What is a disc filter? How does a disc filter work?

Disc filters comprise a series of grooved plastic discs stacked together. Water passes through the pores that are created by the grooves while debris and particles that are larger than the groove size are trapped along the grooves. The s ize of the grooves gives a filtration grade from 25 – 400 microns. Disc filters are an excellent solution for filtering surface water systems containing a high load of organic materials, algae, silt and clay.

How does a disc filter backflush work?

Activated by a predefined command (differential pressure or time), alternate units of the disc filter system go into backflush mode. The inlet valve is shut as the drain is automatically opened. During the backflush process, the compression spring is released and the pressure difference is eliminated. The spine piston rises up , releasing the pressure on the discs. Tangential jets of clean water are pumped at high pressure in the opposite direction through nozzles at the center of the spine. The discs spin free and clear, loosening the trapped solids. Solids are quickly and efficiently flushed out through the drain.

AlphaDisc™
Disc Filter

Lean & Mean Filtration Machine

AlphaDisc™ combines precise depth filtration high dirt-holding capacity, a smart controller for precise performance data, and a unique, easy-to-scale modular design. Adapt your changing flow rate and water needs with ease with Netafim’s AlphaDisc™.

Ensure system longevity with clog and partial clog prevention technology. Enjoy better ROI, cost-savings, and peace of mind with Netafim’s AlphaDisc™.

Make sure you’re making the right decision:

High efficiency, precise depth filtration. AlphaDisc™ leverages a unique design with a precise filtration grade through all depths of the filter meaning better clog protection and more consistent performance.
High dirt-holding capacity. By combining a high filtration volume and area with the lowest head loss in the industry, AlphaDisc™ ensures a higher particle capture rate, fewer backflush cycles, and less disruption downstream.
Hyper modular. The unique, modular design of AlphaDisc™ offers easy scalability as needs evolve.
Low backflush flow rate and low head loss. This results in a lower-cost, higher-yield irrigation system.
AlphaDisc™ smart controller. The “always-on” IP65 rated controller allows consistent access to filtration data.
Multiple configurations. Easily adapt AlphaDisc™ to any system configuration, whether it’s inline, online, or at an angle.
Durable and long-lasting product. Made from anti-corrosive materials.

FAQ

Frequently asked questions

Disc filters comprise a series of grooved plastic discs stacked together. Water passes through the pores that are created by the grooves while debris and particles that are larger than the groove size are trapped along the grooves. The size of the grooves gives a filtration grade from 25 – 400 microns.

Disc filters are an excellent solution for filtering surface water systems containing a high load of organic materials, algae, silt and clay.
Activated by a predefined command (differential pressure or time), alternate units of the disc filter system go into backflush mode. The inlet valve is shut as the drain is automatically opened. During the backflush process, the compression spring is released and the pressure difference is eliminated. The spine piston rises up, releasing the pressure on the discs. Tangential jets of clean water are pumped at high pressure in the opposite direction through nozzles at the center of the spine. The discs spin free and clear, loosening the trapped solids. Solids are quickly and efficiently flushed out through the drain.

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