fluorine lining gate valve

How should the electric device of the fluorine-lined valve be selected?

by:Lianke Valve     2022-07-04
How should the electric device of the fluorine-lined valve be selected? The electric device of the fluorine-lined valve is an indispensable device for realizing valve program control, automatic control and remote control, and its movement process can be controlled by the stroke, torque or axial thrust. Since the working characteristics and utilization of the valve electric device depend on the type of valve, the working specification of the device and the position of the valve on the pipeline or equipment, the correct selection of the electric device of the fluorine-lined valve is very important to prevent the overload phenomenon (working torque higher than the control torque) is critical. Usually, the basis for the correct selection of the valve electric device is as follows: Operating torque: The operating torque is the most important parameter for selecting the valve electric device, and the output torque of the electric device should be 1.2-1.5 times the maximum operating torque of the valve. Operating thrust: There are two main structures of the valve electric device: one is not equipped with a thrust plate, and the torque is directly output; the other is equipped with a thrust plate, and the output torque is converted into an output thrust through the valve stem nut in the thrust plate. The number of rotations of the output shaft: the number of rotations of the output shaft of the valve electric device is related to the nominal diameter of the valve, the pitch of the valve stem, and the number of thread heads. It should be calculated according to Mu003dH/ZS (M is the total rotation that the electric device should meet. The number of turns, H is the opening height of the valve, S is the thread pitch of the valve stem drive, and Z is the number of stem thread heads). Stem diameter: For multi-turn rising stem valves, if the maximum stem diameter allowed by the electric device cannot pass through the stem of the equipped valve, it cannot be assembled into an electric valve. Therefore, the inner diameter of the hollow output shaft of the electric device must be larger than the outer diameter of the valve stem of the rising stem valve. For part-turn valves and dark-stem valves in multi-turn valves, although there is no need to consider the passage of the diameter of the valve stem, the diameter of the valve stem and the size of the keyway should also be fully considered when selecting, so that the valve can work normally after assembly.
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