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TIMEX - Model TBF Series -Automatic Water Filters
TIMEX TBF Series consists of heavy duty automatic filters with an electric self-cleaning mechanism. The five models of the “TBF” product line range in flow-rates of up to 7200 m³/h (31700 US gpm) with screens ranging from 3500-200 micron filtration degree.
The Filtering Process
Raw water enters the inside of the screen-cylinder from the filter’s Inlet and flows through the screen to the filter’s Outlet. 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 opens and the Drive Unit rotates two stainless steel brushes 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
The control system is comprised of a Pressure Differential Switch 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:
- Receiving a signal from the Pressure Differential Switch
- Time interval parameter set at the control board
- Manual Start
- Heavy duty filter for high loads of suspended solids and high flow-rates
- Durable electrically driven revolving-brush cleaning mechanism
- Automatic flushing according to pressure differential and/or time
- Option for continuous flushing
- Low pressure operation, suitable for 2 bar (30 psi) and lower
- No interruption of downstream flow during flushing