In the filter separator is equipped with two different sets of different functions of the filter, coalescence filter and separation filter when the fuel flows through the filter separator, in its internal filtration, coalescence, sedimentation, separation of the four processes.
Jet fuel from the inlet into the filter first-level tray, and then dispersed into the first-stage coalescence filter, jet fuel from the inside out, first through the filter layer filter out solid impurities, and then through the coalescence layer, tiny water droplets Large water droplets, settling on the bottom of the filter, to achieve water separation; oil flow from the outside into the secondary separation filter, the future and the subsidence of the water droplets by the separation of the role of the red water in the jet fuel completely separated, settling in the sump, Drain valve discharge; clean jet fuel through the separation filter pool in the secondary tray. The purified jet fuel is fed from the filter outlet to the aircraft refueling system.
In accordance with the civil airport and military airport regulations: the use of oil depots to the aircraft wing under the fuel filler before the general use of three jet fuel filter separator device.
The main structure of the jet fuel filter separator is mainly composed of shell, end cap, coalescence filter, separation filter, one and two filter tray, inlet and outlet tubing, sampling port, safety valve, bleed valve, differential pressure gauge Institutions, heating devices and other components. The jet fuel filter separator is a filter element with two different functions inside. The outer cylinder is equipped with automatic release valve, drain valve, safety valve, differential pressure meter, on-line sampling probe valve, swing cover mechanism and heating device And other accessories of the metal shell.
The working condition of the filter separator and the working life of the filter are mainly judged according to the pressure difference. When the inlet and outlet pressure difference reaches 0.1Mpa (1.0Kg / c㎡;), the coalescing filter is blocked and should be replaced. In addition, when the use of coalescence filter more than six months should also consider replacement. Separate filter for the permanent filter, if no mechanical damage, long-term use But in the replacement filter filter filter, it should be removed cleaning and inspection.
Filter separator installed, will be able to long-term continuous and reliable work, generally do not open the lid to clean, but usually should pay attention to the following points:
1) timely deflation. For the installation of manual bleed valve filter, in each operation, to be artificial deflation, because the shell if the accumulation of excessive gas, will affect the normal operation of the filter.
2) often put precipitation. After each refueling operation, should be put precipitation, precipitation in the water is normal. If the precipitation is found to have solid impurities, you should identify the reasons and take timely measures.
3) adhere to record pressure. After each operation, should be recorded in the maintenance log filter pressure and fuel throughput, in order to determine whether the filter separator is working properly. If you find a sudden drop in pressure, should immediately stop using, and timely open the lid test to identify the reasons.