Marvin A. Brown - Sewickley PA Richard P. Beverly - Clackamas OR
The F. B. Leopold Co., Inc. - Zelienople PA
An improved cap for underdrains in gravity filters has a top surface and a bottom surface with a plurality of tapered screen members defining slots in the top surface. The slots provide communication with the filter bed without passage of fine grain filter media therethrough. The screen members are inclined with respect to horizontal to define a plurality of raised portions in the top surface, each raised portion defining a distribution chamber above the orifices in the distributor. The cap may be included in a capped filter underdrain block having a plurality of ribs and orifices on a top wall of the block. The cap rests on the ribs and cooperates with them to define distribution chambers above the orifices in the top wall of the block. The distribution chambers promote intermixing of air and water prior to introduction to the bed, and the ribs finely meter backwash fluids for even distribution of backwash fluids throughout the entire filter bed.
Marvin A. Brown - Sewickley PA Gerald D. Wolfe - Zeliepnople PA Richard P. Beverly - Butler PA
The F.B. Leopold Company, Inc. - Zelienople PA
A cap for filter underdrain blocks is provided, wherein the cap has a porous body with a top surface, a bottom surface and downwardly extending flanges. The cap is installed on a filter block having a plurality of orifices in a top wall of the filter block for channelling fluids to and from an overyling filter media. The bottom surface of the cap along with the flanges define a distribution chamber above the orifices, and the cap has a porosity such that a fine grain filter media may be placed directly on the top surface of the cap without media penetrating therethrough and clogging the underdrain blocks. The distribution chamber enhances distribution of backwash fluids throughout the filter media, and the cap eliminates the need for a separate gravel support layer to be installed between the fine grain filter media and the underdrain blocks.
Springhill Medical Center Emergency Medicine 3719 Dauphin St Frnt, Mobile, AL 36608 (251)4605333 (phone), (251)4605295 (fax)
Medical School University of Alabama School of Medicine Graduated: 1987
Dr. Beverly graduated from the University of Alabama School of Medicine in 1987. He works in Mobile, AL and specializes in Emergency Medicine. Dr. Beverly is affiliated with Springhill Memorial Hospital.