| 摘要 |
<p>A flow control system (200) comprises a substantially rigid vessel (210) having first and second ends, the first end of the rigid vessel (210) having an inlet (114) and an outlet (116), a process fluid reservoir situated in the rigid vessel in fluid communication with the inlet and outlet, a drive fluid reservoir situated in the rigid vessel, a diaphragm (320) positioned in the rigid vessel (210) that separates the drive fluid reservoir from the process fluid reservoir, such that movement of the diaphragm (320) in a first direction causes process fluid to be drawn into the inlet (114) and movement of the diaphragm (320) in a second direction causes process fluid to be expelled from the outlet (116); and a pump in fluid communication with the working fluid reservoir to selectively meter working fluid into and out of the working fluid reservoir, such that metering working fluid out of the working fluid reservoir displaces the diaphragm in the first direction to draw process fluid into the inlet and metering working fluid into the working fluid reservoir displaces the diaphragm in the second direction to expel process fluid from the outlet.</p> |
