Appendix A _________________________________ Probe Installation Kits and Installation Examples
VAISALA____________________________________________________________________ 85
Follow the steps below to install the HMP318 probe through a ball
valve assembly. After the installation, the probe should be sitting in
the process chamber or pipeline as shown in Figure 23 on page 84.
1.
Shut down the process if the process pressure is more than 10
bars. If the pressure is lower there is no need to shut down the
process.
2.
Close the ball valve.
3.
Seal the threads on the fitting body; refer to Figure 11 on page
26.
4.
Attach the fitting body to the ball valve and tighten it.
5.
Slide the clasp nut of the probe toward the filter, as far as it will
go.
6.
Insert the probe to the fitting body, and manually tighten the
clasp nut to the fitting body.
7.
Open the ball valve.
8.
Push the probe through the ball valve assembly into the process.
If the pressure is high, use the pressing handle that is provided
with the probe. If you push the probe hard without using the
handle, you may damage the cable.
Note that the probe must be pushed so deep that the filter is
completely inside the process flow.
9.
Mark the fitting screw and the clasp nut.
10. Tighten the clasp nut with a fork spanner a further 50 ... 60º
(ca. 1/6 turn). If you have a suitable torque spanner, tighten the
nut to max 45 ± 5 Nm (33 ± 4 ft-lbs). Refer to Figure 12 on
page 27.
NOTE
Take care not to tighten the clasp nut more than 60° to avoid
difficulties when opening it.
If you wish to remove the probe from the process, note that you have
to pull the probe out far enough. You cannot close the valve if the
groove on the probe body is not visible.
