Available in 20″ model only. The “HH” Hellan Manual Strainers employ six handwheel equipped rotating screens and rigid scraper bars to remove solids from the surface area of the screens when the handwheels are rotated. A solids collecting sump is also provided.
Cleaning of the type “HH” is accomplished by opening a valve on the sump flush connection and rotating the handwheel several times. The cleaning cycle must be performed while the strainer is under positive pressure. Type “HH” strainers are preferably installed in the vertical up-flow position as illustrated.
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