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Consistent 1.2" H₂O differential pressure has been maintained since installation of GORE membrane filter bags despite a 9" H₂O excursion due to pulse-system failure. There has been no noticeable dust on the clean side of the tube sheet since installation. The first set of bags lasted three years.

Secondary after-filter blinding was eliminated. GORE membrane filter bags were cost justified in less than one month. Bag life was expected to approach two years. Customer quickly converted all SAN and ABS dryer systems to GORE membrane filter bags. Customer increased profits substantially in these areas.

Airflow increased by 10%. Production rated increased. Lower operating DP 1-2". Improved cake release eliminated product discoloration and product contamination. Bags attained 5+ years of service.

Lower operating DP (5"-7" DP) improved cake release, allowing increased airflow through collector. Bleed-through stopped, allowing capture of product. First set of bags lasted more than five years.

Results showed no visible emissions, excellent and consistent product yield, and secondary filter blinding significantly reduced. No bag failures since installation.

Solution involved installing GORE Fabric Filter Bags. Results were sixty months of continuous, problem-free service, with excellent pressure differential.

Bag life is now between 9 and 18 months, as opposed to the previous 2-4 months. Energy savings due to low DP is about $2,000/year. Emissions are virtually non-detectable with 0% opacity. Improved product recovery provided over $10,000/year of additional salable products. Less downtime and improved airflow equated to a production increase of over 10%.

High production levels and low pressure drop. Increased mill efficiency yielded considerable energy savings by producing a set tonnage in a much shorter period. The excellent cake-release characteristics enabled the collector to be operated continuously for 12 months at a maximum pressure drop of 5" w.g. The emission problem was eliminated.

Production goals met and exceeded without enlarging the baghouse. The bags have performed consistently well for the past 12 years, with scheduled changeouts every 24 months (although bag life has reached 30 months).

The filter bags provided over 12 months of less than 6" DP service and allowed continuous production. At the design rate of 2,080 lb/hr failure occurred because of wear at the snap band cuff due to cage movement.