Abstract: A self-aligning poppet valve assembly is disclosed. The self-aligning poppet valve assembly is disposed within the inner wall of a conduit and comprises a movable sealing member having a poppet guide, a seat portion comprising an inner receptacle adapted to receive the moveable sealing member, a sealing flange adapted to contact the moveable sealing member, thereby selectively inhibiting fluid flow past the moveable sealing member, and a guide receiving portion coupled the poppet guide, and a sealing device surrounding the seat portion and adapted to maintain a seal between the seat portion and the inner wall of the conduit.

Abstract: An apparatus for reducing ripple in the flow of a fluid through a positive displacement pump comprises an inlet tube in fluid communication with an inlet of the pump and an outlet tube in fluid communication with an outlet of the pump. A first annulus is in fluid communication with the inlet tube and a second annulus is in fluid communication with the outlet tube. A drive shaft is connected to a main drive shaft of the pump and first and second cams are connected to the drive shaft. The first cam is associated with the first annulus and the second cam is associated with the second annulus. A plurality of pins are provided and each has a portion located within one of the annuluses and an end opposite that portion in contact with the cam associated with the respective annulus.