85101829 Aviation Hydraulic Filter Unit

Module Feature

85101829 is aerospace-grade inline hydraulic filter assembly. It is installed in aircraft high-pressure hydraulic pipelines to capture solid particulate contaminants in hydraulic oil, protect servo valves, actuators and pumps from abrasion and blockage. Built-in pressure differential bypass valve, when filter element is blocked and pressure difference exceeds threshold, the bypass opens to guarantee continuous hydraulic supply and avoid system loss of pressure. High strength metal housing, resistant to vibration, shock and wide temperature fluctuation, widely used for commercial aircraft flight control, landing gear and thrust reverser hydraulic circuits.

Working principle

Hydraulic oil flows through the pleated filter medium inside the housing, solid particles are trapped on the filter medium. Differential pressure sensor or visual indicator monitors element clogging condition. When the filter element accumulates contaminants, pressure difference rises; once reaching the set value, the bypass valve opens, hydraulic fluid bypasses the filter element directly to maintain system function.

Onboard components

Filter housing, pleated filter element, differential pressure bypass valve, sealing ring, threaded port fitting, differential indicator port.

LED indicators

No built‑in LED indicators. Differential clog status can be displayed by external differential pressure indicator.

Hardware self‑diagnosis

The filter itself has no electronic self-check. The aircraft control system judges clogging fault through differential pressure switch signal. Inspection includes housing crack, seal leakage and medium integrity.

Programming software

No configuration software. The differential alarm signal is collected by aircraft DAU and displayed on cockpit maintenance page.

Electrical & Process Parameters

Model:85101829 Brand:Aerospace OEM Device type:High Pressure Inline Hydraulic Filter Max working pressure:3000 psi Media:Aviation hydraulic fluid Structure:With bypass valve Function:Contaminant filtration for aircraft hydraulic control circuit

Mechanical & Structure

Mounting:Inline threaded connection Protection class:Aerospace hermetic sealed Housing:High strength alloy steel housing

Environmental

Operating temperature:-55℃ ~ +135℃ Storage temperature:-60℃ ~ +150℃ Ambient humidity:5~95% non‑condensing Certification:Aerospace vibration and shock specification compliant Status:Aircraft hydraulic spare filter assembly

Installation

Install inline in hydraulic pipeline following fluid flow marking. Torque threaded connection per aerospace specification, perform pressure leak test. Connect differential pressure indicator line if equipped. Replace filter element when differential clog alarm triggers.

Interface

Threaded hydraulic inlet/outlet interface, optional differential pressure signal interface.

Diagnostic

Differential pressure alarm:Filter element blocked, need replacement. External leakage:Seal ring aging, thread torque insufficient. Bypass valve continuously open:Bypass seat damaged or pressure setting drift.

Product Brief

85101829 aerospace high-pressure inline hydraulic filter, 3000psi rating with bypass valve, removes particulate contamination from aircraft hydraulic oil, protects flight control, landing gear hydraulic servo components.