PACK Sewage Screening (MDV)

The PACK MDV is made up of the following elements: A curved screen SERCOURB, inserted in an above-ground box, having the following characteristics: A sieve screen, curved, removable, made of stainless steel plates laser cut with a 10mm mesh. (Different mesh available on request) Two grid widths are available depending on the discharge flow rates:

• The first can handle a flow rate of 50 to 60m3 / h
• The second accepts flow rates up to 120m3 / h

The scraping system includes:

• Four arms mounted on an axis carried by two stainless steel self-aligning bearings,
• On two ends of the arms, a rubber flap allows the first evacuation of the rejects retained by the grid. These are the largest materials,
• The other two ends are fitted with a stainless steel comb mounted on a retractable support. The comb ensures optimum unclogging of the grid between bars. The articulation with a return by gas spring makes it possible to avoid the blocking of the scraper if an object gets stuck in the grid.
• A geared motor suitable for the MDV application drives the arm in rotation.
• The ejection systemremoves the material deposited on the scrapers or rubber flaps to send them to the jetty chute. This balance is mounted on two stainless steel self-aligning bearings.
• A screw compactor SERCOMP, strongly inclined in order to quickly gain in discharge height. The 300mm diameter Archimedes’ screw ensures a high material flow.

Stone traps:

In standard, to protect the bar screen, a stone trap is integrated directly into the vessel. The filtrate evacuation is made via a tap fitted with a valve, and the pebbles are extracted manually directly into a trash can. Alternatively, the pebble trap can be installed upstream of the stainless steel box. Its bolted lid is equipped with a siphoid blade that breaks the flow and directs the stones to the bottom of the structure where a basket made of perforated sheet metal is laid. It is recommended to handle this basket with a hoist or other lifting tool, as its full weight can be important. The pebble trap is equipped with a drain stitch on its bottom.