There are three (3) different kinds of cloths on a filter press: the head cloth, which is for the first plate and is a single cloth with a hole in the center; the tail cloth, which is for the last plate and is also a single cloth but with NO HOLE in the center; and the intermediate cloths, which are all the cloths on the plates between the head and the tail. These cloths are double cloths, with one cloth on each side of each plate, and the hole in the center of each side is connected by a short cloth tube.
WARNING:
Take care in putting the plates back into the filter press. There are two different kinds of plates. They are designated as a one-button plate or a three button plate. The plates can be identified by a drill hole that is about 1/4” deep, in the handle of the plate. The one button will have one hole and the three buttons will have three holes.
The head plate is usually a one button plate. The next plate MUST be a three-button plate then a one-button plate and so on. The filter press plate sequence is 1-3-1-3, and so on. If this order is not correct, the filter cake will not dry properly during the Blowdown process.
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