Aiming at how to reduce the pump noises, a new type of double acting piston radial pump with lower noises is designed here.

The working principle of a new kind of double-acting hand piston pump having two-step output pressure was introduced. The displacement and the output pressure calculating formulae were given.

Mud pump Classification mud sub-single-effect and two types of double acting, single acting mud pump piston reciprocating in a cycle of action only to complete a suction drain.