Backflush Cleaning Cycle

Backflush cleaning reverses flow through part of the screen to dislodge the filter cake. A valve sequence isolates and reverse-flushes each segment in turn, lifting accumulated solids off the element and carrying them to drain — effective for finer screens where a scanner alone is insufficient.

Backflush self-cleaning — a reverse-flow pulse focused on a screen segment that lifts the cake off and flushes it to drain.

Automatic self-cleaning filters protect downstream equipment by removing suspended solids continuously, cleaning their own screens without interrupting flow. They are specified by screen rating (the micron retention), the design flow and pressure loss, and the cleaning mechanism — and the art is matching all of these to a duty that may swing widely in solids load.

Screen rating sets what is captured: a coarser rating passes more but protects only against larger particles, while a fine rating protects sensitive equipment at the cost of more frequent cleaning. The screen material and construction — wedge-wire, weave or perforate in appropriate alloys — must withstand the differential pressure and the chemistry of the stream over its life.

Cleaning is triggered by accumulated differential pressure across the screen or by a timer, and executed by a backflush or a suction-scanner that traverses the element, drawing the captured solids off a small area at a time while the filter stays online. Sizing balances the clean-screen pressure loss against the dirty-screen trigger point and the backflush volume, so the filter protects equipment without itself becoming a bottleneck or wasting water on over-frequent cleans.