
CHAPTER 3_______________________________________________________________INSTALLATION
VAISALA _________________________________________________________________________ 11
If the sensor head is installed in a pressurized chamber, always make
sure that the pressure of the chamber is equalized with the ambient
pressure prior to removing the probe.
process pipe
welded sleeve
(G1/2)
Non leaking screw
(screw A)
closing valve
(ball valve)
sealing
capped nut
DIN 917-M22x1.5
when the probe is pulled
out for maintenance, cap
the hole with a capped nut;
this way, the process can be
open although the probe is
not in place
FIGURE 3-6 Installing the sensor head directly on the process pipe.
Installing the probe through the ball valve assembly
The best way to install the sensor head is through the ball valve
assembly. Use a 1/2” ball valve assembly with a ball hole of ∅14 mm
or more. In this kind of installation, it is not necessary to empty or
shut down the process for installing or removing the sensor head. If
the sensor head is installed in a process pipe, please note that the
nominal size of the pipe must be at least 1 inch. See FIGURE 3-7 -
FIGURE 3-8 for detailed instructions.
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