The Arlat MR Multi-Rake Bar screens work by utilizing multiple rake heads attached to
conveyor chains to remove material that has been collected on the submerged static bar
rack. The collected screenings are discharged through a chute on the downstream side of
the screen located above the operating floor.
Arlat manufactures three bar screens; model MR, which utilizes a fixed motor, mounted to
the top of the screen frame, which is driving a chain and sprocket system to move the rake
heads; that removes the material from the bar rack.
The number of rake heads can be varied depending on the cleaning cycle of the specific
application, the MR is a front cleaned, self-cleaning mechanical screens for the separation
and removal of solid wastes from industrial and municipal flow systems, including storm
water/CSO installations
Although the majority of the screen components are manufactured from 304SS, UHMW is
widely used to significantly reduce wear, noise and replacement costs when compared to
competitive machines. There are no rotating drive parts that come into contact with the
liquid.
A variety of options are available to best fit your application:
· 316 Stainless frame and component construction for more corrosive installations
· Bar rack openings range from 1/4” to 2”, custom sizes and shapes are available
· Enclosure panels to protect the operator and minimize odour issues
· Heat tracing for cold weather outdoor installations
· Explosion proof motors and controls for classified locations
· Full PLC control panels are available that can offer;
o Fluid differential monitoring
o Speed control for the screen drive system
o Continuous mode operation during high flow periods
o Full inlet works package integration
Technical Information:
· Rake Head
o ½” 304SS replaceable fingers are used to remove material from the bar
rack
· Bar Rack
o 3/8” x 2-1/2” 304 SS flat bars are used for the static screen
· Conveyor Chain
o Carbon Steel, Stainless steel and no-Lube chains are available
o The upper sprocket shafts are supported by sealed bearings, the lower
sprockets shafts utilize oil impregnated bronze to minimize maintenance.
· Structural frame
o 5/16” 304SS plate is formed to create the side frame
o ¼” 304SS formed into structural member used to further stiffen the frame
o ½” 304SS formed angles to create the mounting feet used to secure the
screen
· Drive Assembly
o .5HP and 1HP motors are typical selections for wastewater applications
o Drives are protected from excessive current and over-torque
Head loss calculators are available to aid in selection of the right combination of channel
size and screening spacing for your application.
