The filtering process
Discs are stacked on the Spin Klin spine and assembled according to pre-determined water filtration requirements. During filtration, the discs are compressed using a pre-loaded spring and differential pressure, forcing the water to pass through the grooved disc surface and thus trapping the solids.
The backwash process
Activated by either a pre-determined time trigger or differential pressure, the system enters backwash mode. The inlet valve port shuts while the drain valve port opens. During the backwash process, the pressure is released and the spine’s piston elevates, releasing the compression on the discs. Tangential jets of filtered water are then forced through the nozzles positioned along the spine. At this stage the discs spin freely, loosening the trapped solids, which are then flushed out. During the flushing cycle each filter pod is backwashed sequentially, while the others continue to supply filtered water downstream. When a pod begins the backwash cycle, the system valves automatically reverse the flow in the pod, allowing filtered pressurized water to backwash the filter.
External source backwash
When using an external source for backwashing, each filter is backwashed sequentially, while the other filters continue to supply filtered water downstream. In each backwashed filter the inlet and outlet valves automatically close and the drain and external source valves automatically open. Pressurized filtered water from the external source header enters the backwashed filter through its outlet port and backwashes it. Using an external source for backwashing increases the energy available for low operating pressure applications and fine filtration degrees.
Air-assisted backwash (2” Spin Klin systems only)
During the flushing cycle, each filter pod is backwashed sequentially while the others continue to supply filtered water downstream. When a pod begins the backwash cycle, the valves automatically reverse the flow in the pod and open the air valve. This allows compressed air to push the filtered water stored in the accumulator through the backwash manifold and into the filter being backwashed.Each backwash cycle requires a time delay to allow the water tank to be filled with clean water and air, meaning the backwash takes longer than in regular systems. A clean, dry air pressure source is necessary to operate the filtration system (supplied by the customer).
Main benefits
- Enhanced cleaning power, especially on fine filtration degrees
- Lower water volume, reduced backwash time per filter pod (<10 seconds)
- Low-pressure operation
