ITABAR Flow Sensor Type
FTMD
Operating manual
8
6
10
3
4
7
5
Fig. 11 Sensor profile with protection pipe
6.2 Installation of Type FTMD-26
The design of the ITABAR Sensor of the type
FTMD-26 is almost identical to the type FTMD-25.
The only difference is the sensor end support (with
sealing plug, see Fig. 12) which permits higher
stream velocities in the pipe.
Attention!
Due to construction of the FTMD-26 with end
support it would cause many problems to install it
for the first time during operation.
We recommend you to install this type during
operation stop as per following instructions.
After installation also this sensor can rejected and
inserted as type FTMD-25 under pressure.
Installation of weld socket:
1. Drill a hole of 35 mm diameter into the pipe.
2. Tack the weld socket {1} onto the pipe leaving
approx. 2 mm clearance. Align the socket (e.g.
with a bolt or pin) so that it is exactly perpen-
dicular to the pipe axis (Fig. 12).
3. Before final welding and installing the sensor,
you have to mount the end support {5}.
Installation of the end support:
4. Take a cord and tie one end around the installed
weld socket {4}. Wrap the other end of the cord
around the pipe so that it forms a loop around
the pipe. Mark the half-way point of the pipe
circumference on the pipe.
5. Now drill a second hole of
∅
35 mm diameter
into the pipe.
6. Remove the sealing plug {9} (if present) from
the sensor end support. Tack the sensor end
support onto the pipe leaving approximately 2
mm clearance. (Fig. 12)
7. Insert the sensor into the pipe and check the
alignment of the sensor end support. If
necessary, correct the alignment.
2
1
5
9
Fig. 12: Installation hardware and sensor end
support
8. Now the final welding can be carried out.
Check the alignment of the weld socket again!
For permissible deviations, see chapter 5.4. .
9. For sensor end supports with sealing plug only:
Seal the thread of the sealing plug {9} with a
suitable sealing compound (e.g. PTFE tape).
Screw the sealing plug into the sensor end
support and tighten it firmly (Fig. 12).
10. Install the Flo-Tap unit isolating valve {2} on
the welding socket. Verify that the valve is in
fully open position, and that the stem is in line
with the pipe to insure clearance for the insert-
retract rods.
11. Perform the installation of the sensor into the
pipe according to the instructions given in
chapter 6.1 steps 10 through 15.
7
