Providing radiation shielding products and solutions since 1974.
Flexible HEPA Grade Filters

HEPA Grade Filters

Filter Barriers

Lancs and its BOP Filters subsidiary manufacture flexible HEPA filters for use in contamination and particulate control applications. The filters are custom designed, and can be produced in various sizes and shapes. These flat and flexible panel filters can be welded or heat sealed by Lancs into polyvinyl chloride (PVC), or polyurethane (PU) plastic film.

Our industrial HEPA filters have been used in waste volume reduction, personnel protection, hazardous particle containment, environment control for purity of pharmaceutical reactions, containment of explosive environments (such as hydrogen generation during chemical reactions) and over-pressure protection in containment barriers. Applications also exist in biohazards and medical waste disposal, asbestos removal, “clean room” ventilation and equipment protection from hazardous environments.

We produce two standard sizes of filters: 1.5″ and 3.5″ in diameter, but can manufacture them in different sizes if required. Our HEPA filters are made to be welded into bags, sleeves or other barrier materials. The filter media function is the same regardless of the barrier material used.

Filter Testing

We use a customized TDA-100, monodisperse aerosol penetrometer produced by Air Techniques International to produce a DOP particle of 0.3 micron size to individually test each filter. The test is performed in accordance with ASTM D 2986, Standard Practice for Evaluation of Air Assay Media by the Monodisperse DOP (Dioctyl Phthalate) Smoke Test.

Testing is conducted per detailed written procedures that are controlled by our NQA-1 Quality Program (approval pending). We test all 1.5″ & 3.5″ diameter filters to ensure they meet the acceptance criteria specified. Acceptance criteria is at least HEPA grade which is defined as an efficiency of 99.97% with particles of 0.3 microns and a differential pressure of 1 inch of water gauge across the filter specified and can test filters up to 5” in diameter..

The equipment used for testing filters is a customized Air Techniques Inc TDA-100, Monodispersed Aerosol Penetrometer. Testing is performed in accordance with ASTM D 2986, Standard Practice for Evaluation of Air Assay Media by the Monodisperse DOP (Dioctyl Phthalate) Smoke Test.

HEPA Filters Group 2

Quality Assurance

Lancs’ Quality Assurance Team is responsible for reviewing customer requirements, drawings and/or specifications. We conduct thorough oversight of our manufacturing process, from generating shop drawings through fabrication, inspection and test procedures. This assures a customer’s needs are met by the product provided.

We have developed a Quality Assurance Program that is compliant with the applicable sections of ANSI/ASME NQA-1. The Quality Assurance Team is also responsible for our ASNT SNTC1A Compliant Filter Test Program.

Copies of our Quality Assurance Manual and Test Program are available for review upon written request.


BOP Filter/Barriers LLC was formed in 1998 to develop and market the technology of US Patent Number 5,720,789*. The technology was invented by Paul A. Pinson at the Idaho National Laboratory (“INL”) as a solution to a nuclear waste bag venting problem regarding the need to allow air and other gasses to vent from sealed waste bags while maintaining containment of the nuclear contamination.  

The patent was assigned to the Idaho National Laboratory General Contractor at that time, and BOP Filter/Barriers LLC was formed to develop and commercialize the technology. Mr. Pinson, as BOP Filter/ Barriers LLC’s founder and technical lead worked closely with Lancs over the subsequent years, and in December 2011 Lancs acquired the business including its worldwide exclusive license for the patent from Battelle Energy Alliance, LLC, INL’s current general contractor. Mr. Pinson serves as an advisor to Lancs on matters related to filter products.

*“Method for Contamination Control and Barrier Apparatus with Filter for Containing Waste Materials that Include Dangerous Particulate Matter”