Disc Filters, Galaxy 4” Spin Klin Series

General

The Galaxy 4” SpinKlin series are modular, all polymeric, automatic disc filters with a patented self-cleaning backwash mechanism. The 4” Galaxy systems flow rate ranges from 200-2,000 m3/h (880-8,800 gpm) with filtration degrees ranging from 20 – 400 micron and inlet/outlet diameters from 200 - 355 mm (8” – 14”)

Galaxy models:

• 4” Galaxy Batteries
• 4” Galaxy Batteries with external source

The filtration process

The discs are stacked on the SpinKlin spine and assembled according to pre-determined water filtration requirements. During filtration, the discs are compressed by means of a pre-loaded spring and differential pressure, forcing the water to pass through the grooved disc surface, 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.