Mounting the burner flange seal
dreizler A 3001 E - 18.12.2015 | A 2011 - 1.12 | EN - 09.11.2012
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26 Mounting the burner flange seal
26.1 Mounting the flat sealing tape PTFE between burner flange and boiler door
The flat sealing tape must be mounted for all gas burners
of type marathon
®
M 5001 to M 10003 and
dual fuel burners marathon
®
MC 5001 to MC 10003.
Prior to mounting the burner on the boiler, the flat sealing tape must be fixed on the burner flange within
the bolt pitch circle (1).
For a tight seal, the flat sealing tape must be fixed overlapping between two bolts. (4)
Mount the burner on the boiler.
Tighten opposing threaded bolts evenly and in sequence.
NOTICE:
The universal flat sealing tape is adhesive on one side.
It consists of PTFE teflon and is temperature-resistant in the range of -240°C to +270°C.
26.2 Reference values for tightening torque
NOTICE:
Use an appropriate torque wrench for tightening the threaded bolts and comply with relevant reference val-
ues for starting torque.
Threaded bolt M 12: 22.5 - 42.5Nm
Threaded bolt M 16: 30 - 50Nm
Fig. 26-1 Flame tube bolt pitch circle
1
Threaded bolt
2
Flame tube
3
PTFE flat sealing tape
4
Overlap
Fig. 26-2 Side view flame tube with flat sealing tape
1
Burner housing
2
PTFE flat sealing tape
3
Boiler door
4
Flame tube