| 摘要 |
<p>A flow control and flowmeter device has been invented whereby both flow control and flowmetering can be achieved over a wide range of flowrates and pressures. Both accurate flow control and flowmetering are supported substantially free from error due to upstream and downstream pressure fluctuations. Additional features include external flowrate indication (104) and a direct rate adjustment whereby the entire flowrate range is encompassed within a single turn of the flowrate adjustment shaft (62). A pointer (74) is attached to the flowrate adjustment shaft (62) thereby making direct rate setting possible. Innovative spring system (40, 42, 48, 53) and seal designs (60, 68) result in accurate and repeatable flowrate adjustment. The reduction in operating time, the wide range of flowrates and pressures and the accuracy of the device make it attractive in many applications.</p> |
