The passive filters for JOHNSON type QUILTON water intakes are manufactured in stainless steel using V-shaped wire to minimise clogging. Each intake is fitted with a compressed air distributor for cleaning.
The passive filters for JOHNSON type QUILTON water intakes are a registered model based on an average through slot velocity of 0.135 m/s (0.15 m/s maximum). The drag on debris is minimised at this velocity.
Furthermore, there is very little impact on local fauna and flora given the weak suction effect around the passive filter for water intakes (research undertaken in the United Kingdom, which is available upon request).
The good distribution of this suction is achieved thanks to modulator pipes and the optimum choice of filtering length.
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Each intake is supplied with lifting lugs for installation and possible re-installation.
We recommend leaving a space equal to at least one diameter around the horizontal axis of the passive filter for the water intake. Likewise, minimum water level must be more than half diameter above the screen.
Removable ends can be deployed (with hinges, bolts or similar) for yearly mechanical cleaning, for example.
The head loss through an unobstructed JOHNSON type QUILTON intake is less than 20 cm . of water column.
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