M&C TechGroup SP2000H_DIL_BR Operator's manual - Manual (Page 29)

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Gas sampling and gas conditioning technology 2-1.1.7-ME
16.2.2 CHANGING THE PACKING AT THE CRITICAL ORIFICE ( 320°C-VERSION)
When the orifice is removed please change the packing (320°C- version) as well.
Figure 15 shows the dilution cross with the orifice and the packing (320°C version).
Jet pipe
2
1
Orifice
Sucking pipe
Pos. 2:
Packing for critical orifice
consisting of 4 graphite seals

3,2/

6 – 1,5mm thickness
plus plain washer

3,3/

6
Part No.: 93 S 4005 Orifice Seat Graphite rings Plain washer
Mounting tool
Part No.: 93S4040
3
Nut 3 Injector
Figure 15 Dilution cross with graphite packing (320°C-Version)
The stepwise change of the graphite packing is as follows:

Remove the dilution cross as described in 16.2;

Loosen nut 3 and dismount the jet pipe;

Push out the injector with the mounting tool (Pos.3, Fig. 15) from the jet pipe side

Push out the orifice, the orifice seat and the graphite packing carefully from the opposite side
using the mounting tool (pos. 3, Fig. 15);

Remove the graphite sealing;

Push 4 new graphite rings and the plain washer on the orifice (dimension see Fig.15);

Place the orifice seat in the crosspiece;

Put the orifice in the seat;

Push the graphite packing with the tool into the cross up to block and press;

Re-fit the jet pipe.
W A R N I N G !
The Swagelok ® fittings must be carefully tightened to avoid damag-
ing the internal components. Tightening too far will damage the
cross.
Use a mating gauge to make sure that the fittings are not too tight.
If a fitting is believed to be leaking, do not tighten the fitting to re-
move the leak. Disassemble the piece completely and reassemble it
making sure that the nut is not tightened too far.