| 主权项 |
1. A diaphragm pump for pumping a process fluid, the diaphragm pump comprising:
a pump housing having an outer wall; an inlet region within the pump housing into which process fluid flows in an inlet direction; an outlet region within the pump housing from which process fluid flows out in an outlet direction, the outlet region being separated from the inlet region by a separating boundary; a pumping zone that is separated from the inlet region by at least one inlet valve, and from the outlet region by at least one outlet valve, the pumping zone being partially bounded by a flexible diaphragm; a bypass valve that penetrates the separating boundary, the bypass valve being configured, when open, to allow process fluid to flow from the outlet region into the inlet region; a bypass spring having a proximal end and a distal end, the proximal end of the bypass spring being in pressing communication with the bypass valve; and a support insert having a top end in pressing communication with the distal end of the bypass spring, the support insert being held in position within the housing by the bypass valve spring and by positioning elements that abut the support insert without attachment thereto, each of the positioning elements being unitary with a structural element within the pump housing that is required for pumping of process fluid from the inlet region to the outlet region. |
