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Knight Filters

High- Efficiency Liquid Filter Bags – 300 and 500 Series

It is with great pride we announce the development of two new and advanced filter line series to meet your high-efficiency needs. These are the Knight High-Efficiency (KHE) 300 and 500 series. Knight Corporation has a long history of providing industry with the highest-quality liquid filter bags for high-efficiency applications. Since 1988 we have continued to expand our expertise and improve our manufacturing techniques on high-efficiency filters to keep pace with changing needs and demands of the filtration industry. The new KHE 300 and 500 series have further improved the performance of the original Knight all microfiber design by adding special media, which increases filter life and efficiency.

Welded Liquid Filter Bags

These bags have super-strong, thermally welded seams and our exclusive Sure-Seal flange top. With all seams thermally sealed, Knight’s Welded Liquid Filter Bag is one of the most durable, dependable, and consistent heat-welded bags in the industry. After more than 35 years in the filtration industry, Knight Corporation continues to demonstrate improvement in manufacturing processes, technology, and expertise.

Standard Liquid Filter Bags

We designed our stock filter bags to increase the efficiency of all makes of filter vessels. They are fabricated to fit all standard-size filter vessels currently used in the filtration industry. The filter bag sizes we carry in stock are P1, P2, P3, P4, P5, P6, P7, P8, P9, P12, PC1, PC2, C1, C2, and RP bags. Our stock bags handle flow rates up to 10,000 gpm and are available in most materials.

Extended Life Liquid Filter Bags (XL)

As the name suggests, Knight Extended Life Liquid Filter Bags are designed to give longer service life, therefore reducing operating costs and process downtime. Knight “XL” filter bags are available in a variety of sizes and materials.

Oil-Thirsty and Oil-Sorbent Filter Bags

This bag is the answer to removing trace oil and grease from an industrial stream of aqueous-based fluids. To better meet your needs, the Knight Oil-Thirsty Bag can be designed to remove from 2 to 16 lbs of oil by increasing layers or adding Oil Thirsty strips, which add to the surface area and increase efficiency, structural strength, and filter life.

Our Oil-Thirsty Bag is designed with a cover for the prevention of fiber migration and includes reinforced lift handles to facilitate its removal. If waste storage is a problem, the Oil-Thirsty Bag can be completely disposed of by incineration.

The ideal oil removal system includes the combination of the Knight Oil-Thirsty Bag, which acts as an oil load prefilter, and the Knight High Efficiency Bag (KHE 300 series), which acts as the final polish filter.

Custom Filter Bags

If you have a unique filtering problem, Knight can customize a filter bag to meet your exact specifications. Over the years we have provided customers worldwide with innovative solutions to their most difficult filtering problems. We can manufacture any filter bag, including bags with covers, extended-length bags, special-shaped bags and multiple-layered bags. Our custom bags range in all sizes to accommodate your needs, from 3-inch diameter and 5 inches long to 25-inch diameter and over 25 feet long. Knight provides over a million custom bags per year.

Custom bags are available in mesh and felt, Nomex, nylon, polyester, cotton, polypropylene, and Teflon in a wide range of micron ratings. Special materials can be provided upon request.