Control valves

Control valves

Industry: Industrial valves

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Control valves

diaphragm pressure

Industrial valves; Control valves

The proper definition for bench set is the inherent diaphragm pressure range, which is the high and low values of pressure applied to the diaphragm to produce rated valve plug travel with atmospheric ...

dynamic unbalance

Industrial valves; Control valves

The total force produced on the valve plug in any stated open position by the fluid pressure acting upon it. The particular style of valve, i.e. Single-ported, double-ported, flow-to-open, ...

feedback signal

Industrial valves; Control valves

The return signal that results from a measurement of the directly controlled variable. An example would be where a control valve is equipped with a positioner. The return signal is usually a ...

gain

Industrial valves; Control valves

The relationship of input to output. If the full range of the input is equal to the full range of the output, then the gain is 1. Gain is another way to describe the sensitivity of a device.

control valve gain

Industrial valves; Control valves

The relationship between valve travel and the flow rate through the valve. It is described by means of a curve on a graph expressed as an installed or inherent characteristic.

flow characteristic

Industrial valves; Control valves

The relationship between valve capacity and valve travel. It is usually expressed graphically in the form of a curve. Control valves have two types of characteristics inherent and installed. The ...

rangeability

Industrial valves; Control valves

The range over which a control valve can control. It is the ratio of the maximum to minimum controllable flow coefficients. This is also called turndown although technically it is not the same thing. ...