AF
AF

Autonomous local filters with autonomous cleaning (pulse purging system) AF are designed for air cleaning from dust. Local filters may be applied both for extension of the existing central aspiration installations and for self-installation on complex equipment based on point filters.


Install local filters to prevent emergency situations!

Autonomous local filters with autonomous cleaning (pulse purging system) AF are designed for air cleaning from dust. Local filters may be applied both for extension of the existing central aspiration installations and for self-installation on complex equipment based on point filters.


Specifications

Filter mark

-

AF-3.KS-200

AF-3.Н-20

AF-6.KS-320

AF-6.Н-50

Filter type

-

local with autonomous cleaning

Capacity on air, min.

m3/hour

900

1800

Relative humidity, max.

%

75

Filter surface area

m2

3

6

Quantity of filter elements

pcs.

2

4

Weight

kg

200

210

250

260

Compressed air consumption, min.

l/min

65

130

Rated power

kW

0,75

2,2

Compresses air pressure, min.

бар

6…6,2

Inlet dust concentration

g/m3

max. 50

Residual dust concentration

g/m3

max. 4

Filter resistance ΔР

kPa

1,1…1,2

Shaking duration

s

0,1…0,2

Pair of elements shaking frequency

min

2…4

If there is a separate compressor for compressed air supply to the unit, air ducts system must be min. 10 m long to perform cooling function.


Structure and Functioning


Contaminated air is fed to the chamber of filters 1, which contains filter elements 2, where dust is settled on their external surface as air passes through the filter material (fig.2). At the same time dust creates so-called additional filter layer that is also important for filtration process.


Purified air flows out of each element into the upper chamber 3, and then through the exhaust fan 4 flows out into the atmosphere. At certain intervals programmed in the controller of cleaning module 5 each pair of elements receives in turn a short-time injection of compressed air from the receiver 6 through the collector 7, valve 8 and corresponding injection tube 9, which has a number of small-diameter holes located opposite to outlet holes of elements. Diameter of these holes and distance from them to element are optimally calculated ensuring forced intake of the significant air amount inside with each injection of compressed air. This leads to powerful short-time change of air flow direction through the filter material, inflating the bag and effectively shaking off a dust layer, which returns to the product flow. Duration of cycles is chosen so, to ensure efficient filtration, prevent product sticking between cartridges and keep filter resistance within acceptable limits.


Covers 10 and 11 allow access to filter elements for their replacement or manual cleaning.