APPH have an outstanding track record of designing, developing, manufacturing, assembling and testing fluid filtration applications in the aerospace industry.

Most Rolls-Royce aero-engines use APPH fluid filters, and over 200 airlines in more than 100 countries use APPH filters for optimum protection. APPH also enjoys similar success with many air forces throughout the world.

Our activities cover a complete range of filter elements
• Aero engine fuel and oil systems
• Aircraft hydraulic systems

Together with filter assemblies and manifolds incorporating:
• Pressure differential indicators
• By-pass and other valves

All APPH filters are designed and manufactured by the APPH Filter Division located at Bolton.