Automatic Bernoulli Type Self-cleaning Filter is designed for continuous filtration of water in pressurized systems. It removes debris and particles from natural water sources such as sea water or river water. The AF filter works in BERNOULLI principle, which leads to the simple and highly reliable filtering operation.
BERNOULLI CLEANING PRINCIPLE
The filter element of AF Bernoulli self-cleaning filter is cleaned by the cleaning disc mounted on the pneumatic cylinder rod. When the cleaning action triggered, the disc moves into the filter element and water passes through the gap between the disc and the filter element. Flow velocity increases around the disc and the static pressure around the disc decreases because of the Bernoulli principle. Around the disc edge, the vacuum effect of lower static pressure makes the filtered water back-flush the filter element surface.
THE COMPLETE AF WORKING STAGES
Stage 1.Filtration in the upper 2/3 screen In the lower 1/3 reverse flow takes place as a result of high flow velocities in the filter screen entrance. This causes no impurity deposit.
Stage 2. Filtration in progress The screen starts to gradually get clogged from top to down. Filtration also begins in the 1/3 screen. Reverse flow in the screen entrance area still takes place
Stage 3. Filtration and self-cleaning action triggered 2/3 upper screen gets almost clogged Filtration starts on the whole screen surface The self-cleaning action is triggered by differential pressure
Stage 4. Cleaning and filtration The cleaning discharging valve opened The clean disc keeps still in the initial position The coarse particles are easily washed out of the filter The lower 1/3 screen also takes part in the filtration
Stage 5. Cleaning and continuous filtration The cleaning disc moves down into the screen (down to 2/3) Cleaning takes palce on the screen surface around the disc because of the BERNOULLI principle
Stage 6. the disc moves up and down and cleaned the upper 2/3 screen Reverse flow takes place and cleans the lower 1/3 screen Particles are flushed out. The whole screen is cleaned
TECHNICAL FEATURES AND ADVANTAGES
1) Simple and reliable structure with only two moving parts (Clean disc and discharging valve)
2) Non-contact cleaning, no particle extrusion out of the filter element, efficient filtration
3) Low and consistant pressure drop (even <0.011MPa) both when clean and dirty
4) Very low working pressure requirement down to 0.03MPa
5) Wide flow rate range from 30 to 7000 m3/ h in only one filter unit
6) No filtration interruption when self-cleaning
7) Filtration sizes from 0.1 to 2 mm
8) Easy installation in horizontal or vertical position
FILTER ELEMENT
AF Bernoulli self-cleaning filter has two types of filter elements as the screen [V-SLOT] 100μm~2000μm, slotted and smooth surface, easy to clean, rarely clogged, uniform slots, world-class precision, heavy duty, long service life. [POR] 1000μm~2000μm, micropore surface, smooth internal surface, good roundess.
MAIN SPECIFICATIONS
| Sub-Series | S Series(steel housing),G Series(GRP housing) |
| Working Pressure | 0.03MPa |
| Filtration Rating | 100-2000µm |
| Large Removable Particle | 4mm |
| Design Pressure | 0.6MPa/1.0MPa/1.6MPa/2.0MPa/2.5MPa |
| Design Temperature | 80°C(S Series),60°C(G Series) |
| Flowrate Range | 30-7000m3/h |
| Cleaning Pressure Drop | 0.011MPa |
| Control Mode | differential pressure and time mode |
| Pressure Drop Sensor | pressure drop switch(Standard) or pressure drop transmitter |
| Inlet And Outlet Size | DN65-DN600 |
| Connection Standard |
flange,HG20592-2009(DIN compatible) HG20615-2009(ANSI B16.5 compatible) |
| Filter Element Type |
V-SLOT series slotted screen (100-2000µm) POR series perforated screen(1000-2000µm) |
| Filter Element Material | 316L/SuperDuplex/Ti2 |
| Piston Rod Material | 316L |
| Housing Material | 304/316L/CS/GRP |
| Anti-Corrosion Coating | PA11,Rubber |
| Housing Seals | NBR(Standard)/VITON(FKM) |
| Discharging Valve | Pneumatic butterfly,protection class IP65 |
| Facility Supply |
0.6MPa clean and dry compressed air 110V/220V(Standard)/380V/440V AC,24V DC |
TYPICAL APPLICATION FIELDS
1) Typical applications: water treatment, circulating cooling system, heat exchanger protection, spraying nozzle protection, ballast water treatment system
2) Applicable liquids: underground water, sea water, lake water, river water, circulating cooling water,sewage water, process water, cleaning water
| Contact Person : | rowell |
|---|
