Netafim 3in LP Disc-Kleen Filter Battery, 4 filters, 120 mesh DC Solenoid

Netafim 3in LP Disc-Kleen Filter Battery, 4 Filters, DC

A filter station at a remote well or canal turnout often has no AC power to run backflush valves. This Netafim battery uses 12VDC solenoids, so a DC controller can manage the flushing from a battery or solar supply. It joins four 3 inch automatic disc filters on a polypropylene manifold, with a flow range of 250 to 600 GPM. Each filter holds a stack of grooved polypropylene discs on a nylon spine. Spring pressure and line pressure squeeze the discs together, and water flows through the grooves and traps between them. That depth filtration catches debris inside the ring, so the stack holds more before it needs cleaning. These red discs are 120 mesh, which Netafim rates at 130 microns. To clean a filter, the controller energizes its solenoid and the backflush valve switches to the drain. Releasing the inlet pressure lets the discs loosen, and multi-jet nozzles spin them clean. Filtered water from the other filters does the flushing, so the field keeps getting clean water. Netafim's LP design backflushes at 30 psi on the standard model. Non-corrosive materials resist both chemicals and weather. The battery comes factory assembled and tested, with a small footprint for tight pump houses.

Setting Up a 12VDC Disc Filter Station

Grade the water first, because that sets how much flow the battery can take. Netafim lists 640 GPM for good water with 120 mesh discs and a little less for average water. Poor water lowers the limit to 450 GPM, and very poor water to 280 GPM. Where sand or silt exceeds 3 ppm, add a hydrocyclone or similar pre-filter. Keep operating pressure between 20 and 90 psi on this standard model. Each filter needs at least 70 GPM to backflush, and a full cycle uses about 94 gallons. Pair the 12VDC solenoids with a DC backflush controller, and confirm the battery or solar supply can handle every flush in the cycle. Connect the inlet and outlet with 6 inch grooved couplings and run the grooved drain manifold to an open drain. Keep water at or below 158 F and pH at 5 or higher. Each solenoid has a manual override for test flushes; hold a filter in backflush for about 20 seconds, then return the knob to auto. Watch the pressure difference across the battery over the first weeks to tune the flush trigger. Open the filters at least once a season to check the disc stacks and O-rings. Replace any disc stack that no longer cleans up in a backflush.

Key Features

• 12VDC Solenoids: For DC or solar powered controllers.
• Four Filters: 250 to 600 GPM range.
• 120 Mesh Discs: Rated at 130 microns.
• 30 psi Backflush: Low pressure LP spine.
• Manual Override: Test-flush any filter by hand.
• Depth Filtration: Holds more debris between flushes.
• Non-Corrosive: Polypropylene, nylon and EPDM build.
• Factory Assembled: Tested and ready to install.

Technical Specifications