The model KR is a cast iron continuous backflushing self-cleaning strainer. Featuring a rotating stainless steel backwash arm that is driven by an electric motor, the strainer is designed for installations which will be unattended for extended periods of time. Utilizing a stainless steel Wedgewire straining element, the model KR has the highest straining ratio available for normally sized strainers. When configured for automatic intermittent backflushing— which also reduces backwash effluent— the model KR allows longer periods between backflushing, minimizing operating costs. The Wedgewire element also features a reverse wound design that prevents lodging of debris in the element, and creates a vortex during backflush for more efficient backflush operation. The model KR is the rugged, longlife, efficient self-cleaning strainer of choice.