Datex-Ohmeda Aestiva 7900 SmartVent, Technical Reference Manual

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7 Repair Procedures
1006-0453-000 05/04 7-19
Figure 7-17 • Gas inlet valve
To service the gas inlet valve (GIV):
Note: You can service the gas inlet valve without removing it from the Vent
Engine.
1. Remove the tube guide plate from the top of the GIV.
2. Remove retaining ring and GIV cap.
3. Remove the shuttle and replace the lower O-ring and the lower U-cup seal.
Lubricate the seal lightly with KRYTOX.
Note
Use pneumatic pressure to remove the shuttle. Cover the shuttle with a soft
cloth and apply pressure (connect the drive gas hose or use pipeline pressure)
through the drive gas inlet.
4. Reinstall the shuttle and upper U-cup seal.
5. Reinstall and lubricate upper O-ring lightly with KRYTOX.
6. Reinstall inlet valve cap.
7. Install the retaining ring flat side out (away from the valve).
8. Reassemble in reverse order.
9. Perform the Checkout Procedure found in Section 3 of the Aestiva
Anesthesia Machine Service Manual.
4
5
6
1
2
3
4
7
8
AB.23.150
AB.23.149
AB.23.148
1. Retaining ring
2. GIV cap
3. O-ring, upper
4. Upper U-cup seal
5. Shuttle
6. Lower U-cup seal
7. O-ring, lower
8. Apply KRYTOX