User's Manual

Table Of Contents
Installing/mounting
4.4 Flange bolting, Flanged encapsulated antenna only
SITRANS LR250 (HART)
22 Operating Instructions, 01/2014, A5E32220602-AB
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 above.
Flanged versions
See Flanged Horn with extension (Page 196), Raised-Face Flange per EN 1092-1 (Page 208),
Flat-Face Flange (Page 211), and Flanged encapsulated antenna (3"/DN80/80A sizes and
larger) (Page 202) for dimensions.
4.4
Flange bolting, Flanged encapsulated antenna only
Note
Use spring washers
Do not use additional gasket
Use recommended torque values for tightening bolts
Flange bolting: recommended torque
Pressure class
Nominal pipe size
(NPS)
Number of bolts
Recommended torque
(Nm)
ASME B16.5, Class
150
2"
4
30 50
3"
50 70
4"
8
40 60
6" 70 90
EN1092-1, PN16 /
JIS B 2220, 10K
DN50/50A
4
30 50
DN80/80A
8
DN100/100A
DN150/150A
60 80