In bodies of water where debris accumulates on the screen body, either by gravity or in response to random ambient currents, screens can be cleaned with an airburst system daily, weekly, monthly or any predetermined time specified. Air is preferred for cleaning intake screens because air moves with less head loss than water and creates higher water velocity for effectively cleaning of debris.
1. Accumulator: The high-pressure air receiver. Air supplied by an air compressor. Motor, voltages and configurations are matched to the site.
2. Distributor System: Sends bursts of air to screen(s) in manifold assemblies and sequential bursts are usually sent to each screen with the accumulator recharge between burst. Special assemblies are available for simultaneous backwash of multiple screens.
3. Control Systems: Manually/automatically operated on a timed sequence or automatically operated when screen head-loss exceeds a predetermined value. Both automatic systems have manual overrides.
4. Air Compressor: Specifically sized for each intake to insure the proper distribution of air across the screen.
It is a good practice to incorporate airburst piping in the design stage for an intake screen, even though the airburst system purchase may be deferred or delayed. The air manifold can be uncapped and connected when required.
Information Needed for Accurate Quoting:
Manual/Automatic Valves and Timer
Time Intervals for Bursting
Number of Screens to Burst at One Time
Type of Compressor(s) Required
Distance Between Screen and Receiver
Electrical Service Spec's (Voltage)
Enclosure Rating Spec NEMA
Technical Assistance Requirements
OEM Service Manual (If Required)
Main Components of the Airburst System:
See the Engineering Section for Sample Engineering Specifications & Documents