Mounting - ABB SensyMaster FMT230 Commissioning Instruction

32 FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
... 6 Installation
... Assembly of the welding adapter with compression ring fitting

Mounting

Calculation of mounting dimensions
L Length of the welding adapter
Z Height dependent on nominal
diameter
1 Flow direction (arrow marker on the protection tube)
2 Compression fitting
3 Safety snap ring
Figure 19: Calculating mounting dimensions
Calculations (mm)
L = h3−(½×ØD)
Z = (h3+137 mm)−(½×ØD)
Calculations (in)
L = h3−(½×ØD)
Z = (h3+5.39 in)−(½×ØD)
h3 Installation length of the sensor
∅D Outside diameter of the piping
Preparing the sensor
DANGER
Fire hazard in oxygen applications
Fire hazard in oxygen applications due to the use of
unapproved thread sealing compound.
• Use only approved thread sealing compound for oxygen
applications!
WARNING
Risk of injury
Risk of injury due to the sensor ejecting because of a missing
safety ring.
• Mount the sensor with compression fitting only with the
safety ring in place.
1 Sensor protection tube
2 Safety snap ring
Figure 20: Snap ring and marking
1. Slide the compression fitting onto the sensor and tighten by
hand so that the compression fitting can still be moved.
2. Insert the safety snap ring using mounting pliers (see
Figure 20, Pos. 2 ).
Note
For gas-tight sealing of the NPT thread of the compression
fitting, you can for example use special thread sealing
compounds by Swagelok such as SWAK™, Silver Goop™, PTFE-
Free, etc., or PTFE thread sealing tape.
3 Marking for reinstallation