Waterworks
IOM
Sensors
| 41 |
7.3.3 Installation of the sensor
7.3.3.1 Preparation of the pipe
ATTENTION: The preparation of the pipe can be carried out even on pressurized lines by using special machinery.
Aside from the fact that this operation requires the use of special equipment, it is also intrinsically dangerous.
Thus, it is recommended to rely exclusively on highly specialized personnel.
ATTENTION: Before inserting the sensor, check that the insertion hole is free from obstruction and/or burrs
caused by preparation work because it could damage the device.
7.3.3.2 Assembly of the flowmeter
Drill the pipe at the installation point.
The diameter of the hole must be
Ø 25 ± 1mm.
Weld the threaded sleeve, paying
the utmost attention to its correct
orientation.
The axis of the sleeve must
intersect the axis of the pipe and
be perpendicular to it.
Install the valve, use PTFE tape to
ensure the tightness of the thread.
Close the valve and pressurize the
pipe if necessary.
Fig. 65
Fig. 66
Fig. 67
Install the insertion meter,
making sure that the stem
is completely retracted to
prevent the head with the
electrodes from hitting the
valve.
Use PTFE tape to ensure
the tightness of the thread.
1. Open the valve completely
2. Adjust the insertion depth
3. Adjust the alignment in
relation to the pipe axis.
The alignment precision
must be within ±2°.
Tighten the lock nut by
applying a tightening
torque of 40Nm (30 ft-lb).
Connect the safety chain by
adjusting its length.
Fig. 68
Fig. 69
Fig. 70
Fig. 71
