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  • 2021

    1-6

    There is no specific principle for the assembly method of electric valve actuator, but the motor for electric valve transformation should be horizontal, and the electric assembly machine cover should be horizontal or vertical upward, which is beneficial to lubrication, adjustment, maintenance and manual operation.

  • 2021

    1-6

    The valve stem is connected with the valve core. When the actuator makes a linear displacement, the valve core is driven to move through the valve stem. The upper cover plate is used to compress the packing, and the upper cover plate is connected with the valve body by bolts, which is used for the center positioning of the valve stem and valve core. The valve seat and the upper valve cover are used to ensure the center positioning of the valve core and the valve seat, and change the flow area of the fluid when the valve core moves, so as to change the control variables and realize the function of adjusting the fluid flow. The valve core in the figure adopts top guide mode. Some straight through single seat control valves adopt top and bottom guiding mode to improve guiding accuracy. Some small flow through control valves often use seat guide. Straight through single seat control valve has only one spool and one seat, which is a very common control valve.

  • 2021

    1-6

    In the process of electric actuator, sometimes for some reasons, oscillation phenomenon occurs, and the oscillation frequency may be relatively high. In this oscillation state, it is easy to cause faults, such as magnetic amplifier. In addition, the electric actuator often continues to operate in the oscillation state, which will seriously affect the service life of the mechanism.

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