Replace the Purge Valve Head
When
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Parts required
Qty. | p/n | Description | |
|---|---|---|---|
1 |  | 5067-4236 | Purge valve head |
1 | | 5067-4655 | Capillary ST 0.25 mm x 250 mm |
1 | | G4220-87000 | Capillary ST 0.17 mm x 300 mm |
1 | | 01090-87308 | Capillary ST 0.25 mm x 130 mm |
1 | | 5067-6736 | Biocompatible purge valve head |
1 | | 5500-1420 | Biocompatible capillary MP35N 0.25 mm x 250 mm |
1 | | G7132-60002 | Biocompatible capillary MP35N 0.17 m x 300 mm |
1 | | 5500-1421 | Biocompatible capillary MP35N 0.25 mm x 130 mm |
Prerequisites
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CAUTION
Potential damage of valve head or malfunction of valve
When the pump is switched on, the valve tag is accessed (read/write) and used for correctly positioning the valve.
If the valve head is replaced while the pump is on, invalid information may be written to the valve head making it unusable, or positioning may be wrong resulting in wrong flow connections inside the valve potentially damaging parts.
- Switch off the pump before working on the purge valve.
CAUTION
Bias measurement results
The valve drive contains sensitive optical parts. Pollution of these parts can impair the accurate selection of valve ports and therefore bias measurement results.
- Protect the optical parts from dust and other pollutions.
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Remove all capillary connections.
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Unscrew the black union nut.
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Remove the head of the purge valve by pulling it to the front.
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Put the new valve head onto the valve drive such that the lobe fits to the groove. Screw the valve head onto the valve drive using the union nut.
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Install all flow connections:
Port 1: Channel B
Port 2: Pressure sensor, out
Port 3: Pressure sensor, in
Port 4: Channel A
Ports 5 and 6: Waste capillaries, channels A and B
Port 9: Central port, connected to the Jet Weaver inlet
base-id: 4202249099
id: 4202249099