…5 Installation
Mean axial velocity method ( Diameter)
WARNING – PRESSURIZED EQUIPMENT
• When inserting or removing the insertion sensor,
the safety mechanism (see page 16) must be
fitted and engaged to prevent the insertion
sensor being forced out under pressure. Ensure
the valve is fully open.
• Safety restraint omitted for clarity.
Referring to Figure 24:
1 Measure internal diameter (D) of the pipe – see page 14.
2 Measure from the top of the pipe to the top of the valve
plate (VP) (item
A).
3 Slacken nut
B.
4 Lower insertion sensor
C until it touches valve plate D.
5 Slide positioning collar
E down to nut B and lock in place
using a 4 mm hexagon key (see page 16).
6 Retract insertion sensor shaft
F fully.
7 Unlock positioning collar
E, slide down and lock at the
distance:
30 mm (1.181.in.) + pipe thickness
8 Open valve
D fully with valve lever G.
9 Lower insertion sensor until positioning
E collar contacts
nut
B, with sensor tip at the required depth H.
10 Tighten nut
B to 40 Nm (30 ft lbf).
*Refer to pipe supplier/manufacturer specification.
Internal pipe
diameter (D)
Figure 24 Setting the insertion depth
– mean axial velocity method
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