Siemens Sitrans LR250 - Threaded Versions; Flanged Versions

Installing/mounting
4.4 Installation instructions
SITRANS LR250 with FOUNDATION FIELDBUS
Compact Operating Instructions, 09/2021, A5E48453221-AB
25
4.4.1 Threaded versions
WARNING
Pressure applications
Danger of injury or poisoning.
It may 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.)
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.
4.4.2 Flanged versions
NOTICE
Improper materials
The user is responsible for the selection of bolting and gasket materials (except for Flanged
encapsulated antenna) which will fall within the limits of the process connection and its
intended use, and which are suitable for the service conditions.
Special Instructions for PTFE flanged encapsulated antenna only
Note
•
Use spring washers
•
Lens assembly acts as integral gasket, no other required
•
Use recommended torque values for tightening bolts