Patent ID: 7354256

Claim:
A duplex mud pump, comprising: a fluid end having: two liner blocks, each having a central passage, two fluid inlets disposed on a side portion and two fluid outlets disposed on a top portion; a suction manifold displaced from the two liner blocks, wherein the suction manifold comprises four flanges; four suction valve blocks removably coupled to the suction manifold and the two liner blocks, wherein the four suction valve blocks are configured to manage the flow of fluid from the suction manifold to the two liner blocks, each suction valve block having: a bottom portion removably coupled to one of the four flanges of the suction manifold; and a side portion removably coupled to a fluid inlet disposed on the side portion of one of the two liner blocks; and four discharge valve blocks removably coupled to the two liner blocks, wherein the four discharge valve blocks are configured to control the flow of fluid out of the two liner blocks, each discharge valve block having a bottom portion removably coupled to a fluid outlet disposed on the top portion of one of the two liner blocks.