... station. Triplex piston single action mud pump for oil and gas well drilling. 1. Power capacity: 37HP-75HP-150HP-220HP- ... crankshaft, back cover, connection rod, crosshead etc. Fluid end includes valve pot assembly, valves, cylinder liners, pistons, discharge manifold and suction ... to prevent the over-pressure, there fixed a shear safety valve in the outlet side of the pump. The gears, bearings, ...