Screen filters

In general, screen filters are most suited to water that has sediment.

The principal of screen filters is that water passes through a screen from the inside of the screen to the outside of the screen.

Screen filters are either manual, semi-automatic, or automatic.

Automatic screen filters can be either electric or hydraulic. Electric automatic filters have a motor that drives the back-flush mechanism, and subsequently they require mains power (often 3-phase).

Much more common are hydraulic automatic filters, which use the water pressure itself to drive a hydraulic motor. Aside from the controller, which can be battery powered, no external power source is required. However, greater pressure is required for operation compared to electric filters.

Manual screen filter Semi-automatic screen filter Automatic screen filter
Manual screen filter Semi-automatic screen filter Automatic screen filter


How they operate

The screen within the filter provides the filtration barrier.

Naturally, over time, the screen will become clogged with debris.
Semi-automatic and automatic screen filters enable cleaning of the screen without opening the filter.

For automatic screen filters, when a pressure differential reaches a preset point or a timed interval, the filter will back-flush. A back-flush valve is opened, which causes a vacuum through the suction nozzles that rotate within the filter via a hydraulic or electric motor (see image on the right).


Watch an animation of an automated Rivulis screen filter.


Rivulis F6400

A perfect solution for secondary filtration.

It is not always easy to know what type of filter you should use as secondary filtration.

A manual filter means that you generally will not know when it needs to be cleaned. Then, when you do clean, it is significant “manual” work to open the filter and to clean the disc/screen with a hose.

On the other hand, a fully automatic filter is a very high cost for secondary filtration and the amount of back-flushes required.

Rivulis F6400 filters are a great “in-between” option.

Each filter has a clogging indicator – a red indicator that shows when the filter is clogged. Your farm workers can drive by and see easily which filters need cleaning.

Cleaning is also much easier. You simply open the valve and rotate the handle to clean the screen.

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