Emerson OCX 8800 Instruction Manual page 82

OCX 8800
Figure 7-9. Removal of Sample
and Exhaust Tubes
2
1. Sensor Housing
2. Sample Tube
3. Exhaust Tube
4. In Situ Filter
4
7-12
Remove Sample and Exhaust Tubes
Use heat resistant gloves when removing the probe tube or exhaust tube. The tubes are
bonded with a thread sealing compound. The compound softens at 450°F (232°C). The
heated parts can cause severe burns.
1. Secure the sensor housing (1, Figure 7-9) in soft (plastic, wood, or
brass) vice jaws.
2. Use a propane torch to heat the sample tube (2) or exhaust tube (3) to
450°F (232°C), minimum. Apply the heat near the threaded end of the
tube.
3. While heating the tube, use a pipe wrench to apply removal torque to
part being removed. Apply torque until the pipe thread sealant softens.
Remove and discard the used sample tube (2), exhaust tube (3), or
in-situ filter (4).
4. Use MEK or methylene chloride solvent to clean thread sealant residue
from the internal pipe threads in the housing. Refer to applicable MSDS
sheet for solvent handling precautions.
1
3
Instruction Manual
IM-106-880, Rev 1.0
January 2007