Introduction in this session we are gonna discuss about the parts of control valves DIAPHRAGM CASE Use to enclose the diaphragm to form a pressure chamber, one above the diaphragm and one at the bottom of the diaphragm. The sealing surfaces of the slope away from the diaphragm at the outer edge to insure a pressure …
Working: Check valves are designed to prevent the reversal of flow in a piping system. These valves are activated by the flowing material in the pipeline. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve, the check valve is self-actuating when the flow is …
Small sizes of globe valves fitted with a finely tapered plug are known as needle valves. Needle valves are used to control the flow precisely. Needle valves are used in food industries, pharmaceutical industries where precision is important. Needle valves are also used in some components of automatic combustion control systems where very precise flow regulation is …
A valve positioner is a final control device used to position the valve actuators correctly at the control position. In applying a force to an actuator, there is no guarantee that the actuator is in the correct position. Positioners are used to feedback position information and ensure that the valve is in the correct position regardless …
Introduction The control valve is a controlled device that regulates the flow of a liquid or gas in a system. This regulation is accomplished by the varying resistance that the valve introduces into the system as the valve is stroked. As the valve modulates to the closed position the system pressure drop shifts to the …
