Air Filter AF25708 – Primary Air Filter for Diesel Engines

The AF25708 Air Filter is a primary air filtration element designed to remove dust and other airborne contaminants from the intake air. It uses a cellulose filter media and supports clean airflow before air enters the engine. The manufacturer identifies AF25708 as an OptiAir primary air element and reports a full-life efficiency of 99.99% under its specified test standard.

🔩 Specifications

• Part Number: AF25708
• Part Name: Air Filter, Primary
• Filter Type: Primary Air Filter Element
• Series: OptiAir
• Media Type: Cellulose
• Application: Diesel engine air intake systems
• Function: Air filtration and contaminant control
• Efficiency Test Standard: ISO 5011
• Full-Life Efficiency: 99.99%

⭐ Key Features

• Effective Air Filtration: Captures dust and airborne contaminants before they enter the engine intake system.
• High Filtration Efficiency: The filter achieves a reported full-life efficiency of 99.99% under the applicable test conditions.
• Reliable Airflow Support: Clean intake air helps the engine maintain efficient combustion and dependable operation.
• Primary Filter Protection: Helps reduce the amount of contamination that reaches downstream intake components.
• Furthermore, the cellulose media provides a practical filtration solution for demanding diesel applications.
• In addition, the OptiAir design focuses on maintaining filtration performance throughout the filter’s service life.

⚙️ Technical Insights

The AF25708 works as the primary filtration element in an engine air intake system. As outside air passes through the filter media, the media captures dust and other airborne particles while allowing filtered air to continue toward the engine. Therefore, effective air filtration helps reduce contaminant entry and supports cleaner intake air.
Moreover, restricted airflow can affect engine operation when a filter accumulates excessive dust. For this reason, technicians should inspect the filter according to the equipment manufacturer’s maintenance schedule. Replacing a heavily loaded or damaged filter can help maintain proper airflow and protect downstream engine components.

🛠 Application Scenarios

The AF25708 Air Filter suits diesel-powered equipment that uses a compatible primary air filtration element. Manufacturer information lists AF25708 as a service element for the OptiAir 1300 Series air-cleaner system, and application data covers equipment across multiple markets.
In addition, the filter can support maintenance work on commercial, industrial, construction, agricultural, and other diesel-powered equipment when the application matches the required specifications. Therefore, users should verify the equipment model, air-cleaner assembly, and existing filter number before installation.

📦 Availability

The AF25708 Air Filter appears in current product information as a primary OptiAir air-filter element. Related air-cleaner documentation also identifies AF25708 as the primary element for compatible air-cleaner assemblies.
For correct fitment, please provide your equipment model, engine model, or existing filter number. In addition, our support team can help verify the appropriate air filter for your application.