Abstract: Means and method of straining process streams of liquid-suspended solid particulates includes a primary industrial strainer having means periodically to remove deposited solids by generating a backwash stream. A backwash retention device (BRD) is provided for straining the backwash stream from the primary strainer. Periodically, after a predetermined number of backwash cycles, solids deposited in the BRD are removed by blowing down the BRD, producing a by-product stream more concentrated in suspended solids than the backwash stream.

Abstract: A continuous, self-cleaning strainer and method of straining comprising a housing, a rotatably driven shaft mounted on the housing, a primary and a secondary drum concentrically mounted on the shaft and rotatable therewith, the drums having a number of perforations and strainer inserts mounted in each of the perforations, each drum being provided with a reduced pressure backwash zone outside the drum and connected to backwash outlet connected to atmospheric pressure whereby, when a strainer insert passes the reduced pressure zone, pressurized liquid inside the drum forces liquid backwardly through the insert to flush accumulated solids therefrom. Backwashing operation can be commenced by means of a valve disposed in the backwash outlet lines and actuated by a timer or by a pressure differential switch, or both.

Abstract: A butterfly valve for controlling the flow of high temperature fluids, particularly hot gases, comprises a fluid cooled disc, fluid cooled shafts and a fluid cooled body. The coolant fluid is preferably water. The disc includes a plurality of baffle strips positioned within a hollow interior defining a continuous, serpentine-like coolant flow passageway across the disc for uniform cooling thereof. An outer peripheral edge of the disc carries a resilient high-temperature sealing strip, preferably of a braided Inconel material, for improved gas sealing. The shafts which rotatably mount the disc within the body are hollow and are also cooled by the coolant fluid which is supplied to the disc. The valve body includes a fluid cooling jacket formed adjacent an inner sidewall which forms a seal with the disc along a circumferential surface portion thereof.

Abstract: Apparatus for producing a pressure differential for measuring flow of a gaseous fluid through a conduit of circular cross-section, including a pair of hollow tubes which pass through the wall of the conduit and have open inner ends which are parallel and confronting. Support means are mounted between the tubes which support a circular plate of diameter less than the diameter of the conduit. The circular plate lies in a plane which is perpendicular to the axis of the conduit, and is also parallel to and between the open ends of the tubes. Air or gas passing through the conduit impinges upon the circular plate and causes a measurable pressure differential between the two tubes.