Dräger Narkomed 2B, Руководство по обслуживанию, Страница: 189 / 308

NM2B PMC PROCEDURE (continued)
( ) 6.7C SCAVENGER INTERFACE - if applicable
6.7C.1 Scavenger Inspection
6.7C.1.1 Check all scavenger hoses and reservoir bag for deterioration.
Replace all worn components.
6.7C.2 Primary Negative Relief Valve Cleaning:
6.7C.2.1 Remove the plastic valve cover on the front surface of the
scavenger body by turning it in a counter-clockwise direction.
6.7C.2.2 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.
6.7C.2.3 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.
6.7C.2.4 Reinstall the plastic washer and valve into the scavenger body.
Replace the valve cover.
6.7C.3 Secondary Negative Relief Valve Cleaning:
6.7C.3.1 Unscrew the chrome plated valve housing on the left side of the
scavenger body by turning its fitting counter-clockwise with a
wrench.
6.7C.3.2 Unscrew the valve from the housing by turning it in a counter-
clockwise direction.
6.7C.3.3 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.
6.7C.3.4 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.
6.7C.4 Positive Relief Valve Cleaning:
6.7C.4.1 Remove the valve housing on the right side of the scavenger body
by turning it counter-clockwise.
6.7C.4.2 Inspect the rubber O-ring and replace if worn.
Rev. Y
6-11
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