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  • Rugged self-sealing polyurethane ends - not plastisol (PVC)
    • No bypass or cracking with age
  • Textile media - not paper
    • Handles moisture, vibration, and abuse
  • Genuinely cleanable
    • Practical & economical
  • Exceptional performance
    • Lower ΔP and longer life

More than 50 years ago, molded end filter elements challenged the worst of punishments in industrial and military services. Today, with synthetic rubber ends, they are still arguably the finest air/gas filters ever made.

Cross Referencing / OEM Replacement

We provide high-quality replacements for dozens of filter brands including Dollinger, Consler (Graver), Solberg (SMI), Air Maze, IFM, Clark-Reliance, Sunshine, Sidco, NAFCO, Ingersoll Rand, Stoddard, Endustra, Atlas Copco, and many more.

Please contact us today with your part number or specifications for a quote. 

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Rugged Construction

Standard construction includes solid rubber (polyurethane) ends, heavy-duty perforated metal center cores, and radial pleated filter media jacketed with woven wire screen.  This screen jacket holds fins open, greatly improving flow capacity, service life, and durability. Textile media are well known for superior performance and clean-ability vs. fragile paper media. This industrial grade construction has been long proven to yield higher flows, longer life, and lower ΔP.

Polyurethane Molded Ends

The filter media, support screens, and element cores are bonded together by the polyurethane end seals.  Our polyurethane is much more rugged and durable than lesser polyvinyl elastomers used by others.  It will not crumble in service as under-cured PVC can. PVC is as much as 50% plastisizer. When this plastisizer evaporates, PVC ends can crack and fail.  

Production molds are carved from solid stock (no stampings) for exacting end seals. These seals stop dirt and resist most oils, solvents, moisture, or vibrational punishment. They can withstand continuous service to 200° F.


Core & Wire - Center core material options include carbon steel, 304SS, 316SS, or electro galvanized expanded metal.  Thicknesses up to 11 gauge can be selected for high collapse/burst pressure requirements.  The standard woven wire support is epoxy coated aluminum, but 304SS, 316SS, and galvanized support screen is also available.

Filter Media - Our standard media is 10 µm polyester felt, but dozens of media options are available for particulate or coalescing applications.  Efficiencies vary from 750 µm down to 0.1 µm.

End Seals - Other end seal options include black PVC, oil and gas resistant PVC, white PVC (for use in processes related to food), and silicone RTV good to 500° F.  For high-heat and chemically aggressive applications, metal end designs are available with special potting and gasket material.

Size - Typical sizes include overall heights to 40", outside diameters to 36", and inside diameters from 1" to 30".  If you need a larger element, please This email address is being protected from spambots. You need JavaScript enabled to view it. for a custom quotation.


This standard end seal employs one or typically two narrow raised circular sealing surfaces.  The center most seal usually stands directly above the center core, ensuring column strength is passed along to the seal when installed in service.  The IR end seal employs a single raised sealing surface directly above the center core at the very inside diameter of the filter.  When the lid of a filter housing has a domed cross section, the IR seal is occasionally necessary to avoid a fit conflict at the shoulder.

Contact Us

Shawndra Products™, Inc.
Rush Certified and A&E Testing

1514 Rochester Street
Lima, NY 14485
Phone: 585-624-4500
Fax: 585-624-5300
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.