Do the plug valves of air coolers require heat treatment?
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Do the plug valves of air coolers require heat treatment, and how should it be done?
No need; the maximum temperature is only around 110 degrees. There are no special requirements for truly high temperatures either
Plug gaskets are not necessary, but the copper gaskets inside need to be quenched in order to achieve better ductility, which facilitates sealing；
Our company has a dozen or so air-cooled units. After they have been in operation for some time, leaks occur at the areas where the air-cooling fins are sealed. We first tighten those seals or apply sealant; if the leakage remains severe, we stop operations and replace the gasket. We have never seen anyone perform heat treatment before reinstalling the seals. I don’t know if it’s compliant or not; this has always been the way things have been done.