Automatic Filters Tekleen MSAF Panduan Pengguna - Halaman 6

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1.3 Theory of Operation

Pressurized water enters the filter inlet and travels through the neck of the filter to

the body. The water then passes through a fine mesh screen where small

contaminants are filtered out. The clean water then exits through the outlet of the

filter.

As more water flows through the filter the screen becomes contaminated. The

accumulation of impurities causes a pressure imbalance on either sides of the

screen. When the difference in pressure (ΔP) reaches 0.5 bar the pin on the

pressure indicator will pop up. This is the optimal pressure differential to initiate a

flush cycle to prevent reduced filter performance. At this time the operator should

initiate a flush but may initiate one at a later time in accordance to an

independent timetable determined by the operator.

To perform the flush, the operator may follow the steps below:

1) Confirm that the dirt collector is in its' fully lowered position by turning the

handle clockwise until it stops.

2) Open the flush valve completely.

3) Turn the handle of the dirt collector counterclockwise until the dirt collector

comes to a stop in the fully raised position.

4) Close the flush valve completely.

When the flush valve opens, water begins to flow out reducing the pressure in

the flush chamber and dirt collector. The drop in pressure allows the nozzle to

generate a suction. The turning of the dirt collector and the spiral axis motion

allows the entire inside of the screen to be suctioned. It should be noted that

even during the flush cycle, the filtration process continues uninterrupted.