Tate Andale Model AL and AH Spray-Type Self-Cleaning Strainers arer ecommended for severe operating conditions where the quantity and nature of the debris is such that the standard self-cleaning design is inadequate for effective removal of debris from the surface of the basket. This Variation of the Standard Twin Strainer consists of a spray pipe (Either Fixed or Gearmotor-Driven) located in the center of each basket. Unlike the manual version, liquid flow Is from outside the basket, inward.

To clean a basket, the compartment is isolated by means of manual or electric motor-driven valves, and the drain valve is opened. High-pressure water is then admitted to the spray pipe. The spray pipe nozzles direct jets of water against the inside of the basket, blasting free the debris collected on the outside basket surface. The debris is flushed away through the open drain.

Water for the spray pipes can be taken from the strainer discharge provided the pressure is 50 psig or higher, or from a separate source. There must be no back pressure on the drain line, and the line must be large enough to keep the compartment drained. These strainers are suitable for vacuum or positive pressure operation.