For the insulation class of transformer satisfy up to class F and class H,We had designed and applied the vacuum-pressure impregnation system layout as below.

This technical process applied impregnating tank under vacuum,exhausted the air between the transformer sheets, and sucked the vanish into tank ,hold the vacuum , then apply pressure for vanish returning to storage tank, hold the pressure, thus the vanish fill into transformer thoroughly ,whole process in a closed system. Flow sheet as follow.

This technical process applied impregnating tank under vacuum,exhausted the air between the transformer sheets, and sucked the vanish into tank ,hold the vacuum , then apply pressure for vanish returning to storage tank, hold the pressure, thus the vanish fill into transformer thoroughly ,whole process in a closed system. Flow sheet as follow.