Mounting Instructions - Siemens SITRANS LR250 (HART) Manual De Inicio Rápido

Mounting instructions

WARNING: For pressure applications, it will be necessary to use PTFE tape or other
appropriate thread sealing compound, and to tighten the process connection
beyond hand-tight. (The maximum recommended torque for Threaded versions is 40
N-m (30 ft.lbs. See Flanged encapsulated antenna (FEA), flange bolting
recommended torque values.)
Note: There is no limit to the number of times a device can be rotated without damage.
Mounting on a Stillpipe or Bypass Pipe
See full operating instructions for further details.
Threaded versions
1) Before inserting the device into its mounting connection, check to ensure the threads are
matching to avoid damaging them.
2) Simply screw the device into the process connection, and hand tighten, or use a wrench.
For pressure applications see Warning note above.
Flanged versions
WARNING: The user is responsible for the selection of bolting and gasket (except
for Flanged encapsulated antenna) materials which will fall within the limits of the
process connection and its intended use, and which are suitable for the service
conditions.
Flanged encapsulated antenna (FEA), flange bolting
Notes:
• Use spring washers for Flanged encapsulated antenna.
• Do not use additional gasket
• Use recommended torque for tightening bolts
Flange bolting: recommended torque
Pressure class
ASME B16.5,
Class 150
EN1092-1, PN16/
JIS B 2220, 10K
A5E31997170
Nominal pipe size
(NPS)
2"
3"
4"
6"
DN50/50A
DN80/80A
DN100/100A
DN150/150A
SITRANS LR250 (HART) – QUICK START MANUAL
Number of bolts
4
8
4
8
on page 9 for FEA
Recommended
torque (Nm)
30-50
50-70
40-60
70-90
30-50
60-80
Page EN-9