Principle Of Operation - Agilent Technologies 8860 User Manual

2 Introduction

Principle of Operation

Principle of Operation
The Selector connects up to eight sample sources to a multiposition valve. This
valve quickly changes the sample stream to the position specified in the sequence.
Manually controlled needle valves (NV1 and NV2) provide adjustment for the
sampling and purging gas flow rates. In the sample bag version, a downstream
pump draws the sample from the low pressure bag through the GC sampling valve
sample loop. Refer to the flow diagrams below.
Gas Sample Selector (Bag Version)
Sample Bag #1 Filter
Sample Bag #2 Filter
Sample Bag #3 Filter
Sample Bag #4
Filter
Sample Bag #5 Filter
Sample Bag #6 Filter
Sample Bag #7 Filter
Sample Bag #8 Filter
Figure 10 Selector flow diagram for the bag version.
28
Sample
Valve
Actuator
Valve 1
Multi Position
Valve
Agilent Gas Sample Selector for 8860 and 8890 User Manual
Purge
Needle Valve 1
Valve
Actuator
Valve 2
Filter
Pump
Module
Needle Valve 2
GC
Vent
N
2
Actuator Gas