ABF-15000 OL
910101-000320 / 09.2017
Page 9 of 19
DESCRIPTION OF FILTER OPERATION
The automatic ABF-15,000 electric filter is a heavy duty, On-Line filter, which has built in automatic self-cleaning features to
maintain and clean the filter screen during operation. The filter is designed to achieve filtration from 3500 micron to 200 micron
through varying the filter screen size. The ABF-15,000 filter is available in sizes ranging from 14" to 20".
The automatic self-cleaning operation is monitored by the PDS (Pressure Differential Switch) that senses the pressure drop between
the inlet and the outlet of the filter. The PDS is factory preset to start the flushing cycle at 0.5 bar (7 PSI) pressure differential.
Cleaning Process:
When the pressure drop between the inlet and the outlet of the filter reaches the preset value, cleaning of the filtration cylinder is
operated automatically.
This operation consists of opening an exhaust valve (#14) located on the housing lid and starting the electric motor (#20) which
revolves two stainless steel brushes (#7) on the inside of the filtration cylinder (#6).
The particles trapped on the cylinder are dislodged by the revolving brushes and flushed out through the open exhaust valve (#14).
The cleaning operation duration is approximately 15 seconds. The service flow of the filtered water is continuous during the cleaning
cycle.
The electric board that is supplied with the filter controls automatic operation.
Stages of Flushing Cycle:
1.
The P.D. Switch sends a signal to the electric board when 0.5 bar (7 PSI) pressure differential has occurred.
2.
The exhaust valve opens to the atmosphere.
3.
The motor starts rotating the shaft (#7) with the brushes for approximately 15 seconds.
4.
The exhaust valve closes.
Through the self-cleaning process there is no interruption of flow, and the PDS is constantly monitoring the pressure differential
between the inlet and outlet of the filter.
