Notice When Changing Filter Cloths
There are three (3) different kinds of filter cloths on a filter press: The head cloth, which is for the first plate; the tail cloth, which is for the last plate; and the intermediate filter cloths, which are all the filter cloths on the filter plates between the head and the tail. These cloths are double cloths, with one filter cloth on each side of each plate, and the hole in the center of each side is connected by a short cloth tube.
How should we change the intermediate filter cloths and what should we notice in the changing process?
1, Taking care not to damage the plastic plate, insert a thin bladed screw driver into the one of the grooves at the outer edge of the filter cloth and pry a small section of the cloth out of the groove, or if the cloths are not to be reused, cut a ~6” slit into the cloth about 1” away from one of the corners of the cloth.
2, Repeat step 1 to the other groove on the other side of the filter plate.
3, Grab the exposed cloth from step 1 with vise grip pliers or equivalent, and pull the remaining cloth out of the groove.
4, Repeat step 3 to the other side of the plate.
5, Fold the one side of the filter cloth in such a way that it can pass through the hole in the center of the filter plate, and push the cloth through the plate and discard appropriately.
6, Inspect and remove any accumulated solids from the groove on both sides of the filter plate.
7, Fold one side of the new cloth in such a way that it can pass through the hole in the center of the filter plate, and pass the cloth through the hole in the center of the filter cloth.
8, Aliening the new cloth into position by lining up the corners of the cloth to the corners of the plate.
9, Using the cloth installation tool, pound the sewn-in bead or caulk of the filter cloth, into the groove of the filter press plate.
10, Ensure that the caulk has been fully seated to the bottom of the groove. Advance around the groove by pounding in about 2” to 3” at a time.
Repeat step 9 to the other side of the filter press plate and cloth.
Repeat steps 1 through 10 for each intermediate plate of the filter press.