| 摘要 |
PROBLEM TO BE SOLVED: To provide a horizontal bellows pump enhancing liquid replaceability by switching discharge steps and suction steps.SOLUTION: In a horizontal bellows pump constituted by attaching discharge side check valves 7 for sending liquid A of pump chambers 6 to a discharge passage 1 in a discharge step and suction side check valves 8 for supplying liquid A from a suction passage 2 to the pump chambers 6 in a suction step to a pump head 3 so as to protrude to the pump chambers 6, the valve exit side passages 82 of the suction side check valves 8 are opened toward lower side pump chamber parts 62 being areas directly under the valves 7, and the liquid A is jetted to the lower side pump chamber parts 62 in the suction step, thereby to prevent stagnation of the liquid A in the lower side pump chamber parts 62. |
