Filtering Canal, Pond and Recycled Water Without Constant Cleaning

Why dirty water needs a different filter

A screen filter traps contaminants on a single mesh. That is efficient on clean water and unforgiving on dirty water, because once the mesh is blinded the pressure drop climbs and the element needs cleaning — often mid-cycle, when you least want to stop.

Canal, pond and recycled water carry algae and a heavier organic load than a borewell does. If that is your source, the filter has to be chosen for how much dirt it can hold, not only for how fine it filters.

How a disc stack holds more dirt

Where a screen blocks, a disc filter separates. A stack of thin grooved discs traps contaminants in the grooves between them rather than on a flat surface, which gives a far larger filtration area and holds much more dirt before the pressure drop becomes noticeable.

Our 2 inch disc filter is rated at 130 micron, handles up to 40 m³/h at a maximum working pressure of 10 bar, and is the usual second stage after a sand media filter — the media filter takes the bulk of the load and the disc stack catches what gets through.

Servicing between irrigation cycles

Because each disc can be removed, washed or replaced individually, there is no heavy cartridge to discard when the element finally loads up. That keeps running costs down over a season and avoids the situation where a whole filter body is thrown away because one part wore out.

The stack separates with a single clamp, so cleaning fits into the gap between irrigation cycles rather than becoming a job of its own. A differential pressure indicator shows at a glance when cleaning is due, so it is done on the filter's schedule rather than after the block has already under-irrigated.

Specifications at a glance

Common questions

Can a disc filter be the only filter on canal water?

It can, and it will cope far better than a fine screen. On heavily loaded water a sand media filter ahead of it is still the more usual arrangement, because the media filter takes the bulk of the dirt and the disc stack then works as a polishing stage.

How often does a disc filter need cleaning?

It depends entirely on the load in your water. A differential pressure indicator is the honest answer — clean it when the drop reaches the threshold rather than on a fixed calendar, because the load changes with the season.

Do the discs need replacing?

Usually not. They are washed and reused, and replaced individually if one is damaged. That is the practical advantage of a stack over a single cartridge element.