Xinxiang Filter

Description:

NGS filter cartridges are one of the critical components of aircraft fuel tank inerting systems. The aircraft Nitrogen Generation System (NGS) separates Nitrogen-Enriched Air (NEA) from engine bleed air and fills the ullage space above fuel inside fuel tanks to lower internal oxygen concentration and eliminate explosion risks of fuel tanks. Depending on design, such cartridges may integrate multi-stage filtration functions (particle filtration + oil coalescing + water removal) to fit the NGS requirements of various aircraft models.

Application Fields:

Bleed air pre-filtration for NGS of B737, B757 passenger aircraft

Air pre-treatment for fuel tank inerting systems of wide-body aircraft including B777, B787

Other aircraft adopting membrane separation nitrogen generation technology

FAQ:

Q1: Why do aircraft require nitrogen generation systems?
A: For aircraft fuel tank inerting. The oxygen level above fuel surface is reduced below combustion-supporting threshold to prevent ignition hazards caused by accidental sparks or high temperature.

Q2: What roles do filter cartridges play in NGS?
A: To protect ASM (Air Separation Membrane) hollow fiber membranes, preventing blockage and performance degradation of membrane fibers induced by particles, oil mist, water, ozone and other contaminants in bleed air.

Q3: Replacement interval?
A: In accordance with aircraft manufacturer MPD (Maintenance Planning Document) or ASM differential pressure indication; typical replacement cycle is during C-check or around 8000–15000 flight hours.