Polyester Disposable filters are designed with a one-piece moisture-resistant chipboard frame enclosing media. The synthetic media filter consists of 100% high bulk polyester fibers that are thermo bonded with a fire retardant resin. Support grilles of perforated corrosion resistant steel or expanded metal are provided on both sides of the filter. The media pads and support grilles are continuously glued to the inside perimeter of the frame, resulting in exceptional strength and rigidity. This design virtually eliminates the possibility of media sag within the frame.
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