| 摘要 |
Described is a valve that is useful for the accurate control of fluid flowing through the valve. The valve comprises a valve body and a flow control mechanism. In the preferred embodiment, the valve body is a two-part body having a fluid flow section and a valve adjustment section. Necessarily, the fluid flow section has a fluid flow inlet and a fluid flow outlet. The fluid flow section further comprises a fluid flow cavity, which is in fluid communication with the fluid flow inlet and the fluid flow outlet. The fluid flow cavity further includes a flow control orifice area, which flow control surface being smaller in cross-sectional area than the fluid flow cavity in order to reduce unwanted effects such as the venturi and the like. The flow control mechanism has a flow control surface, which works in with the flow control orifice area. Because of its construction the flow control mechanism is able to vary the length of its major axis via a force provided by the valve actuator. As the major axis of the flow control mechanism decreases, the minor axis of the flow control mechanism increases at an amplified rate, said increase in the minor axis of the flow control mechanism accomplishes flow control and in combination with the valve actuator, flow control and fluid modulation.
|
