Four-Unit Apollo Disc Filter Battery with DC Solenoids
Field pump stations on wells and canals are often miles from line power. This Netafim battery puts DC solenoids on every backflush valve to suit those sites. Four filter units sit on a twin manifold with a 10 inch flanged inlet and outlet. Each unit holds two long spines stacked with larger red discs. The battery offers 3,245 square inches of filtration surface at 120 mesh, or 130 microns. Debris is caught throughout the grooved disc stack, which stretches the time between cleanings. Netafim rates the station from 700 to 1,600 gallons per minute. Clean well water at this mesh supports about 1,464 GPM. Very poor sources, such as muddy canals, call for staying near 936 GPM. Its light weight and small footprint make it practical on a utility trailer for rotating fields. The assembled four-unit battery weighs about 455 pounds. Synthetic bodies and polymeric clamps will not rust or corrode.
Running the Flush Cycle from Solar or Battery Power
Pair the solenoids with a matching DC backflush controller, which is sold separately. A solar panel or deep-cycle battery can feed that controller at a remote pump. The controller flushes one unit at a time while the others keep supplying the field. During its turn, the discs loosen and clean water jets spin them free of debris. Each unit flushes for roughly 20 seconds, followed by a 5 second dwell. That short cycle keeps flow to the field steadier than a long sand tank flush. A complete cycle uses about 265 gallons of water. Each unit needs about 190 GPM at 35 psi to clean well. Keep downstream pressure at 30 psi or more during flushing. Normal operation should stay at or below 90 psi. Plan time for assembly, then test each valve before the season begins. Release the clamp with a small wrench whenever the discs need a hand check.
Key Features
- DC Solenoids: Battery or solar controller ready.
- Four Units: 3,245 sq in of filtration surface.
- 700-1,600 GPM: Large field and orchard blocks.
- Trailer Friendly: Light, compact twin layout.
- Quick Flush: About 20 seconds per unit.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Netafim |
| Item Number | 70661-018401 |
| Model Number | 26ASK4PB4120DC |
| Type | Automatic backflushing filter battery, disc type |
| Configuration | Apollo Disc-Kleen twin, 4 filter units |
| Spines | 8 total (2 per unit) |
| Filtration Surface | 3,245 sq in |
| Filtration | 120 mesh (130 micron), red discs |
| Flow Range | 700-1,600 GPM |
| Max Flow by Water Quality (120 mesh) | 1,464 / 1,368 / 1,152 / 936 GPM (good / average / poor / very poor) |
| Inlet and Outlet Manifold | 10 in flanged |
| Drain Manifold | 4 in grooved, installed |
| Solenoids | DC (12 VDC) |
| Max Operating Pressure | 90 psi (standard model) |
| Min Backflush Pressure | 30 psi downstream |
| Backflush Flow | 190 GPM per unit at 35 psi |
| Backflush Volume | 265 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) | 87 15/16 x 60 9/32 x 71 9/32 in |
| Weight | 455 lb |
| Assembly | Requires assembly |
| Controller | Backflush controller sold separately |