| 摘要 |
Flow control valve device (5, 10, 40, 50) wherein the rate of fluid flow through the valve is controlled by controlling the ratio of the duration for which the valve is open to the duration for which it is closed. The flow control signal controls the deflection of a piezoceramic bender element (12) which, under a no control signal condition, is effective to prevent fluid flow. The valve is responsive to an electrical voltage signal which can be generated by manual control or by computer control thereby providing a means to efficiently and effectively control, with an electrical voltage, the rate of fluid flow. |
