Compressor packing leakage issue
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Our company has aZW-type compressor with single-cylinder compression; the outlet pressure is around 5 kilograms. The packing used is of three-leaf type, made of PTFE. The packing does not leak when the compressor is running, but it leaks when the compressor is stopped. We would appreciate it if experienced engineers could analyze the reasons for this phenomenon.
By the way, could everyone please come up with a solution?
To be specific, how does the leakage occur? From where does it leak and to where?
This is normal; if you learn about the sealing principle of the packing in reciprocating compressors, you’ll understand why.
When parking, drain the medium and replace it with nitrogen!
Without back pressure, if it can’t be sealed, there will be leaks; the pressure needs to be released when shutting down
It’s not possible to tighten it when the machine is stopped; what medium is being compressed? Can nitrogen be used to maintain pressure?
With rigid packing, there is no pressure difference on either side when the machine is shut down, so a seal cannot be established
It was designed that way from the start. . .