Endress+Hauser Levelflex FMP51 Operating Instructions Manual page 28

Mounting
6.5.3 Mounting the device
Mounting devices with thread
Devices with mounting thread are screwed into a welding boss or a flange and are usually also
secured with these.
• Tighten with the hexagonal nut only:
– Thread 3/4": Hexagonal wrench 36 mm
– Thread 1-1/2": Hexagonal wrench 55 mm
• Maximum permissible torque:
– Thread 3/4": 45 Nm
– Thread 1-1/2": 450 Nm
• Recommended torque when using an aramid fibre seal and a process pressure of 40 bar
(580 psi):
– Thread 3/4": 25 Nm
– Thread 1-1/2": 140 Nm
• When installing in metal containers, take care to ensure good metallic contact between
the process connection and container.
Flange mounting
If a seal is used, be sure to use unpainted metal bolts to ensure good electrical contact between
probe flange and process flange.
28
Levelflex FMP51, FMP52, FMP54
Endress+Hauser
A0012528