EXCELL provides liquid and dry polymer feeders. The EXCELL Liquid Feeder has a patented motorless polymer activating apparatus that compensates for solution flow changes. It assures that the polymer activation energy levels remain adequate for all solution flow rates. Liquid feeders are available with peristaltic, diaphragm, or progressive cavity pumps. Most liquid feeders are available for FREE 30 Day Trial. The EXCELL Dry Feeder is simple, compact, and reliable. Modular design can be adapted to new or existing facilities. Feeder is available with or without tanks.