The Purolator AN6235-3A is a 10-micron aviation-grade hydrocarbon fuel and oil filter element designed for use in aircraft fluid systems such as fuel, lubrication, and hydraulic circuits. It is manufactured to meet MIL-F-5504 requirements and is commonly used in aircraft engine accessory and fuel system filter housings, including applications on turbine engines like the PT6 series.

The element uses pleated Micropleat® or resin-impregnated cellulose media, providing high dirt-holding capacity and efficient removal of fine particulate contamination while maintaining stable flow characteristics. It is designed for full-flow filtration, meaning all fluid passes through the filter media before reaching downstream components.

This filter is a non-reusable consumable element, intended for periodic replacement during scheduled maintenance. It is engineered to operate across a wide temperature range, making it suitable for harsh aviation environments.

Key features include:

Purolator part number: AN6235-3A
Hydrocarbon fuel / oil filter element
Filtration rating: 10 micron
Meets MIL-F-5504 aviation specification
Pleated high-efficiency filter media (Micropleat® / cellulose)
Suitable for fuel, oil, and hydraulic hydrocarbon systems
Full-flow filtration design
Operating temperature range: -65°F to +275°F (-54°C to +135°C)
High dirt-holding capacity with stable flow performance
Replaceable, non-cleanable element
Common use in aircraft engine and accessory filter assemblies
Used in turbine and general aviation fluid systems
Designed for periodic maintenance replacement