D-4
Z MED Medical Air System
4107 9022 67.00
Appendix D - Desiccant Dryer
D.3 Basic Dryer Operation
CD100 - CD300 (See FIG D.3)
Compressed air enters the dryer through the
inlet filter and is directed to TOWER 1 through
a three-way valve (A). The air enters the bottom
of the tower and the dried air exits the tower at
the top and passes through a non-return valve
(B) and after filter (C). A small portion of dried
air is used to regenerate TOWER 2, the dried air
passes through a small orifice (D) into TOWER
2 and is expands to atmospheric pressure. This
extremely dry, low pressure air flows downward
through the tower regenerating the desiccant.
The regenerating air is then exhausted through
a purge valve (E2) and exhaust muffler (F2) to
atmosphere.
After a set time, the “SMART relay” closes the
purge/exhaust valve (E2) allowing TOWER 2 to
repressurize slowly.
At the end of 3 minutes (when operating on a 6
minute cycle), the three-way valve (A) switches
and the purge/exhaust valve (E1) opens to begin
the purge cycle on TOWER 1. The main air flow
is now dried by TOWER 2 while TOWER 1 is
regenerated.
FIG D.3 CD100 - CD300 Flow Schematic
Содержание Z MED Medical Air System
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