Principle

DLHF300 series vertical automatic backwash screen filter

Using a stainless steel screen mesh to remove the silt, sand and scale dirt from the water. Irrigation water containing few organics could also be filtered. The available flow rate is from 30m3/h to 200m3/h. .

Features:

1. Entirely controlled by the hydraulic pressure in the pipeline, external power is not needed.

2. Fully-automatic control

3. Automatic back wash

The water flows through the screen and the particles are retained on the inside of the screen of the filter element. The filtered water then flows out through the outlet.

Self-cleaning mode can be started by pressing, timing or manual three ways, following the principle of pressure difference.
When the internal and external pressure difference reaches the set value,  the self-cleaning mode starts.Drain pipe hydraulic valve open, sucking the scanner to produce negative pressure suction nozzle inside, absorbing impurities, at the same time sucking scanner in under hydraulic motor along the inside surface mesh do reciprocating screw, movement, no cleaning blind area, impurities by the discharge outlet.

The cleaning time of self-cleaning filter is set by the controller in advance, the drain valve is closed after cleaning, and little water loss in cleaning process.