Self-cleaning pumps with a high-performance intake filter
Originally designed to overcome blockages when pumping dairy-farm wastewater, this company has developed a submersible pump with an integral self-cleaning intake filter equipped with a backflush rotor. This configuration is said to be a good alternative to a separate suction filter with a surface-mounted pump. It is easy to install because no additional pipe work is necessary. The filtered output protects nozzles and upstream equipment from blockage. Initial offerings were in the 1- to 3-hp range and were designed for use in small irrigation systems, open-loop heat pumps, washwater for sewage works and sample preparation for water analyzers and monitoring equipment. Over the last few years, much larger submersible pumps have been introduced to the series with flows up to 3,000 gal/min and pressures up to 170 psi. Booth 8401 — Rotorflush Filters Ltd., Charmouth, Dorset, U.K.