209
Introduction to the Autosampler
Sampling Unit
Injection-Valve
The two-position 6-port injection valve is driven by a stepper motor. Only
five of the six ports are used (port 3 is not used). A lever/slider mechanism
transfers the movement of the stepper motor to the injection valve. Two
microswitches monitor switching of the valve (bypass and mainpass end
positions).
No valve adjustments are required after replacing internal components.
Table 43 Injection-Valve Technical Data
Standard Micro Preparative MBB™
Motor type 4V, 1.2A stepper
motor
4V, 1.2A stepper
motor
4V, 1.2A stepper
motor
Seal material Vespel™ (Tefzel™
available)
Vespel™ PEEK
Stator material Ceramic/PEEK Head coated SST PEEK
Number of ports666
Switching time <150ms <150ms <150ms
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