MEDIA FILTRATION OPERATION
Raw water enters media filter through the backwash valve, over
the dual stage water deflector, and through the sand bed. The filtered
water then passes through the gravel pack and is collected through
the stainless steel underdrain and discharged out the bottom.
The superiority of the media filter process is its huge capacity to
entrap particulate matter; the even penetration of water through
the entire sand bed without causing set water channels; and the
non-clogging underdrain. Contact us or call 1-800-360-8380 to speak with an engineer.
BACKWASH OPERATION
The backwash valve is opened by hand or by an automatic valve. This
shuts off the incoming raw water and opens the backwash port to
a near atmospheric condition. Pressurized filter water from adjacent
filter(s) is forced through the stainless steel underdrain, upward
through the gravel pack, expanding the sand bed, forcing the lighter
particulate matter out the backwash line. Reversing the backwash
valve returns the unit to the filter operation.
Everfilt's unique underdrain uniformly filtered water so that
the maximum debris is separated from the sand in the shortest time
period.
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AUTOMATIC VALVE ACTUATION
Valve Actuation is accomplished by using the hydraulic power of the
water source to move or actuate the backwash valve in and out. The
electrical signal from the electronic control energizes a solenoid
valve, which allows the hydraulic pressure of the water source to
push against a piston compressing a spring, opening the backwash valve.
De-energizing the solenoid valve allows the hydraulic pressure to
bleed off of the piston, allowing the spring to expand, retracting
the piston, closing the valve.
Everfilt also manufactures sand filters and multi media filters which remove
suspended solids and turbidity, while media filters typically remove other
types of contaminants present as dissolved substances.
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