Penlon AV-S, Service Manual, Page: 90 / 94

APPENDIX
Exhalation Diaphragm Valve
The exhalation diaphragm valve is under the bellows and
can be removed by loosening the three thumbscrews.
The valve seat is now visible.
WARNING
Great care must be taken. Do not damage the precision
surface of the valve seat (D).
Never use any hard object or abrasive agent to clean it;
use only a soft cloth.
If the valve seat is damaged, the diaphragm valve will leak
and may cause serious malfunction.
Clean the seat, and the metal disk (E) attached to the
base of the diaphragm valve, thoroughly and remove all
contamination from the surfaces of both components.
NOTE
If excessive contamination is discovered, check that a bacterial
filter is used in the expiratory limb of the breathing circuit (or an
HME at the patient tee-piece).
After cleaning, check that the small O-ring (F) located in
the bellows base under the diaphragm valve is in place.
The ventilator will not function if the O-ring is missing.
See next page for information on sterilisation procedures.
Refitting
Refit the diaphragm valve assembly to the bellows base
and reassemble the bellows assembly
If a paediatric bellows is fitted, press the adaptor (C) into
the ventilator bellows assembly base, then fit the bellows.
CAUTION
Always check for correct fitment of the bellows (see illustration),
and function test the ventilator before clinical use.
Spirometer Sensors
The sensors are built into the A200SP absorber, and
cleaning and sterilisation can only be carried out when the
absorber assembly is removed for cleaning.
For further information please refer to the user
instructions supplied with the A200SP.
E
D
Exhalation Diaphragm Valve
Assembly
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