Donaldson Air Filter DBA5225 — 12.68 in Radialseal Primary with Ultra‑Web Nanofiber

The Donaldson DBA5225 is a primary radialseal air filter with 12.68-inch length and Ultra-Web nanofiber media engineered to trap fine particulates while maintaining airflow.

This replacement air filter combines a radialseal mounting style with Donaldson's Ultra-Web nanofiber filtration media to deliver consistent engine protection and long service life. It’s designed as a primary intake filter for heavy equipment, trucks, and industrial engines that require high-efficiency particulate capture without compromising performance. The construction balances dust-holding capacity and airflow to help maintain engine power between service intervals.

How does this filter improve filtration without restricting airflow?

Donaldson’s Ultra-Web nanofiber layer captures submicron particles on the media surface rather than deep inside, which increases efficiency while preserving flow. The radialseal design creates a reliable seal at the housing interface so all incoming air passes through the media.

• Surface-loading nanofiber web for efficient fine particle capture
• Pleated media area maximizes dust-holding without dense packing
• Radialseal mount ensures consistent, leak-free fit
• Rigid support structure prevents collapse under high intake vacuum

What are the key specifications and materials?

This unit measures 12.68 inches in overall length and is built as a primary-type cartridge with a radialseal interface. The media is Donaldson Ultra-Web nanofiber supported on a durable frame designed for rugged operating environments.

• Length: 12.68 inches (overall)
• Type: Primary air filter, radialseal style
• Media: Ultra-Web nanofiber composite for high-efficiency filtration
• Construction: Reinforced frame and pleated media for durability

How do I know when to replace the DBA5225?

Replace the filter according to the engine or equipment manufacturer’s service schedule and sooner in dusty or contaminated environments. Visual inspection for heavy dust loading, damage to the seal or media, or a decrease in engine performance are common reasons to change the element.

• Follow OEM service intervals for primary filter replacement
• Inspect after operating in high-dust or abrasive conditions
• Replace if seal, frame, or media show wear or damage
• Monitor engine performance and intake restriction indicators where available

How does installation and compatibility work for this radialseal unit?

The radialseal flange compresses against the airbox to form a secure seal; installation is a simple drop-in for housings designed for radialseal cartridges. Always verify part number fitment with the equipment’s parts list or Donaldson’s cross-reference tool before installation.

• Install by seating the radialseal flange evenly into the housing groove
• Compatible with housings specified for DBA5225 or equivalent Donaldson part
• Check orientation and seating to avoid bypass or seal gaps
• Use OEM or Donaldson guidelines for torque or clamp specifications where applicable

Who is this for: The Donaldson DBA5225 is intended for fleet managers, heavy equipment operators, and maintenance technicians who need a dependable primary air filter that balances fine-particle efficiency with sustained airflow. It suits applications where dust and airborne contaminants are a concern and where a robust radialseal cartridge simplifies replacement and sealing. If you maintain trucks, construction machinery, or stationary engines and prioritize reliable particulate control and predictable service intervals, this filter is a practical choice.