ESP Insulators for electrostatic precipitator is majorly used for high-voltage insulation and sealing of the hanging rods for the overhanging frame of the corona electrode, which is passing through the housing of the electrical field. Outer & inner surfaces of the bushing are covered with brown or white glaze, and two end surfaces being ground. They can work at temperature up to 250deg.C with working voltage classes from 72kv to 110kv, and compression failing load not less than 500kn. The inside and outside surface of porcelain casing is brushed with a white glaze or a brown glaze. 85% alumna insulators are extremely dense and will not absorb liquids or gases. They are more resistance to attack by aggressive particulates and gases.