| 摘要 |
A Pump consisting of a pressure vessel ( 50 ), an inlet nozzle ( 51 ), an ejector nozzle ( 52 ) by which vacuum and pressur are applied, and an outlet nozzle ( 53 ). The inlet and outlet nozzles ( 51, 52 ) are selectively closed by interconnected knife gate valves, operated in tandem by a pneumatic cylinder whereby when one valve is closed, the other is open an vice-versa. An ejector valve located in the ejector nozzle ( 52 ) alternately creates vacuum and generate air flow through the vessel ( 50 ). The air from the ejector is introduced into the discharge line after closure of the outlet valve.
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