Hach-Lange BUHLER 2000 Water sampler - Manual (Page 60)

Spare parts, accessories, circuit diagrams
Page 60 Manual Bühler 2000/1029
Valve system
1. Fixing holes
2. Hose connectors
3. Motor with protective cap
4. Connection cable
5. Pinch bolt
Valve system –front view-
-hose connections-
1. Pinch bolt
2. Pump - pressure
3. Air filter
4. Pump - vacuum
5. Metering vessel
Pressing on areas
Valve system – replacement of hoses-
1. Pull off the hoses leading to the Y-connectors of the valve system.
2. Remove the old hoses of the valve system.
3. Prepare the new hoses.
4. Insert the new hoses according to the position of the old ones.
5. Connect the ends of the Y-connectors with the pump according to the diagram:
2=pressure, 4=vacuum, 5=metering vessel and 3=air filter.
6. Check the correct functioning of the valve system by triggering a manual sample.
Valve system – principle of operation -
Inoperative position / aeration Vacuum Pressure