Reciprocating Pump

Abstract

To provide a reciprocation pump with occurrence of water leakage suppressed.SOLUTION: A reciprocation pump comprises a manifold 10 having a pump chamber 11, a valve assembly 50 accommodated in the manifold 10, and a positioning mechanism 60 for positioning the valve assembly 50. The manifold 10 includes a cylindrical space 15 in which the valve assembly 50 is accommodated, and an opening 15c defining an axial end part of the cylindrical space 15. The positioning mechanism 60 includes: a lid 61 that blocks the opening 15c in the manifold 10; and a plug 65 that has a sealing member 66c tightly adhering to an internal peripheral surface of the cylindrical space 15 and that presses the valve assembly 50 to an opposite side to the opening 15c of the cylindrical space 15 with the plug fixed to an inside surface of the lid body 61.SELECTED DRAWING: Figure 2