Endress+Hauser HART Levelflex FMP51 Brief Operating Instructions page 25

Levelflex FMP51, FMP52, FMP54
6.3.3 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 silos, take care to ensure good metallic contact between the
process connection and silo.
Flange mounting
For devices with mounting flange:
If a seal is used, be sure to use unpainted metal bolts to ensure good electrical contact between
probe flange and process flange.
Endress+Hauser
Mounting
A0012528
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