Industrial Filter Repair vs. Replacement | MCE

When an industrial filter becomes clogged or its media reaches the end of its useful life, replacing the entire filter may seem like the obvious next step. But depending on the filter's construction and condition, much of the original assembly may still have years of service left.

Consider sewn-end radial fin filters used in industrial air intake, exhaust, and dust collection applications. These filters have metal inner cores and support structures that can often be reused, even after the surrounding filter media needs replacement.

At Filter Resources, refurbishment typically saves customers 30% to 50% compared with purchasing new filters because the metal core and support structure account for much of the cost of a new assembly.

The question is whether the existing filter is in good enough condition to rebuild, and when replacement is the better investment.

How Filter Refurbishment Works

Consider a plastics manufacturing operation that uses large fans to move polypropylene pellets through its production process. The fans draw in air from the surrounding environment, bringing with it dust and other airborne debris. Depending on the facility's location, that can include everything from road dust to bird feathers. Air intake filters capture these contaminants before they enter the system; but over time, the accumulated debris can clog the filter media and restrict airflow.

Rather than replacing the entire filter assembly, the manufacturer can have the existing metal structure cleaned and fitted with new filter media.

Over time, the filter media becomes clogged and needs to be replaced. But the metal core and support structure may still be in good condition. Rather than purchasing an entirely new filter, the manufacturer can have the existing assembly cleaned, inspected, and fitted with new media.

The process typically involves:

1. Removing the existing filter media. The worn fabric covering is stripped from the filter, exposing the metal core and support structure.
2. Cleaning and inspecting the metal components. The frame is washed and evaluated for corrosion, damage, or other conditions that could affect its continued use.
3. Repairing or replacing damaged components. Rusted, corroded, or bent portions of the metal support structure can be repaired or replaced where practical.
4. Installing new filter media. A replacement fabric or woven alloy wire cover is designed to fit the filter and installed over the refurbished structure.

The result is a filter with new media and a reused metal structure, avoiding the expense of replacing components that still have useful service life.

When Does Refurbishment Make Sense?

Not every industrial filter is a good candidate for refurbishment. The decision depends on the filter's construction, the condition of its components, and whether repairing it makes financial and operational sense.

When evaluating whether to refurbish or replace, consider the following:

1. How much of the filter is still usable? If the metal core and support structure are in good condition, there may be little reason to replace the entire assembly just because the media is worn or clogged.
2. Can damaged components be repaired? Rust, corrosion, or bent supports don't automatically rule out refurbishment. Depending on the extent of the damage, individual metal components may be repaired or replaced.  
3. How does the cost compare with replacement? Refurbishment is generally most attractive when the reusable components represent a substantial portion of the filter's value. The cost of cleaning, repairs, and new media should be weighed against the price of a new filter.
4. Has the application changed? Any changes to filtration media or operating requirements should be evaluated before refurbishment.

In many cases, the decision comes down to how much of the original filter can be retained. A filter with spent media and a sound metal structure may be an excellent refurbishment candidate, while one with extensive structural damage may be more economical to replace.

Get More Life from the Filters and Components You Already Have

Before replacing worn or clogged radial fin filters, consider whether the existing assemblies can be refurbished. Retaining serviceable metal components and replacing the media may allow you to extend filter life while reducing replacement costs.

Filter Resources, an MCE company, refurbishes sewn-end radial fin filters, including repairing damaged support structures and fabricating replacement media. Our team can help you evaluate whether refurbishment is appropriate for your application.

Contact Filter Resources to discuss your filter refurbishment needs.