voltage motor vacuum pressure dip coating equipment
Dry type transformer vacuum pressure immersion equipment
Dry casing, capacitor vacuum pressure oil immersion equipment
Other diffuse equipment
Process advantages
Craftsmanship, anger, dehydration is easy;
Residual water rate (10ppm or less), product insulation performance is good;
Good moisture resistance;
The product has excellent dielectric properties;
The impregnating agent can be reused to reduce environmental pollution;
The time required for impregnating the product is short, the effect is good, and the production efficiency is greatly improved.
Features
Based on state-of-the-art technology such as pressure vessel, vacuum, pressurization, refrigeration, heating and automatic control, it is carefully designed and manufactured. The safety equipment can be PLC or computer. Fully automated measurement and control. Safety alarm and interlock protection are installed to ensure safe use.
Working principle
The vacuum pressure is to place the workpiece in a vacuum force vessel. Vacuum is used to remove traces of moisture and gas from the work, and then the flooding liquid is injected into the vacuum by a pressure difference or a transfer pump, and a certain pressure is applied to immerse the immersion liquid in the gap of the workpiece to achieve the purpose of full impregnation.
The vacuum pressure is to place the workpiece in a vacuum force vessel. Vacuum is used to remove traces of moisture and gas from the work, and then the flooding liquid is injected into the vacuum by a pressure difference or a transfer pump, and a certain pressure is applied to immerse the immersion liquid in the gap of the workpiece to achieve the purpose of full impregnation.
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