EFM-Series Screens

EFM Series of Internally-fed Rotary Screens are designed for the high flow rate/low solids content of municipal sewage. They are compact units and fully enclosed to contain vapours. The housing is a unitary body of plate and structural members that provides a stable platform for mounting of the screen cylinder. The EFM can use screen media of wire mesh, wedgewire or perforated plate or combinations. Selection of screen filament is based on requirements of the downstream treatment process.

EFM | EFO | EFS | EFU

Operation

The influent enters a headbox, where the energy is dissipated, and the flow is evenly distributed onto the interior sidewalls of the drum. Solids are retained on the screen surface and the liquid flows radially through the screen openings. Splash guards direct the liquid filtrate to a central drainage area, and the solids are transported axially, by lights, to the open end of the drum. The rotation of the drum allows the entire screening surface to be continuously or intermittently washed by a fixed, external, spray bar fitted with a blank of spray nozzles.

Features

• 304 SS construction
• TEFC motor and gear drive
• UHMW polyethylene trunnions shaft mounted
• Internal flights
• External spray bar

EFM-Series Screen Specifications
Model	6mm Screen Opening (gpm)	3mm Screen Opening (gpm)	2mm Screen Opening (gpm)	1mm Screen Opening (gpm)
EFM-1224	150	135	100	75
EFM-2448	620	600	520	440
EFM-3648	1280	1200	1100	900
EFM-3672	3350	2130	1760	1430
EFM-4872	3500	3300	2875	2325
EFM-4896	4450	4200	3840	3680
EFM-60120	7850	7400	6700	5420
EFM-60144	9220	8900	8075	6500
EFM-72160	12200	11500	10800	8750