Electrostatic spraying bell process

As originally introduced. Electrostatic Bell Process 2 was used primarily with solvent-based coating materials. The bells were rotated at the lowest possible rate consistent with obtaining good atomization of these materials because it was desired that the mechanical forces acting on the sprayed particles be held to a minimum. Rotation rates were on the order of 1800-3600 rpm. With the recent advent of high solids and waterborne materials that are much harder to atomize, it has become necessary to increase the rotation speed of the bells. Most bells used with this system today are rotated at 20,000-30,000 rpm. This Increase does increase the size of the spray pattern emitted from the bell but does not materially decrease the overall transfer efficiency on those applications where the arrangement of the equipment has been made with this fact in mind. 

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