Parker PNEUDRI MXLE Guia Del Usuario página 6

Vacuum Assisted Regeneration
The exhaust valve is closed once side B is fully depressurised.
The vacuum pump valve is opened allowing a strong vacuum to
be pulled in side B. Under vacuum a continuous flow path now
exists from the purge orifice at the top manifold to the vacuum
pump valve.
A total vacuum can never be pulled during this operation as
there is purge air entering column B at the top manifold.
Wet Air In
Re-pressurisation
On completion of the regeneration phase, Side B must be
pressurised prior to changeover. The vacuum pump valve is
closed and side B is pressurised by the purge air entering
through the purge orifice and the Quick Re-pressurisation Valve
(QRV).
Note. The vacuum pump valve is closed prior to change-over to
prevent damage to the vacuum pump.
Wet Air In
4
Wet Air Valve Open
Wet Air Valve Open
Online
Valve Closed Dry Air
Online
Valve Closed Dry Air
Exhausting
Dry Air Out
Exhausting
Dry Air Out