Scavenger Inspection; Primary Negative Relief Valve Cleaning; Secondary Negative Relief Valve Cleaning; Positive Relief Valve Cleaning - Dräger Narkomed 2B Service Manual

NM2B
( ) 6.7C SCAVENGER INTERFACE - if applicable
6.7C.1

Scavenger Inspection

6.7C.1.1
6.7C.2

Primary Negative Relief Valve Cleaning:

6.7C.2.1
6.7C.2.2
6.7C.2.3
6.7C.2.4
6.7C.3

Secondary Negative Relief Valve Cleaning:

6.7C.3.1
6.7C.3.2
6.7C.3.3
6.7C.3.4
6.7C.4

Positive Relief Valve Cleaning:

6.7C.4.1
6.7C.4.2
Rev. Y
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Check all scavenger hoses and reservoir bag for deterioration.
Replace all worn components.
Remove the plastic valve cover on the front surface of the
scavenger body by turning it in a counter-clockwise direction.
Remove the valve and washer from the scavenger body by turning
it counter-clockwise. A needle-nose pliers may be used to turn the
valve, but use care not to damage the valve's fragile disk.
Brush any accumulated lint or dust off the valve with a soft brush.
The valve may be further cleaned with a low flow of clean air or
oxygen.
Reinstall the plastic washer and valve into the scavenger body.
Replace the valve cover.
Unscrew the chrome plated valve housing on the left side of the
scavenger body by turning its fitting counter-clockwise with a
wrench.
Unscrew the valve from the housing by turning it in a counter-
clockwise direction.
Brush any accumulated lint or dust off the valve with a soft brush.
The valve may be further cleaned with a low flow of clean air or
oxygen.
Reinstall the valve in the housing, and then reinstall the housing
into the scavenger body. Note: This valve does not require washers
or O-rings.
Remove the valve housing on the right side of the scavenger body
by turning it counter-clockwise.
Inspect the rubber O-ring and replace if worn.
6-11
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PMC PROCEDURE (continued)