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3.3 Mode of Operation
Filtration Process
During the filtration process the water flows through the inlet manifold, reaching the filters through the
backwash valves. The filtered water flow through the outlet manifold into the system.
Backwash Process
The backwash process begins with a signal from the control unit activated by the pressure difference
between the inlet and outlet or by time.
A hydraulic command is transported to the 3
”x 3” inlet valve No.1 causing the valve
to close the 3
” inlet and open the 3” drain port.
Filter No.1 is now in a backwash mode.
The Spin Klin spine in filter No.1 operate simultaneously, releasing the compressed discs. Tangential
jets of water are pumped against the discs, causing them to spin fast and free, flushing trapped solids
out to the drain.
The filtered backwash water is supplied from the other filters through the outlet manifold.
The contaminated water from the backwashed filter drains through the drainage manifold.
Backwash time per filter is between 20 -25 seconds. When the time elapses the control unit stops the
backwash signal to the solenoid.
The solenoid releases the water pressure signal allowing the inlet valve and the discs of the spine to
return to filtration mode.
Once filter No.1 is in the filtration position again the control unit sends a signal to begin the backwash
process in filter No.2.
A hydraulic command [1], which pressurizes the upper control chamber
[2], forces the diaphragm [3] actuated plug assembly [4] to move
towards the supply port seat [5], eventually sealing it drip tight. This
allows flow from the filter through the drain port seat [6]. Venting the
upper control chamber causes the line pressure, together with the spring
[7] force, to move the valve back to filtration mode.
