How can a stuck or blocked fluorine regulating valve be handled?
Overview of the use of a fluorine-lined regulating valve
During the use of a fluorine-lined regulating valve, sometimes due to the principle of the medium, the fluorine-lined regulating valve may get stuck or blocked, making it unable to work properly. In this case, it should be avoided or treated. The following are several methods for reference only:
Cleaning method for fluorine lined regulating valve
Welding slag, rust, slag, etc. in the pipeline causes blockage or jamming in the throttle opening, guide part, and balance hole of the lower valve cover, resulting in scratches and strains on the valve core surface and guide surface, as well as pressure marks on the sealing surface. This often occurs in the early stages of new systems being put into operation and after major repairs. This is a very common malfunction. In this case, it must be removed for cleaning, and removing debris. If the sealing surface is damaged, it should also be ground; At the same time, open the bottom plug to flush out any debris that falls into the lower valve cover from the balance hole, and flush the pipeline. Before putting into operation, fully open the fluorine-lined regulating valve and allow the medium to flow for some time before being put into normal operation.
External flushing method for fluorine lined regulating valve
When using ordinary valves to regulate media that are prone to sedimentation and contain solid particles, they often block the throttle and guide ports. Gas and steam can be externally flushed at 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 regulating valve, so that the valve can operate normally.
Installation of pipeline filter method for fluorine lined regulating valve
For small caliber fluorine lined regulating valves, especially for ultra-small flow fluorine lined regulating valves, their throttling clearance is particularly small, and there should be no residue in the medium. In case of blockage, a filter should be installed on the pipeline in front of the valve to ensure smooth passage of the medium. The fluorine-lined regulating valve used with a locator is not working properly, and the blockage of its gas path throttle is a common fault. Therefore, when working with a locator, it is necessary to handle the air source well. The usual method is to install an air filter pressure-reducing valve on the air source pipeline in front of the locator.
Fluorine lined regulating valve enlargement throttling gap method.
If solid particles in the medium or welding slag and rust that have been washed away in the pipeline cannot pass through the throttling port, causing blockage, jamming, and other faults, throttling components with large throttling gaps can be used – valve cores and sleeves with window or opening throttling areas. Due to their concentrated throttling area rather than circumferential distribution, faults can be easily eliminated. If it is a single or double seat valve, the plunger-shaped valve core can be changed to a V-shaped valve core, a sleeve valve, etc. For example, in a chemical plant, a double seat valve often gets stuck. It is recommended to use a sleeve valve, and the problem is immediately solved.
Fluorine lined regulating valve medium flushing method.
By utilizing the flushing energy of the medium itself, it can flush and remove easily precipitated and clogged substances, thereby improving the anti-clogging function of the valve. Common methods include: ① switching to a flow closed type for use; ② Adopting a streamlined valve body; ③ Place the throttling port in a location with severe erosion, and when using this method, attention should be paid to improving the erosion resistance of the throttling component material.
Fluorine lined regulating valve changed from straight through to angular method.
The direct flow is an inverted S flow, with a complex flow path and multiple dead zones in the upper and lower chambers, providing a place for the precipitation of the medium. Angular connection, the medium flows like a 90 ℃ elbow, with good flushing performance, a small dead zone, and easy to design into a streamlined shape. Therefore, when a direct fluorine-lined regulating valve causes a slight blockage, it can be changed to an angle valve for use.
