In one aspect of the present invention, this is accomplished by providing a self contained {HEAD ~ seal air and instrument air system} which includes {TAIL ~ a compressor} having an inlet, a discharge, and at least one rotating shaft which has disposed thereon at least one set of seals 
includes
In one aspect of the present invention , this is accomplished by providing a self contained { HEAD ~ seal air and instrument air system } which includes { TAIL ~ a compressor } having an inlet , a discharge , and at least one rotating shaft which has disposed thereon at least one set of seals
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