Vapour Phase Drying Plant

PROVAC make Vapor Phase Drying Plant is used for Drying Power Transforms & Distribution Transformers

The main difference between conventional vacuum drying and vapor phase drying is that, in the latter the heat carrier is vapor of low viscosity solvent with sufficient high flash point instead of air.

Also vapor phase drying system have a evaporator, condenser system in addition to vacuum vessel & vacuum pumping unit, as shown in below schermatic.

In vapor phase drying system, solvent vapors are sent into the vessel. The solvent vapors are at high temperature (Up to 125 Deg C) and the job is under atmospheric temperature. The vapor meets the job directly & the job gets heated. In the process vapors are cooled & get condensed. The latent heat is released which is utilized for job heating. Along with job insulation in job gets heated & the moisture in the insulation is converted into water vapor & condenses in solvent condenser together with solvent vapor.