Filter Assembly General Description (Figure 1)
The A200 SERIES self-cleaning filter enables high quality filtration from grades of 1-3000 micron from various types of fluid sources such as sewage, reservoirs, rivers, lakes, and wells.
The A200 SERIES filter contains the following parts:
6. Electric motor
2. Coarse Screen
7. Cleaning chamber
3. Fine Screen
8. Dirt collector axis
4. Suction nozzle
5. Flushing Valve
Figure 1 – Filter Assembly
Filter Operation General Description (Figure 1)
Water enters the filter through an “Inlet” ① and passes through the coarse screen ② that functions as a “first stop” for rough particles. Water then reaches the fine screen ③, which further purifies the flow by separating smaller particles from the water. As more water flows through, impurities build up on the fine screen ③. As impurities on the screen accumulate, a pressure imbalance is built up between the internal section of the fine screen ③and its external section.
Cleaning of the screen is performed once the pressure loss (ΔP) across the filter has reached the preset value [up to 1.0 bar (14.5 psi)].
The filter is equipped with a ② that protects the ③from stones and larger particles.
The flushing valve ⑤opens and pressure in the flushing chamber⑦ and the dirt collector⑧ is significantly lowered resulting in a suction process via the suction nozzles ④to the dirt collector and from there through the flushing valve ⑤outside. The electric motor⑥ simultaneously rotates the dirt collector and moves it along its axis. The combination of the vertical movement and rotation guarantees that the suction nozzles④ will cover the entire internal screen surface, efficiently cleaning the screen. The whole process takes 12-18 seconds. With clean and filtered water flowing through the “Outlet”⑨.
During the whole process water supply is uninterrupted.