Knight Standard Liquid Filter Bags

Prompt Quotations
Send us the specifications for the filter bag you need or a sample of the bag you are currently using. We will get back to you quickly with our recommendations and a highly competitive quotation. Upon your approval of our price, we will provide you with a sample bag to enable you to evaluate the bag’s effectiveness for your application. Once you have approved the proposed bag, Knight Corporation will generate your order to the highest standard of quality and ship in less than a week.

Custom Liquid Filter Bags To Your Specifications
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.

Quickest Delivery of Stock Liquid Filter Bags in the Industry
We designed our stock filter bags to increase the efficiency of all make 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.

Carbon steel rings are standard, however plastic tops or stainless steel rings can be supplied upon request. Other options available on our stock bags include plastic rings, lifting handles, covers and glazing.

We also offer stock tie-on bags, which are perfect for all gravity applications. They are available in a wide range of materials and micron ratings. Drawstrings on the stock bags are available on request.

Knight Stock Liquid Filter Bags Are Shipped Within 1 Week

Stock Liquid Filter Bags Available For All Make Filter Vessels

Bag Size Number (see table 1) 3 4 1 2
Surface Area Per Bag (ft2) 0.5 1.0 2.0 4.4
Volume Per Bag – (gal) .37 .67 2.1 4.6
Bag Diameter – inch/cm 4/10.2 4/10.2 7/17.8 7/17.8
Bag Length – inch/cm 9/22.9 15/38.1 16.5/41.9 32/81.3
Knight Corp Filter Housing Numbers PK-6 GK-12 CK-15 RK-30

Some of the companies currently using our products include:


Contact us for more information


Houston, TX (281) 933-5363 Knight Corporation 2009 Ardmore, PA (610) 853-2161