What type of valves can be used on large-diameter gas pipelines to achieve effective shutdown over the long term
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This post was last edited by WQC on 2010-8-25 at 19:46. The valves used in our plant’s gas pipelines are mostly cast-iron gate valves; however, solid particles such as coal dust in the gas pipeline can easily clog the grooves at the bottom of these valves, preventing them from closing properly. So, what kind of valves work best for gas pipelines?
You can use the quick-release gas valve; there is a drain outlet below – feel free to contact us for details
The best way is to install a filter on the valve to remove the particles in the gas, thus preventing leaks!
How high is the pressure in large-diameter coal gas pipelines? It is safer to use a water seal and a blind flange.
Why not consider a ball valve?
Of course, you need to specify exactly what the diameter and pressure are; it would be best if the butterfly valve can handle those conditions
I guess you’re using DN 500 or 600 valves. If the size is larger, it’s unlikely you’d still use gate valves – the cost would be too high. I suggest using butterfly valves; many gas plants and power plants use them these days
I think ball valves are a good option; hard-sealed ball valves work well, but their price is too high
The gas pipeline is DN1200 in size; using ball valves would be too costly, and they are also very heavy. It is also impossible to add a filter at the front; the pipe diameter is too large, gas leakage must be prevented, and the pressure is 20 kPa.
We use gate valves for our 600Lb, DN800 gas pipelines; it’s not clear yet whether there are any issues!