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Filter Technical Information
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DESCRIPTION OF OPERATION
As dirty water is pumped into the filter and pressure increases on the outside of the filter element, the water pressure compresses the rings tightly together increasing efficiency.
Grooves in the disc rings criss-cross forming a network that traps both organic and inorganic contaminants from the water source. This design filters the dirty water thoroughly - not only on the outer surface of the cylindrical disc filter element - but through the entire depth of every ring groove. Clean water exits from the inside of the cylinder.
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DESCRIPTION OF OPERATION |
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Filtration
Contaminated water flows from the inlet manifold through the backflush valves and through the filter. The water pressure increases on the outside of the filter element compressing the rings tightly together. Grooves in the rings criss-cross, forming a network that traps both organic and inorganic contaminants from the water source. This design filters the dirty water thoroughly - not only on the outer surface of the cylindrical disc filter element, but through the entire depth of every ring groove. Clean water exits the filter and flows through the outlet valve to the system. |
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Automatic Backflush
A pressure differential switch activates the controller at 7 psi differential. During the backflush cycle, the solenoid closes both valves. Water flows through the bypass filter to the spine in the reverse direction and separates the discs. A specially designed nozzle system inside the filter spine sprays pressurized water against the loosened discs, spinning them clean quickly and efficiently. After backflushing, the stack of discs automatically compress to resume filtration. Dirty water discharges through the flush port. During the backflush time of 20 seconds, there is no water flow to the field. Note: Inspect bypass filter on a regular basis; frequency is based on quality of the water. |
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DESCRIPTION OF OPERATION |
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Filtration
During the filtration process, the filter discs are tightly compressed together by the spring and the differential pressure, forcing the water to flow through the grooves and traps of the discs.
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Backflush
During backflush, the discs are released by the inlet hydraulic pressure. Multi-jet nozzles provide peripheral spray on the loosened discs causing them to spin and release the retained solids, which are flushed out to the drain. |
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DESCRIPTION OF OPERATION |
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During the filtration process, the water flows through the inlet manifold, through the 4 filters and the 4 x 3 inlet valves. The filtered water gathers in the outlet manifold and flows into the system.
The backflush process begins with a signal from the control unit activated by the pressure between the inlet and outlet or by time. The signal is transported to the booster valve assembled on the 4 x 3 inlet valve #1. The booster valve opens causing the #1 valve to close the 4 inlet to the filter and open the 3 drain port. Filter #1 is now in a backflush position.
The 5 spines in Filter #1 operate simultaneously, releasing the compressed discs as jets of water are pumped against the discs causing them to spin and free trapped solids. The filtered backflush water is supplied from the other filters through the outlet manifold. The contaminated water from the backflushed filter drains through the drainage manifold.
Backflush time per filter is between 20-25 seconds. When the time elapses, the control unit stops the backflush signal to the solenoid. The solenoid releases the water pressure signal allowing the inlet valve and the discs of the 5 spines to return to filtration mode. Once Filter #1 is in the filtration position, the control unit sends a signal to begin the backflush process for Filter #2. |
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About Netafim USA 
