FILTERAUTOMAT (DDF)
The Filterautomat boasts an extremely robust design and excellent backwash performance. The rotating filter drum distributes any solids uniformly over the entire filter surface and filters them out effectively.
TECHNICAL DATA
Flow rate max. 10,500 m³/h
Filter fineness: ≥ 25 μm
Operating pressure: 0.8 to 63 bar
Flanges: DN 50 to 1,000
Automatic cleaning: Yes
Filter housing: Cast iron, steel, stainless steel
Inline design: Yes
ADVANTAGES
- High cleaning speed (4-10 m/s)
- 100% cleaning of the entire filter area
- Shredding of coarse particles
- Fine filtration ≥ 25 μm possible
- Uniform feeding of the entire filter area
- Fitted with wedge-wire screens or wire mesh
- Inline design
- Completely wired and tested unit
HIGH PRODUCTIVITY
The raw water enters the filter via the inlet flange and is distributed in the outer ring of the housing. Then the raw water rises upwards in the filter housing and flows into the three-part filter drum. In order to guarantee a uniform feed of solids on the filter element, the filter drum rotates at about 5-7 rpm. The solids in the raw water are retained in the segment-like openings on the outer part of the filter drum located on the outside of the filter element. The purified water leaves the filter through the clean water outlet.
BACKWASHING
A differential pressure measurement made between the raw water inlet and clean water outlet determines the degree of contamination of the filter element. At a defined differential pressure, the backwash process is activated. An adjustable time relay in the electrical control system additionally enables the backwash process. At the start of filter cleaning, the motor-driven backwash valve opens, generating atmospheric pressure in the backwash line and the flushing channels in the filter housing. Due to the excess pressure inside of the filter drum on the clean water side, the solids retained on the outside of the filter element are now forcibly backwashed into the atmosphere against the direction of filtration. The rotation of the filter drum past the flushing channel guarantees the 100% cleaning of the filter basket. The flushing process is complete after 15-20 seconds and the backwash valve is closed automatically. Filtration is not interrupted during backwashing.
