The welding slag, rust and slag in the pipeline are blocked or blocked in the throttle orifice, guide part and the balance hole of the lower valve cover, resulting in the spool surface, the guide surface strain and scratch, and the sealing surface indentation. This often happens in the early stages of transport after a new transport system is put in place and after a major overhaul.
This is a common failure. In this case, it must be disassembled and cleaned to remove the slag. If the sealing surface is damaged, it should be polished; At the same time, open the bottom plug, wash away the slag that falls into the lower valve cover from the balance hole, and flush the pipeline. Before transportation, the fluoride regulating valve is fully opened, and the medium flows for a period of time before being included in normal operation.
When the ordinary valve adjusts some media that are easy to precipitate and contain solid particles, it is often blocked at the throttle and guide, and the gas and steam can be washed outside the blockage at the bottom of the valve cover. When the valve is blocked or stuck, the external gas or steam valve can be opened to complete the flushing work and make the valve operate normally without moving the fluorine regulator. For small diameter fluorine-lined regulating valves, especially ultra-small flow fluorine-lined regulating valves, the throttle gap is particularly small, and there can be no slag in the medium.
If clogged, valve manufacturers remind to install a filter on the pipe in front of the valve to ensure the smooth passage of the medium. Fluorine-lined regulator valves with positioners are a common failure because the positioners are not working properly. Valve manufacturers remind that you can use the throttle parts with large throttle clearance - the throttle area is the opening window and the opening valve core and sleeve. Because the throttling area is concentrated rather than circular, the fault can be easily eliminated. If it is a single seat valve or two seat valve, the plunger spool can be changed to a "V" port spool, or to a sleeve valve.
