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Ultra-Web® SB pleated bag filters maintain lower pressure drop across the baghouse in the Karastan rug factory, helping to save energy and keep production running smoothly.
Industry: Rug Making
Problem: Fibrous dust from wool rugs clogged up the pleated bag causing high pressure drop (10-inches water gauge) and only 6 months filter life.
Solution: Donaldson® Torit® Ultra-Web® SB pleated bags. The combination of Ultra-Web® fine fibers and wider pleat spacing allows effective pulse-cleaning, achieves stable pressure drop (2.25-inches water gauge), and attains at least twice the filter life.
Not only did they need a baghouse that could handle the fibrous wool dust from spool loading for making rugs, but the plant engineer at this carpet weaving facility wanted filter life longer than six months. Was that too much to ask?
David Hammock of Karastan and his crew operate and maintain eight MAC baghouse dust collectors designed for 90,000 cfm on a 24/5 basis. The pleated bag filters they were using worked for 6 months, then plugged up—as evidenced by the 10-inches water gauge pressure drop and the deficient 55,000 cfm through the baghouse system.
An inspection by Donaldson® Torit® found wool fibers packed in the pleats of the bag that couldn’t be pulsed out. The system had a variable frequency controller on the fan for greater fan efficiency, but it was not being used.
Karastan implemented all of the recommendations and after ten months (5000 operational hours), the pressure drop of the baghouses is stable—between 2 and 2.5 “wg.
David Hammock, Karastan
|Conventional Polyester||Ultra-Web® SB Pleated||Benefits|
|Airflow||55,000 CFM||90,000 CFM||Collectors are now using less energy to operate and are able to operate at the designed flow rate|
|Pressure Drop after 6 months||10 "wq||2 "wg||Filters last longer with fewer filter changeouts|