33
Operation
4.2.1 Manifold symbols
4.2.1.1 Mixing coil symbol
Mixing coils are typically constructed with 0.8 mm ID Teflon tubing wrapped on a coil
support. The mixing coil symbol (Figure 29) may also represent a back pressure loop.
Read the notes regarding mixing coils in the QuikChem methods.
The number next to the mixing coil symbol indicates the length of the coil support. The
length of the coil support is measured from hole to hole. The length of Teflon tubing
wrapped on the coil support is specified below the manifold diagram section in each
QuikChem method.
4.2.1.2 Coil support
Refer to Table 6 on page 34 for lengths of tubing needed for wrapping coil supports.
To wrap the support:
1. Insert the tubing in one of the coil support holes. Leave approximately 12 cm of loose
tubing for connecting the coil to any fitting.
2. Start wrapping the tubing on the coil support, being careful not to overtighten.
3. When there is only 12 cm of tubing left, pass the tubing through the other hole. Make
sure the two ends are passed through the holes in the same direction. Refer to
Figure 30.
Figure 29 Mixing coil symbol
[1 in]
25.4 mm
[1 in]
25.4 mm
Figure 30 Coil support
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