Two-Screw Pumps are suited to very low available inlet pressure applications. Two-screw pumps offer services such as crude oil pipelining, refinery hot, viscous product processing, synthetic fiber processing and barge unloading. Typical application includes adhesive manufacture, nitrocellulose explosive processing, high water cut crude oil, multiphase pumping and light oil flush of hot process pumping. Two-screw pumps are limited to about 1500 psi. Two-screw pumps are furnished in both lined and unlined construction.
Two-step Turning-in Machines are for accurate placement of the cover on the forming belt. The cover is first placed on the forming belt and oriented so that the head and tail of the cover is turned-in first. A foot pedal activates two opposing pressing rollers that move inward towards each other and wind the forming belt. The forming belt, then upon contact with the boards, causes the cover material to simultaneously turn-in over the boards. The whole operation is then repeated by rotating the cover 90 degrees to turn-in the front and back sides.
A two-way ball valve including a housing having an open interior chamber or space with opposed inlet and outlet openings. The apertured ball seats operatively positioned in the housing at the junctures of the inlet and outlet openings. A ball in the chamber floatingly seated between the ball seats and in liquid sealing engagement. The axial flow bore through the ball being rotatably positionable to open and closed positions. The large bore or opening in the body of the ball in the nature of a side channel intercommunicating the axial flow bore and the interior space in the housing.