Compressor, exclusion from PED

[Eastend]

Does anybody know why compressors are excluded from EU Pressure Equipment Directive?
I assume equipment of any physical energy source may be deemed as the exclusion described in Article 1, 3.10, but still not sure.

Thank you for advice.
Eastend

 

Go to

http://europump.org/

and read the position paper that this organization presents. They reach a similar conclusion.