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Identifying switching valves and active preheaters
The following table lists the features that identify standard and bio system
switching valves and active preheaters.
Note: Tubing contained in the SST or MP35N column tubing kits does not
have an identification sleeve.
Assembling the new fittings
For fitting assemblies with ferrules not previously assembled or set to tubing,
you must mark the compression screw and fitting body, and ensure the two
marks line up when you tighten them.
To assemble the new fittings:
1. Insert the end of a tube into the hexagonal end of the compression screw.
2. Insert the tube into the larger end of the ferrule.
3. Insert the tube into the fitting body.
4. Rotate the compression screw, clockwise, into the fitting body until the
screw is finger-tight.
5. Using a permanent marker, mark the compression screw at the 12
o’clock position.
6. Mark the fitting body at the 9 o’clock position.
7. Ensure the tubing makes contact with the bottom of the fitting body,
and use the 1/4-inch open-end wrench to rotate the compression screw
clockwise 3/4-turn until the two marks line up.
Switching valve and active preheater identification features:
Component
H-Class system
identification
features
H-Class Bio
system
identification
features
I-Class system
identification
features
9-position
switching valve
Stainless steel
valve cartridge,
stator ID = 11
Titanium valve
cartridge, stator
ID = 12
Stainless steel
valve cartridge,
stator ID = 22
Active
preheater
White sleeve,
labeled 316SST
Blue sleeve,
labeled MP35N
White sleeve,
labeled .003
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