Hach QC8500 Series 2 - Flared Tubing Connections;Switching Valve Connections; Flow Cell Connections

38
Operation
4.3.2 Flared tubing connections/switching valve connections
The switching valve is a manual valve designed to direct the flow in the manifold. Some
manifolds that include a column (e.g., cadmium column for nitrate reduction) may have
this type of valve.
A flared tubing connection requires flared tubing 0.5 mm ID from the switching valve flare
kit (Catalog No. 50962). The valve connector is shorter than the tube connector. Refer to
Figure 38.
To make a connection with the valve:
1. Slide a metal washer on the flared tubing, then a valve connector. Make sure the
threads of the connector face the metal washer.
2. Screw the connector into the valve and finger-tighten.
4.3.3 Flow cell connections
Flow cell connections are a combination of the connections described in section 4.3.2.
To make flow cell connections:
1. Slide three O-rings over a flow cell flare.
2. Insert this flare into a flow cell connector so the threaded end faces the O-rings.
Refer to Figure 39.
3. Screw the connector into the flow cell and finger-tighten.
Figure 38 Connecting flared tubing
1 Tubing 4 Flare
2 Valve connector 5 Switching valve
3 Metal washer
5
1
3
4
2
Figure 39 Flow cell connection
1 Flow cell connector 3 Flare
2 Flow cell 4 O-ring (3x)
1.000
OS
1 2
3
4