says it in the vaguest way possible.
do you mean purge the normal air in the top of a keg after you've racked beer into it?
if so, yes. seal the keg, apply 10psi, then vent a moment. re-apply 10psi, vent. apply 10psi, and store for conditioning.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10