Siemens SITRANS LR250 Operating Instructions Manual page 38

Installing/mounting
4.4 Installation instructions
Flange bolting instructions:
1. Use cross-pattern sequence as shown.
2. Check uniformity of the flange gap.
3. Apply adjustments by selective tightening if required.
4. Torque incrementally until desired value is reached.
5. Check/re-torque after 4 to 6 hours.
Recommendations for flange bolting:
● Check bolts periodically, re-torque as required.
● Use new lens, O-ring and spring washers after removal from installation.
For instructions on replacing the lens, see Part replacement (Page 199).
See Flanged Horn with extension (Page 226), Raised-Face Flange per EN 1092-1 (Page 255),
Flat-Face Flange (Page 258), and Flanged encapsulated antenna (3"/DN80/80A sizes and
larger) (Page 232) for dimensions.
38
SITRANS LR250 (FOUNDATION FIELDBUS)
Operating Instructions, 08/2014, A5E32221411-AC