User's Guide ______________________________________________________________________
188 _________________________________________________________________ M210566EN-J
Ball Valve Installation Kit for HMT338
The ball valve installation kit (Vaisala order code: BALLVALVE-1) is
preferred when connecting the probe to a pressurized process or pipeline.
Use the ball valve set or a 1/2" ball valve assembly with a ball hole of
ø14 mm or more. If you install the probe (ø12 mm) in a process pipe,
please note that the nominal size of the pipe must be at least 1 inch
(2.54 cm). Use the manual press handle to press the probe into the
pressurized (< 10 bar) process or pipeline.
0507-043
Figure 102 Installing the HMT338 Probe Through a Ball Valve
Assembly
The following numbers refer to Figure 102:
1 = Manual press tool
2 = Handle of the ball valve
3 = Probe
4 = Process chamber or pipeline
5 = Groove on the probe indicates the upper adjustment limit
6 = Filter
7 = Ball of the ball valve
8 = Fitting screw
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