LPG pump
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We have a Galite liquefied gas pump, model 11G53B with double-end seals. Since last year, a large amount of liquefied gas has been leaking out from the seals when the pump is in operation; the problem goes away once it starts running steadily. What could be causing this phenomenon?
Control the temperature, as well as the flushing of the mechanical seal; the sealing chamber must not overheat, since friction at the end faces generates heat, and when the temperature reaches the vaporization point, vaporization occurs
Agree with the view above; medium vaporization should be the main reason. More solutions should be sought in the process operations themselves; equipment is inert: lol
I think next time, I should turn on the feed line or outlet for a while to allow the liquefied gas to push against the medium, and then thoroughly check the white oil system; that should help improve the situation
There’s one on the 8th floor; let’s exhaust the air first!
After reading the replies above, don’t you empty the liquefied gas pump before starting it there? ! ! (Galite’s liquefied gas pumps are vertical pumps, right?) For pumps used for light hydrocarbons, regardless of their design, it is necessary to fully fill the pump before starting it up. This means evacuating the vaporized medium from the highest point of the pump until the ice in the pipelines begins to melt. At the same time, the pump should be rotated manually a few times to allow any air trapped in the seals to escape. Otherwise, dry friction will occur at the seals, leading to leaks! Once the gas is carried away by the medium, there is no longer any leakage, but this will **reduce the service life of the seal!** !