6-way ceramic valve
The 6-way ceramic valve can be used to inject gas-
eous samples onto the column.
The 6 paths of the valve are pneumatically switched
such that 3 paths are simultaneous open in the valve. If
gas is to be injected, an injection volume assembly is
present at one valve path. This is switched into the sam-
ple gas path and is filled with sample. The injection
volume assembly is subsequently connected to the car-
rier gas path. The carrier gas flushes the contents of the
injection volume assembly onto the column.
Technical data
Injection volume 80 µl…4ml
Control gas
- Piping
- Control gas pressure
- Type of control
- Pulse length for switchover
2 x 0.3 mm
3 ... 6 bar
Pulse
0.005 min
Max. carrier gas and sample pressure 4 bar
Max. temperature 180 °C
Number of cycles without maintenance Typically 500 000
Connection pipes
- Length
- Outer diameter
- Volume
200 mm
1.0 mm
40 µl
Dead volume 2 µl
Purging gas 10 ... 20 ml/min
Leak rate: pressure drop with 4 bar H
2
< 50 mbar/sec
Linking of connections
Pressure at connection 1-2 Pressure at connection 1-6
1 connected to 2
3 connected to 4
5 connected to 6
6 connected to 1
2 connected to 3
4 connected to 5
Installation
The ceramic valve has one mounting hole. It is fitted in
the oven using a long screw M4x50.
2 - XII Register8.vp Stand: 20.11.2000
6-way ceramic valve
1-2
Test
hole
Mounting
hole
1
2
34
5
6 1-2
1-6
Purging gas
Mounting
hole
Control gas
Control gas
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