Automatic roll replacements are furnished wound on spools or cores, ready for installation without modification or adaptors. A core selection guide is printed on the back of this sheet. Six-foot-long kraft paper leaders and trailers are secured to the ends of every roll. Each roll contains 65 linear feet of filtering media in selected widths. Rolls are wrapped in heavy plastic and packed in cartons for shipment. The following media types are available:
Scrim-back spun glass
A nominal 2 in. thickness progressive density spun glass treated with dust-catching adhesive. The roll is backed on the downstream side with a scrim mesh. Density of the scrim is approximately 3 squares per square inch.
Skin-back spun glass
A nominal 2 in. thickness progressive density spun glass treated with dust-catching adhesive. The roll is backed on the downstream side with a spun glass “skin”.
Economy spun glass
A nominal 2 in. thickness spun glass with a very light spun glass skin on the downstream side which is reinforced with a scrim mesh. Density of the scrim is approximately 1 square per square inch. Media weight is about two-thirds that of the standard scrim-back glass.
A nominal 1/2 in. thickness dry, non-woven polyester synthetic fiber medium, reinforced on the downstream side with a scrim backing. Scrim density is approximately 3 grids per square inch.
Same medium as the polyester described above, but treated with a dust-catching adhesive.