Five-Unit Netafim Apollo Disc-Kleen Filter Battery
Large orchards, vegetable ranches and nursery ranges pump far more water than a small filter station can handle. This twin battery carries five Apollo filter units for that scale. Together the ten spines give 4,055 square inches of filtration surface. Larger disc rings on longer spines mean fewer units are needed for a given flow. The red 120 mesh discs stop particles down to 130 microns. Water threads through overlapping grooves, so debris is trapped at many points through the stack. Netafim lists a flow range of 850 to 2,000 gallons per minute. At this mesh, good water allows about 1,830 GPM and average surface water about 1,710 GPM. Poor water lowers that to about 1,440 GPM, and very poor water to about 1,170 GPM. Netafim builds the five-unit size from a three-unit twin joined to a three-minus-one twin section. Every component is high-density synthetic material that will not corrode. Chemicals injected upstream will not harm the discs, bodies or valves.
Sizing a Large Agriculture Filter System for Surface Water
Start sizing with the water source rather than the pump alone. Good water is municipal supply or a clean aquifer with no sand, iron or manganese. Average water includes wells with under 2 ppm of sand and clean lakes, ponds and canals. Very poor water covers rivers, muddy canals and raw wastewater. Sources with more than 3 ppm of sand or silt may need a hydrocyclone upstream. Once running, the controller flushes one unit at a time on a timer or pressure difference. Each unit flushes about 20 seconds, then dwells about 5 seconds. A full five-unit cycle sends about 340 gallons to the drain. Each unit draws about 190 GPM at 35 psi during its flush. Keep 30 psi or more downstream, and hold operating pressure at 90 psi or below. Wire the 24 VAC solenoids to a backflush controller, sold separately. Allow time for assembly and a manual flush test before the first irrigation.
Key Features
- Five Filter Units: Ten spines, 4,055 sq in of surface.
- 850-2,000 GPM: Large orchard and ranch flow.
- 120 Mesh Discs: Red discs rated at 130 microns.
- 24 VAC Solenoids: Standard AC controller wiring.
- Modular Twin: Joins smaller sections in the field.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Netafim |
| Item Number | 70661-018501 |
| Model Number | 26ASK4PB5120AC |
| Type | Automatic backflushing filter battery, disc type |
| Configuration | Apollo Disc-Kleen twin, 5 filter units |
| Spines | 10 total (2 per unit) |
| Filtration Surface | 4,055 sq in |
| Filtration | 120 mesh (130 micron), red discs |
| Flow Range | 850-2,000 GPM |
| Max Flow by Water Quality (120 mesh) | 1,830 / 1,710 / 1,440 / 1,170 GPM (good / average / poor / very poor) |
| Inlet and Outlet Manifold | 10 in flanged |
| Drain Manifold | 4 in grooved, installed |
| Solenoids | 24 VAC |
| Max Operating Pressure | 90 psi (standard model) |
| Min Backflush Pressure | 30 psi downstream |
| Backflush Flow | 190 GPM per unit at 35 psi |
| Backflush Volume | 340 gal per flush cycle |
| Flush and Dwell Time | 20 s flush, 5 s dwell per unit |
| Min pH | 5 |
| Materials | High-density synthetic, corrosion-proof; polymeric cover clamps |
| Backflush Valves | Plastic |
| Dimensions (L x W x H) | 107 5/8 x 60 9/32 x 72 9/32 in |
| Assembly | Requires assembly |
| Controller | Backflush controller sold separately |