| 摘要 |
<p>A dense phase pump (402) for particulate material includes a pump chamber (434,436) wherein material flows into the pump chamber (434,436) under negative pressure and flows out of the pump chamber (434,436) under positive pressure. A plurality of pinch valves (480,481) are provided to control flow of material into and out of the pump chamber (434,436). The pinch valves (480,481) are operated independent of each other and of the pump cycle rate. A modular design of the pump (402) is provided.</p> |
