Donaldson P547520 Safety Air Filter Round 9.37 Inch OD

The Donaldson P547520 is a safety air filter engineered to meet ISO 5011 standards, providing critical protection for heavy-duty engines in commercial vehicles and equipment. This round safety filter features a 9.37-inch outer diameter and 1.57-inch height, designed specifically to serve as a backup filtration element.

Key Features:

• Serves as a backup filter in case of primary filter damage or improper installation
• Prevents contaminants from entering the clean side of the air intake system during primary filter servicing
• Designed to plug rapidly if contamination bypasses the primary filter, alerting operators to potential issues
• Round safety filter media optimized for reliable airflow protection
• Meets ISO 5011 efficiency testing standards for consistent performance

Donaldson recommends replacing safety filters with every third primary filter change unless primary filter failure has occurred. This genuine Donaldson filter provides equivalent or superior performance compared to OEM filters while maintaining engine efficiency and reducing maintenance downtime. Cross-references include Baldwin PA5418, Fleetguard AF27947, John Deere RE181915, NAPA 9520, and Wix 49520.