| 摘要 |
<p>PURPOSE:To provide a high sealing effect under a weak tightening force by forming the first sealing having a slide section for the slidable motion of a plunger, and the second sealing housed within a cap nut, and sealing the plunger at two positions under a spring pressing force. CONSTITUTION:Regarding an analyzer plunger pump equipped with a cylindrical cylinder 2 and a plunger 3 reciprocating in a holder 14, a seal means for the slide section where the plunger 3 slides, is formed out of the first sealing 4a with a flange screwed into the holder 14, the second sealing 4b housed within a cap nut 17 coupled to the holder 14, and a spring 16 for pressing the second sealing 4b toward the first sealing 4a. Then, the pressing force of the second sealing 4b due to the pressing force of the spring 16 is converted to a pressing force for the slide section of the plunger 3 via a sealing presser 20 in the nut 17. An effective sealing effect can be thereby provided.</p> |
