Perkins CV9685 & CV20948 Air Filters: Applications, Matching Filters, and OEM Supply

In the world of diesel power generation, small parts often play the biggest role in reliability.

Air filters are a prime example: one neglected element can shorten engine life, increase fuel consumption, and trigger costly downtime. For operators of Perkins generator sets, two air filter models stand out—CV9685 and CV20948.

Both are widely used in Perkins engines, and both share the same matching oil and fuel filters, making maintenance more straightforward for fleet managers. In this guide, we’ll explore their applications, dimensions, features, and why sourcing directly from a manufacturer can be a smarter choice.

Common Challenges in Filter Maintenance

Despite their importance, air filters create headaches for operators:

  • Premature clogging – Filters fill up faster in harsh environments, leading to frequent service interruptions.

  • Genuine vs aftermarket confusion – Buyers often struggle to verify whether they are sourcing OEM-grade filters or low-cost copies.

  • Cross-reference overload – The same filter may appear under multiple brand numbers (Perkins, Donaldson, Fleetguard, Baldwin), making purchasing and stock management messy.

These issues highlight why knowing the right part numbers and reliable equivalents matters.

CV9685 Air Filter

    • Application Engines: Perkins 2306C-E14TAG2 / TAG3

    • Size: Outer × Inner × Height = 300 × 199 × 470 mm

    • Features:

      • High-efficiency Ahlstrom/HV filter paper for strong dust capture

      • Aluminum base for corrosion resistance and reliable sealing

      • Reinforced steel mesh for durability under vibration and pressure

    • Use Case: Commonly found on 500 kVA Perkins generator sets, ideal for factories, standby power, and construction sites.

Perkins CV9685 air filter for 2306C-E14TAG2 and TAG3 diesel generator sets

CV20948 Air Filter

  • Application Engines: Perkins 2806C-E16TAG2 / TAG3

  • Size: Outer Diameter 281.6 mm (11.09 in), Inner Diameter 147.9 mm (5.82 in)

  • Features:

    • High-quality PU sealing with uniform foam for reliable fit

    • Large airflow design to meet demands of bigger gensets

    • Durable build suitable for heavy dust and industrial conditions

  • Use Case: Used in 600 kVA Perkins generator sets, often in power plants, mines, and large industrial facilities, as well as in areas lacking stable grid supply.

Use restriction indicators – Saves money and prevents unnecessary downtime.

Perkins CV20948 air filter for 2806C-E16TAG2 and TAG3 diesel generator sets

Matching Oil and Fuel Filters

One advantage of CV9685 and CV20948 is that both use the same matching filters, simplifying inventory management:

  • Oil Filters:

    • CH10929 (Perkins 996-4532)

    • CH10930 (Perkins 996-453)

  • Fuel Filter:

    • CH10931 (Perkins 996-454)

This means operators running mixed fleets with Perkins 2306 and 2806 engines don’t need to stock different consumables—reducing cost and procurement complexity.

Extended Cross Reference

For completeness, related parts include:

  • SEV551F/4 = Perkins 996-690 = CH11038 = Donaldson P781098

  • Compatible with larger Perkins 2806C engines

Such cross references are important for distributors and maintenance teams, helping avoid delays when sourcing replacements.

Why Source Directly from the Manufacturer

While many suppliers sell Perkins replacement filters, sourcing directly from a factory manufacturer like us offers several advantages:

  • OEM-level production: Manufactured with high-quality media (Ahlstrom/HV) and strict dimensional control.

  • Bulk supply & stable stock: Ideal for distributors and generator service companies.

  • Customization: Filters can be OEM-branded with customer logos for private labeling.

  • Factory pricing: More competitive compared to middlemen, reducing procurement cost.

  • Fast lead times: Ready stock for common models ensures timely delivery.

By working directly with the manufacturer, distributors and operators ensure both quality and supply security.

Maintenance Tips for CV9685 & CV20948

From field experience, here are key practices to maximize filter performance:

  • Always replace primary and secondary elements together, if applicable.

  • Never blow out old filters with compressed air—it damages the pleats.

  • Clean the filter housing before installing a new element.

  • Use restriction indicators to monitor filter condition instead of guessing.

Conclusion

The CV9685 and CV20948 air filters are essential for Perkins 2306 and 2806 generator sets. Paired with their matching oil and fuel filters (CH10929, CH10930, CH10931), they form a complete solution to protect engines, reduce downtime, and lower operating costs.

As a professional air filter manufacturer, we specialize in Perkins, FG Wilson, and other diesel generator filters. Whether you’re a distributor, service company, or end-user, we can provide OEM-quality replacements, bulk supply, and fast delivery.

👉 Contact us today to check stock, request a quote, or discuss OEM branding for Perkins generator filters.

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