he unique design of 3M DF Series filter bags provides end-usersmeasurable performance advantages. Combininggraded porosity media with concentric cylinder geometry results in 62% more filtration area and 67% lower fluid hold-up volume. This extends filter service life by up to 4times, lowers energy usage and reduces product loss and labor cost.
The DF Series is constructed with two concentric cylindersbonded to ring plates at the top and bottom, providing superior structural support and eliminating issues that standard bags have with ruptures and bypass. Fluid enters the annular spacebetween the two cylinders and crosses through the inner cyclinder from out-to-in and the outer one from in-to-out. This configuration reduces fluid hold-up and increases the media surface area available for filtration.
Each cylinder is covered with two layers of media. The outer layer is more open, and the innerlayer is tighter. This graded porosity allowsthe media to hold more contaminant, while allowing fluid to pass with less resistance (lower pressure loss). Additional surface area and graded porosity bothcontribute to increased filter service life and lower energy requirements.
DF Series filter media is seamed with advanced thermalbonding for improve seam integrity. The outersurface of the media is thermally singed to prevent fiber shedding. The media is made with specifically selectedfibers and performance tested to ensure precise and consistent performance characteristics. No adhesive, binders orsilicone is used in the manufacturing process.
3M’s DF Series bags easily retrofit into most standard bagfilter housings. Replacing standardfilter bags with DF Series offers significant benefits. End-users can improve filter performance,minimize product loss and reduce their overall cost of filtration. Ultimately, the switch will reduce waste andenergy usage, while providing improved product quality and process efficiency.
