Several effective treatment methods for Wear-resistant Ball Valve that are stuck or blocked

Welding slag, rust, slag, etc. in the pipeline cause blockage or jamming in the throttle, guide part, and balance hole of the lower valve cover, causing strain and scratches on the valve core curved surface and guide surface, and indentation on the sealing surface. This often occurs in new systems and in the early stage of commissioning after overhaul. This is a common fault. In this case, it must be removed for cleaning and the slag must be removed. If the sealing surface is damaged, it should also be ground; at the same time, the bottom plug should be opened to flush out the slag that falls from the balance hole into the lower valve cover, and the pipeline should be flushed. Before commissioning, let the fluorine-lined Special Valve fully open, and the medium will flow for a period of time before it is put into normal operation.

When ordinary valves are used to adjust some media that are easy to precipitate and contain solid particles, they are often blocked at the throttle and guide. Flushing gas and steam can be connected to the bottom plug of the lower valve cover. When the valve is blocked or stuck, open the external gas or steam valve to complete the flushing work without moving the fluorine-lined Special Valve, so that the valve can operate normally.
For small-diameter Wear-Resistant Ball Valve, especially ultra-small flow Wear-resistant Ball Valve, the throttling gap is very small, and there cannot be even a little bit of slag in the medium. In case of blockage, it is better to install a filter on the pipeline in front of the valve to ensure the smooth passage of the medium. For Wear-resistant Ball Valve used with positioners, the positioner does not work properly and the blockage of the gas path throttling port is a common fault. Therefore, when working with a positioner, the gas source must be handled properly. The usual method is to install a special air filter valve on the gas source pipeline in front of the positioner. If solid particles in the medium or welding slag and rust washed away in the pipeline cannot pass through the throttling port and cause blockage, jamming and other faults, a throttling piece with a large throttling gap can be used instead - the throttling area is a window-opening or opening type valve core, sleeve, because its throttling area is concentrated rather than circumferentially distributed, the fault can be easily eliminated. If it is a single-seat or double-seat valve, the plunger-shaped valve core can be changed to a V-shaped valve core, or a sleeve valve, etc. For example, a double-seat valve in a chemical plant often got stuck. After it was recommended to use a sleeve valve instead, the problem was immediately solved.
Use the flushing energy of the medium itself to flush and take away things that are easy to settle and clog, thereby improving the anti-blocking function of the valve. Common methods are: ① Change to a flow-closed type; ② Use a streamlined valve body; ③ Place the throttle port in a place where the scouring is severe. When using this method, pay attention to improving the erosion resistance of the throttling material.
Straight-through is an inverted S flow, with a complex flow path and many dead zones in the upper and lower cavities, which provides a place for the precipitation of the medium. Angle connection, the medium is like flowing through a 90° elbow, with good flushing performance, small dead zone, and easy to design into a streamlined shape. Therefore, when a straight-through Wear-resistant Ball Valve is slightly blocked, it can be changed to an angle valve.