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Vacuum Pressure Impregnation system technical parameters
Technical flow process
Equipment operating modes
The equipment should provide following operating modes:
– vacuum degassing and drying before impregnation;
– vacuum impregnation;
– impregnation under pressure;
– drying after impregnation.
Impregnated product is placed into system autoclave in impregnation tank.
System main technical characteristics
No more than
No more than
No more than
2-in the center of the removable supporting grid;
3,4,5,6-sensors allowing autoclave installation in any part
– turning off heating when reaching the maximum temperature in autoclave;
– turning off the air supply when the maximum pressure in the autoclave is reached;
– turning off heating when reaching the maximum temperature in pre-vacuum tank;
– turning off the air supply when the maximum pressure in pre-vacuum tank is reached;
– turning when reaching the maximum vacuum depth in the autoclave and pre-vacuum tank ;
– automatic maintenance of process parameters (pressure, temperature, vacuum) within the specified limits;
– selection of any of the temperature sensors as the setting for the heating control
Reliability requirement
– operating time to failure, hour, No less than 3000;
– life-span, years, No less than 10;
– shelf life, years, No less than 3;
Safety requirements
mg / m3
– vacuum depth in autoclave working volume is below the set limit of the permissible deviation of the vacuum from the set value;
– vacuum depth in pre-vacuum tank working volume is below the set limit of the permissible deviation of vacuum from the set value;
– pressure in autoclave working volume has exceeded the set limit of the permissible pressure deviation from the set value;
– pressure in pre-vacuum tank working volume has exceeded the set limit of the permissible pressure deviation from the set value;
– the temperature in autoclave working volume (impregnating medium) has exceeded the set limit of the permissible temperature deviation from the set value;
– temperature in pre-vacuum tank working volume (on the wall, in the middle part of the heating element) has exceeded the set limit of the permissible temperature deviation from the set value;
– autoclave heater short circuit or overcurrent;
– pre-vacuum tank heater short circuit or overcurrent;
– phasing violation or incomplete phase mode of mains supply;
– excess of the compressor discharge pressure;
– the autoclave lid is not closed or locked
Electrical equipment requirements
COMPLETE REQUIREMENTS
– autoclave;
– vacuum system;
– compressor station;
– pre-vacuum tank;
– impregnating composition preparation and storage tank;
– control system;
– connecting wires and cables set;
– connecting pipes set
– spare parts set
– passport;
– operation manual;
– electrical schematic diagram with a list of elements;
– documentation (certificates, passports, manuals) for purchased components included in the product;
– software documentation
Summary of problems :
1. The temperature difference between the impregnation tank and the pre-vacuum tank can only reach ±3 ℃.
2. The impregnation tank structure can only be provided: the tank body is cylindrical, the upper and lower head is elliptical head container or spherical head container.
3. It is necessary to understand the technological process to determine the cooling mode, air cooling or water cooling.
4. How many materials are used in the impregnation process, and the temperature of each material into the impregnation tank?
5. Is there any resin back to the resin storage tank after the VPI process? If there is resin back feeding, does it need to be cooled?