Control valves

Control valves

Industry: Industrial valves

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Control valves

vena contracta

Industrial valves; Control valves

The location where cross-sectional area of the flow stream is at its minimum size, where fluid velocity is at its highest level, and where fluid pressure is at its lowest level. The vena contracta ...

installed diaphragm pressure

Industrial valves; Control valves

The high and low values of pressure applied to the diaphragm to produce rated travel with stated conditions in the valve body. The “stated conditions” referred to here mean the actual pressure drops ...

closure member

Industrial valves; Control valves

The movable part of the valve which is positioned in the flow path to modify the rate of flow through the valve. Some of the different types of closure members are the Ball, Disk, Gate, and Plug.

integral seat

Industrial valves; Control valves

The flow control orifice and seat that is an integral part of the valve body or cage. The seat is machined directly out of the valve body and is normally not replaceable without replacing the body ...

installed flow characteristic

Industrial valves; Control valves

The flow characteristic when the pressure drop across the valve varies with flow and related conditions in the system in which the valve is installed. The purpose of characterizing a control valve is ...

seat load

Industrial valves; Control valves

The contact force between the seat and the valve plug. When an actuator is selected for a given control valve, it must be able to generate enough force to overcome static, stem, and dynamic unbalance ...

valve body

Industrial valves; Control valves

The body of the valve is the main pressure boundary. It provides the pipe connecting ends and the fluid flow passageway. It can also support the seating surface and the valve closure member.