Abstract: A large, high temperature, cost-effective butterfly valve with provisions for simple internal inspection and repair through a transverse access opening that is substantially smaller than the valve seat opening and which is repairable without necessitating removal of the valve body from the pipeline. A plurality of closure members that span the width of the valve seat opening are positionable in compact manner for removal through the small transverse access opening. A substantially annular seat is defined within the valve by a plurality of seat segments that are disposed in supporting and supported slip joint relation, thus permitting substantial radial expansion and contraction of the valve body without subjecting the valve seat structure to circumferential stresses.

Abstract: The object of the invention is to provide means to connect a valve bonnet with a valve that controls the flow of high temperature fluids such that, no leakage occurs and such that removable assembly may be accomplished without the use of large wrenches and high torques.From the bonnet depends a flange (50) formed so as to encompass the end of the valve body wall (35) so as to allow the end of the flange to be welded to the valve body wall as at (58) so as to seal between the body and bonnet and to withstand fluid and mechanical forces there between and to minimize thermally generated forces there between.The flange is made long enough to allow for a plurality of removals and reattachments and still be sufficiently flexible to relieve thermal stresses between the body and the bonnet.

Abstract: The apparatus of the present invention would relate to an air diffuser assembly which would comprise an aerator body having a plurality of side walls connected to form an enclosure and at least a pair of intersecting angularly oriented side walls forming an air container envelope for retaining an air volume therewithin. It would also have an air inlet adapted to convey air into said air body at the air container envelope, and a plurality of tear-shaped openings being provided in the body below the air container envelope allowing air to discharge air from the body through the tear-shaped openings, with each of the tear-shaped openings providing an upper pointed portion which would minimize the bubble size of air discharged through the openings. The apparatus would also comprise a baffle plate mounted within the enclosure at the air inlet, the baffle plate preventing the short circuit travel of air received by said enclosure to the tear-shaped openings placed on the body adjacent the air inlet.

Abstract: A waste treatment apparatus provides a cylindrical vessel adapted to receive a waste water flow therethrough to be treated. The vessel provides an aeration chamber at the outer peripheral portion thereof, with a desirable generally helical flow being generated by aeration bubbles striking angularly deposed baffle plates. A clarifier is provided at the central portion of the cylindrical vessel for clarifying a liquid which enters the clarifier from the aeration chamber. The clarifier comprises a first settling chamber and a second decant chamber through which clear water is collected and transmitted to a chlorination chamber for subsequent discharge. The angularly deposed baffle plates are mounted in the upper portion of the aeration chamber and aid in spinning waste water in a circular or curved path. Likewise, a pair of aeration diffusers mounted in the lower portion of the aeration chamber near the center of the cylindrical vessel move waste water to be treated upwardly and outwardly in a circular path.