Elfi SCR O 250-75 Suction Scanner Self Cleaning Filter DN 250 25 to 2000 micron 90-360 m3/hr

Product Description

MAIN TECHNICAL FEATURES
• Flowrate uninterrupted even during washing phase
• Filtration degree from 20 to 5 micron
• Maximum flow rate 260 m3/h with a single filter
• Minimum amount discharge water

APPLICATIONS
• Pre-filtration in UF systems
• Evaporation towers
• Spray nozzle protection
• Heat exchangers

HOW IT WORKS
Water enters the filter through the IN inlet and goes through the filtering cylinder (1) from the inside to the outside. This will retain all non-deformable suspended solids that are the same size or bigger than the filtration degree installed. Filtered water leaves through the outlet pipe (OUT).

REGENERATION
Constant deposit of suspended solid particles inside the filtering cylinder (1) obstructs the passage of water, causing a pressure differential (?P). At a preset ?P value (ranging from 0.2 ÷ 0.4 Bar) an automatic cleaning cycle of the filtering (1) cylinder starts. This activity begins with a signal that opens the discharge valve (2) allowing communication of the suction nozzles (3) with the outside environment. At the same time, the electric motor’s (4) rotary motion allows the nozzles to inspect the entire filtering surface. Dirt is removed through the discharge valve (2). The cleaning cycle lasts 15 sec.

CONTROL
A switchboard controls the washing phases. The signal that starts the cleaning cycle is given by a differential pressure switch or by time. The switchboard gives an “alarm” signal in case of problems in the washing system. These signals can be sent to a pre-existing control centre. The washing phase can also be controlled manually. The solenoid controlling the valve is pneumatic.