| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an easily handleable compact check valve easily assembled into a valve casing by improving a check valve arranged inside a feed piston of a plunger pump as an inlet valve for providing a spring-loaded check valve provided with a valve closing body pressed toward a valve seat in the valve casing by means of a spring member. SOLUTION: A spring holder 34 is arranged inside a valve casing (feed piston) 12, and a spring member 44 is supported by the spring holder 34, while a valve closing body 52 is provided with an undercut part engaging a stopper face 66 of the spring holder 34 from the back side.</p> |
