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AF424 Primary Air Filter – For Generator Service Companies
AF424 Primary Air Filter – Built for Generator Maintenance Use
This AF424 is one of the compact-sized primary air filters we supply to generator service companies.
Your pictures show the double-mesh structure, which is typically used on filters designed for dusty generator rooms or rental power environments.
The end caps are gray, a color often used by OEM suppliers for Perkins and CAT-pattern air cleaners.
Because this model has no safety element, it is intended to be installed directly as the main filter in the intake system.
Overall Height: 421 mm
Outer Diameter (max): 281.43 mm
Inner Diameter: 170.94 mm
Gasket Included: Yes
Type: Primary element
Structure: Double-layer mesh + HV filter paper
Compatible Part Numbers
PA1862
3I-0373
AT131970
42208E
Application
This AF424 model is widely used by generator repair and maintenance companies, especially for:
Perkins generator sets
CAT industrial engines
OEM-pattern intake housings where a compact primary filter is required
Many of our customers install this filter during scheduled servicing or rental fleet maintenance.
How We Handle AF424 Production
Because AF424 is a small and frequently ordered model, we tend to produce it in batches.
Typical QC steps:
Double-mesh alignment check for uniform airflow
HV media pleat inspection to ensure no broken pleats
Gray end cap sealing test to confirm full PU sealing
Dimensional verification (OD, ID, height)
Random airflow restriction test at 180–240 Pa
This ensures the filter meets field requirements for generator rooms with unstable dust levels.
