How the ABF Strainers Work
Amiad’s ABF Series consists of heavy duty automatic filters with an electric self-cleaning mechanism. The five models
of the “ABF” product line range in flow-rates of up to 7200 m³/h (32000 US gpm) with screens ranging from 3,500-200
micron filtration degree.
The Filtering Process
Raw water enters the inside of the screen-cylinder (1) from the filter’s Inlet (2) and flows through the screen to the
filter’s Outlet (3). The dirt particles are trapped on the inner screen surface and formulate a “filtration cake” that
causes a differential pressure across the screen.
The Self-Cleaning Process
During the self-cleaning process, filtered process water continues to flow. The Exhaust Valve (4) opens and the Drive Unit (5) rotates two stainless steel brushes (6) which sweep the inner surface of the cylindrical screen.
The particles trapped on the screen are dislodged by the brushes and flushed out the exhaust valve.
The Control System
The control system is comprised of a Pressure Differential Switch (7) that senses the pressure differential across the screen and sends a signal to the control board when it reaches a pre-defined value (usually 0.5 bar / 7 psi).
The control board initiates the self-cleaning process.
The filter begins a self-cleaning cycle under any one of the following conditions:
1. Receiving a signal from the Pressure Differential Switch
2. Time interval parameter set at the control board
3. Manual Start
Amiad’s “ABF” product-line consists of the following models:
• ABF-3000 for up to 150 m³/h (660 US gpm)
• ABF-6000 for up to 700 m³/h (3100 US gpm)
• ABF-10000 for up to 1000 m³/h (4400 US gpm)
• ABF-15000 for up to 1800 m³/h (8000 US gpm)
• Mega ABF 40000 up to 4000 m³/h (17600 US gpm)
• Mega ABF 60000 for up to 7200 m³/h (32000 US gpm)