M&C TechGroup SP2000H_DIL_BR Operator's manual - Manual (Page 27)

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Gas sampling and gas conditioning technology 2-1.1.7-ME
16.2 DISMANTLING THE DILUTION CROSS
Figure 11 shows an exploded drawing of the dilution unit.
Nut 1
Nut 2
Nut 3
Nut 4
Nut 5
Nut 6
Critical orifice
Mark
Injector
Mark
Mark
Tube sample gas
out
Block
180°C Version
O-rings
Figure 13 Exploded drawing of dilution unit
The following step-by-step procedure is recommended:

Remove probe insulating cover (see 16.1).

Loosen knurled screw for fixing heat conducting plates.

Remove heat conducting plates.

Remove all pipe connections on dilution unit (crosspiece). These are:
- vacuum pressure gauge nut 6
- dilution gas inlet nut 4
- sample gas outlet nut 5 (remove sample gas out pipe at upper elbow union. Do not remove
pipe connected to crosspiece)
- nut 1.
W A R N I N G !
Do not remove nut 2 until the dilution cross is removed from the
probe or the orifice will be broken !
The dilution cross is now ready for further maintenance and repair work.