Abstract: A filtering assembly for removing particles from a liquid is positioned coaxially within a vertical, pressure-tight housing 11 having a tangential inlet 21 at an upper end and an outlet 24 at a bottom end thereof. The filtering assembly includes a filter bag 13 positioned on the exterior surface of a perforated cylinder 14. Untreated liquid from the inlet is filtered as it flows radially inward through the filter assembly. A wash-down device 28 is position at an upper end of the housing for removing solids that have built up on the exterior surface of the filter bag. A controller initiates a wash-down of the filter bag upon detecting a predetermined pressure differential across the filter assembly. After closing the inlet and outlet, the controller opens a vacuum-break valve D causing the filter bag to pulse and thereby initially dislodging entrapped solid particles for easy wash-down.

Abstract: A filtering apparatus for removing solid particles from a liquid which includes a pressure-tight cylindrical housing with a filter assembly coaxially mounted in the housing. A liquid inlet is provided at the upper end of the filter housing and is positioned for tangentially injecting the water to be filtered into the interior of the cylindrical housing for imparting a swirling cyclonic movement to the liquid to be filtered. The liquid is filtered to the interior of the filter assembly and then drains from the bottom of the assembly through an outlet. A drain is also provided in the lower end of the housing for draining off accumulated solids and a wash-down apparatus is provided in the upper end of the housing for directing a wash liquid under pressure against the filtering surface for washing the filtering surface down.

Abstract: An air distribution outlet device is provided having an elongated barrel with an inlet at the top end and a closure at the bottom end. A longitudinally extending wall portion of this barrel is formed with a multiplicity of orifices around the entire periphery for a predetermined axial length thereby permitting transverse outflow of air from the barrel. A flow-control deflector valve is disposed in this intermediate perforated portion of the barrel intermediate the extremes of the axial length of the perforations thereof and this valve is selectively adjustable between a position which is substantially blocking air flow therebelow to a position substantially unrestrictive to the flow of air through the entire perforated portion. This deflector valve may be selectively positioned at any position between the extremes thereby permitting control of the air flow in an upward or downward direction as desired as it is being diffused transversely through the perforations in the barrel.