Take a look at this valve (2)
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Who has used this type of valve, and how was the leakage problem resolved? ? ?
It should be a knife gate valve, right? If there’s a leak, the valve should be disassembled to analyze the problem before anything else is done, right?
For gate valves, it’s mainly a packing leak; just add packing again
The square packing of this type of stem-mounted knife gate valve is the most prone to leakage; using a hidden-stem design would improve things significantly. Or a bushing-type knife gate valve can be used. It depends on the medium you are transporting; if the medium tends to accumulate, it’s better to choose a bushing type.
Is it a knife gate valve as shown in the picture? Which location is leaking? External leak or internal leak?
The medium is flue gas desulfurization circulating slurry, with a pH value of 7-9. The filler often leaks. Could you introduce the cutting techniques using a hidden rod or a bushing?
Pressing on the filler had no effect. In my opinion, the design of this valve structure is unreasonable; it’s strange if it doesn’t leak!
For worm plug valves, the main issue is leakage at the plug seal.
It’s unlikely that the issue lies in an unreasonable design of the structure. In the flue gas desulfurization projects we worked on initially, process packages were used, and knife gate valves imported from abroad were employed; there have been no leaks to date. In recent years, we have carried out a few projects without using process packages, and I haven’t heard of any problems with those either