BWQ-160 mud pump is a horizontal, single-cylinder double-acting, reciprocal piston pump. This pump uses the crankshaft and connecting. The main driven system that well-oiled and in high durability is in closed position. The suction valve and the drainage valves are ball check valve. The valves' open and close are reliable and durability. The pump has the advantages of high-duty, moderate pressure, simple structure, easy to maintain, small and light, and so on. It is mainly used for supplying the washing liquid in the drilling of engineering geology. The liquid that the sand-content is less than 5% or non-corrosive effect to the metal and the rubber parts can be supplied by the pump.