| 摘要 |
A multi-stage pump comprises a feed pump (150) having a feed chamber (155) and a dispense pump (180) having a dispense chamber (185). A dispense block (205), which is formed of a single piece of material, defines: at least a portion of the feed chamber (155); at least a portion of the dispense chamber (185); a pump inlet flow path (280); a feed stage outlet flow path (285); a dispense stage inlet flow path (290); a vent flow path; a purge flow path (300, 305); at least a portion of a pump outlet flow path (295); and a portion of each valve of a set of valves (125, 130, 135, 140, 145) to selectively allow fluid flow through the multi-stage pump. A manufacturing method of said multi-stage pump is also disclosed. |
