Irrigation disc filter AlphaDisc™ series

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Overview The AlphaDisc™ is a modular disc filter designed for irrigation systems using surface or reclaimed water. It provides precise depth filtration across the full disc stack, preventing clogging and ensuring uniform water distribution for improved operational reliability and return on investment.

Benefits & features

• Very high efficiency: Disc geometry filters through the full disc depth, achieving consistent solid removal and high dirt-holding capacity.
• Easy maintenance: Large filtration volume and effective particle capture reduce maintenance frequency and minimize backflush cycles and downtime.
• Long lasting: Constructed from durable, corrosion‑resistant materials suitable for challenging field conditions.
• Cost-effective: Low backflush flow requirements and limited head loss lower operational expenses.
• Modular and scalable: Configurable in single, dual, trio, XL and multi-unit (Apollo-style) arrangements to match flow and site constraints.

Models & flow rates

• AlphaDisc™ Single XL 3’’/4’’ — Up to: 90 m³/h (≈ 396 GPM)
• AlphaDisc™ Dual XL 6’’ — Up to: 180 m³/h (≈ 792 GPM)
• AlphaDisc™ Trio XL 8’’ — Up to: 270 m³/h (≈ 1,188 GPM)
• AlphaDisc™ Single 3’’ — Up to: 40 m³/h (≈ 176 GPM)
• AlphaDisc™ Dual 4’’ — Up to: 80 m³/h (≈ 352 GPM)
• AlphaDisc™ Trio 6’’ — Up to: 120 m³/h (≈ 528 GPM)
• AlphaDisc™ in Apollo style (3 units) — Up to: 270 m³/h (≈ 792 GPM)
• AlphaDisc™ in Apollo style (4 units) — Up to: 360 m³/h (≈ 1,056 GPM)

Installation environment

• Suitable as primary or secondary automatic filtration in systems handling surface water with algae, organic matter or high silt loads (reservoirs, canals, rivers, reclaimed wastewater).

How the backflush works Backflush is initiated by a preset differential-pressure or time command. When a unit enters backflush, its inlet valve closes and the drain opens automatically. A compression spring releases, eliminating the pressure differential so the spine piston rises and relieves pressure on the discs. Tangential jets of clean water are pumped through center nozzles in the opposite direction, causing the discs to spin and dislodge trapped solids which are then flushed out via the drain.

What is a disc filter? Disc filters consist of stacked grooved plastic discs. Water passes through grooves while particles larger than the groove size are retained along the grooves. Groove sizes provide filtration grades approximately 25–400 µm. Disc filters are well suited to surface water with high organic load, algae, silt and clay.

Videos & Tutorials (high level)

• Operation and maintenance tutorials: maintenance cycles, flushing valve service, depressurizing the unit, upgrading to XL models, winterization and drain orientation adjustments.

Frequently asked highlights

• Filtration grades by groove size: ~25–400 µm.
• Backflush uses a differential-triggered sequence with tangential jets to spin and clean discs.
• AlphaDisc™ combines modularity, low head loss and compatibility with smart controllers.

Technical specifications

• Brand: Netafim
• Denomination: AlphaDisc™ (series)
• Filtration grade: approximately 25 – 400 µm (dependent on groove size)
• Design: modular disc-stack design; available in single/dual/trio/XL and multi-unit (Apollo) configurations
• Flow capacity (examples): Single 3" up to ~40 m³/h; Dual 4" up to ~80 m³/h; Trio 6" up to ~120 m³/h; Single XL 3"/4" up to ~90 m³/h; Dual XL 6" up to ~180 m³/h; Trio XL 8" up to ~270 m³/h; Apollo 3/4 unit configs up to ~270/360 m³/h
• Materials: durable, anti-corrosive materials for harsh environments
• Backflush: automatic, differential-pressure or time-based activation; tangential high-pressure jets and disc rotation to remove solids
• Applications: surface water systems (reservoirs, canals, rivers), wastewater irrigation, systems with high organic load/algae/silt
• Benefits: high dirt-holding capacity, fewer backflush cycles, lower head loss, reduced maintenance and operating costs