1. Change the direct connection to the angle method
The direct connection is inverted S fluidity, the flow path is complicated, and the upper and lower chambers have many dead spaces, which show the area for the settlement of the medium. Angular connection, the medium seems to pass through a 90°C elbow, with good erosion characteristics, small dead zone, easy to design and streamline. Therefore, when the application of directly connected regulating valve causes slight blockage, it can be changed to angle valve application.
2. Enlarging the throttle gap method
For example, common faults such as liquid particles in the medium or weld penetration and rust that have been eroded in the pipeline cannot pass through the throttle valve port and cause blockage and jamming. It can be changed to a throttle valve with a large throttle valve gap. —The total area of the throttle valve is the valve core and sleeve specifications for window ventilation and opening. The total area of the throttle valve is centralized and not spread over the circle, and common faults can be easily removed by plants. If it is a single or double seat valve, the plunger pump-shaped valve core can be changed to a "V"-shaped valve core, or a sleeve valve.
3. Cleaning method
Welding through, rust, slag, etc. in the pipeline cause blockage or jamming at the throttle valve port, the guiding position, and the equalizing hole wall of the lower bonnet, causing the valve core inclined surface and the guiding surface to cause bruises and scratches, and the raised surface Cause imprinting and so on. This often results from new commissioning of system software and early commissioning after maintenance. It is a commonly used common fault. In this situation, it is necessary to unload and carry out cleaning to remove the slag. If the protruding surface is damaged, it should be ground; the bottom plug should be opened together to wash away the slag that has fallen into the lower valve cover from the equalizing hole and carry out the pipeline Clean. Before commissioning, let the regulating valve be fully opened, and the fluidity of the medium will be included in all normal operations after a period of time.
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