Vaisala MM70 User Manual download pdf (Page 19)

Chapter 3 ____________________________________ INSTALLATION AND MOUNTING OPTIONS

0605-083

Figure 6 Sealing Thread Cutting for the Fitting Body

CAUTION

In pressurized processed it is essential to tighten the supporting nuts

and screws very carefully to prevent loosening of the probe by the

action of pressure

CAUTION

Take care not to damage the probe body. A damaged body makes the

probe head less tight and may prevent it from going through the clasp

nut.

Ball Valve Installation

The ball valve installation is preferred when connecting the probe to a

pressurized process or pipeline. Use the Vaisala BALLVALVE-1 ball

valve set or a 1/2" ball valve assembly with a ball hole of 14 mm or

more. If you install the sensor head ( 12 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 tool to press the sensor head into the

pressurized (< 10 bar) process or pipeline.

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. Make the installation according to the figure below. Install the

sensor head transversely against the direction of the process

flow.

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Vaisala MM70 User Manual Page 19