Mounting Liquicap M FMI51 HART
24 Endress+Hauser
A0040476
4.7.1 Probe installation
Probe with thread
Cylindrical threads G½, G¾, G1, G1½
To be used with the elastomer fiber seal supplied or another chemically resistant seal.
Make sure that the temperature resistance of a seal is correct.
The following applies to probes with a parallel thread and supplied seal:
Thread G½
• for pressures up to 25 bar (362.5 psi): 25 Nm (18.4 lbf ft)
• maximum torque: 80 Nm (59.0 lbf ft)
Thread G¾
• for pressures up to 25 bar (362.5 psi): 30 Nm (22.1 lbf ft)
• maximum torque: 100 Nm (73.8 lbf ft)
Thread G1
• for pressures up to 25 bar (362.5 psi): 50 Nm (36.9 lbf ft)
• maximum torque: 180 Nm (132.8 lbf ft)
Thread G1½
• for pressures up to 100 bar (1 450 psi): 300 Nm (221.3 lbf ft)
• maximum torque: 500 Nm (368.8 lbf ft)
Conical threads ½ NPT, ¾ NPT, 1 NPT, 1½ NPT
Wrap the thread with a suitable sealing material. Use conductive sealing material only.
Probe with Tri-Clamp, sanitary connection or flange
The process seal must meet the specifications of the application. Check the seal's resistance
to temperature and medium.
If the flange is PTFE-clad, this generally suffices as the seal up to the permitted operating
pressure.
Probe with PTFE-clad flange
Use spring washers!
Depending on process pressure and process temperature, check and re-tighten the screws
at regular intervals.
Recommended torque: 60 to 100 Nm (44.3 to 73.8 lbf ft).
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