To enhance the solution flow through the filter, F58 Filter Bags are made from a hydrophilic material. When exposed to 1N sulfuric acid at high temperatures the material can break or crack at the seams/seal. Make sure each bag is sealed within 4mm of its open end. This section includes a narrow polypropylene strip that provides elasticity to the heat-sealed area of the bags to prevent cracking. In addition, with some older bag suspenders, the F58 bags are susceptible to abrasion.
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To minimize breakage at F58 Filter Bag seams, you should use the new F58 bags (as of March 2015). The seams of the new bags are strengthened by the addition of point bonds next to the edge of the seal.
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To minimize bag material abrasion, you should use the new bag suspender (as of March 2015 - part # F11). It has been redesigned to include rounded bottom points on each tray.
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