V-Series - How it works

Filtration Process

In normal filtration mode, dirty water enters the filter through the inlet (1) and passes through the coarse screen (2) from the outside into the middle of the filtration chamber. The water then flows from the inside of the coarse screen to the inside of the fine screen. It then passes through the fine screen (3) from the inside out. Dirt is collected on the inside surface of the fine screen. The clean filtered water then exits through the filter outlet (4) into the water system.

Flush Mode

Flush Cycle Engages Automatically – Via Pressure Differential

As the dirt or sediment builds up on the inside surface of the fine screen, the pressure drop across the screen increases. When the pressure drop (or differential pressure (DP)) reaches a preset level (7 psi), the filter controller starts a flush cycle by opening a flush valve on the flush line (5). The flush line (5) flushes dirty water from the drive chamber and exhausts the drive chamber to atmosphere at 50kPa.

The "Dirty Water Path"

The drive chamber and the filtration chamber are separated by the drive chamber partition (6).The dirt collector (7) is a hollow pipe with dirt collector nozzles that extends through the drive chamber partition (6), thus providing a "dirty water path" from the dirt collector nozzles (8) through the hydraulic drive (9), into the drive chamber and out the flush line (5).

Suction at the Dirt Collector Nozzles

An aggressive suction is created at the dirt collector nozzles by the difference in pressure between the flush line and the pressure within the filter body. The dirt collector nozzle (8) clearance from the fine screen (3) is less than 5mm and the extremely low pressure at the nozzle opening creates a backflow which "sucks" the dirt from the fine screen (3).

Hydraulic Rotation of the Dirt Collector Assembly

Water from the dirt collector nozzles (8) jets out of the hydraulic drive. The jets create a reaction force (like a pin wheel) which rotates the dirt collector assembly (7). As the dirt collector assembly (7) rotates, each dirt collector nozzle (8) cleans a band on the fine screen (3).

Horizontal Movement of the Dirt Collector Assembly – Back and Forward

Once the dirt collector assembly has rotated to the end of the filtration chamber, the reverser (10) works like the level winder on your fishing reel causing the dirt collector assembly to move back and forth horizontally.

The rotation governor (11) helps control the rotation speed of the dirt collector assembly (7). The balance piston (12) helps balance the transverse pressure on the assembly, and powers the reverser indicator (13) which provides visual indication of the dirt collector assembly (7) movement showing that the entire cleaning system is operating properly during the rinse cycle.

After a preset time, the flush valve closes and the rinse cycle is complete. Very little rinse water is used for each rinse. The system continues to filter water to the system during the rinse cycle.