◇ Enlarge the throttle gap method
If the solid particles in the medium or the welding slag and rust that have been washed away in the pipeline can not pass through the orifice and cause blockage, jamming, etc., you can switch to a throttle with a large throttle gap—the throttle area is open. Valve cores and sleeves such as windows and openings, because their throttling area is concentrated rather than distributed on the circumference, the fault can be easily eliminated. If it is a single or double seat valve, the plunger valve core can be changed to a "V" shaped valve core or a sleeve valve. For example, a double-seat valve in a chemical plant is often stuck. It is recommended to switch to a sleeve valve, and the problem will be solved immediately.
◆ Medium flushing method
Using the scouring energy of the medium itself, scouring and taking away the things that are easy to deposit and easy to block, thereby improving the anti-blocking function of the valve. The common methods are: ① change to flow-closed use; ② adopt streamlined valve body; ③ place the orifice in the place where the scouring Zui is severe, and use this method to pay attention to improving the erosion resistance of the throttle material.
◇ Change straight through to angle method
The straight flow is inverted S flow, the flow path is complicated, and the upper and lower chambers have many dead zones, which provide a place for the precipitation of the medium. Angular connection, the medium is like flowing through a 90°C elbow, with good scouring performance, small dead zone, and easy to design streamlined. Therefore, when the straight-through regulating valve is slightly blocked, it can be changed to an angle valve.
