截止阀 （stop valve,Globe Valve）的启闭件是塞形的阀瓣，密封上面呈平面或海 锥面 ，阀瓣沿阀座的中心线作直线运动。

2019年3月7日 · 7-14 隔膜式止回阀 Diaphragm type check valve 该阀是止回阀的一种新的结构形成,尽管它的使用受到温度和压力等的限制,但其防止水击压力比传统的旋启式止回阀小得多

The document discusses different types of final control elements (FCEs) used in industrial processes. It describes gate valves with electric, manual, and pneumatic actuators. Gate valves are commonly used to cut off thick liquids like benzene.

The final control element is the mechanism which varies the flow of the plant medium in response to a signal from the controller. Although it is usually a valve, the final element may be a damper, a louvre, a pump, a motor or any such unit. The correct sizing of this final control element is vital.

截止止回阀（stop-check valve）兼有截止阀和止回阀功能的多用阀门。 它的结构形式与截止阀相似，但阀杆与阀瓣不是固定联接。 当阀杆下降将阀瓣紧压在阀座上时，起截止阀作用；阀杆上升后，则起止回阀作用。

Final Control Element The Mark 37 is a motor-operated control valve that combines a state-of-the-art electronic linear actuator with the exceptional performance of Jordan’s sliding gate valve seat design. The result is a superior degree of accuracy that makes the Mark 37 ideal for use as the final control element in distributed process control

In this chapter, we discuss the fundamentals of final control devices, such as control valves, motors, and pumps. Because control valves are the single most common type of final control element in process control, we will discuss them first and in …

The most common final control element in the process control industries is the control valve. The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point.

2011年1月1日 · During system design, all constituents of the SIS must be addressed, especially the final control element, which consists of the valve and actuator, and any instrument and other accessories that can affect the valve’s movement. Data have shown that the final control element can be responsible for 50% or more of SIS failures.

2021年6月18日 · We can describe the final control element as a component in a control system that would regulate the flow of energy to the process. The final control element would directly determine the manipulated variable value. Mostly the final control element would be a valve and its main purpose is to open and close as per the requirement of the controller.