Levelflex FMP51, FMP52, FMP54
76 Endress+Hauser
Process
Process temperature range
The maximum permitted temperature at the process connection is determined by the O-ring version
ordered:
Device O-ring material Process temperature Approval
FMP51 FKM (Viton GLT
37559)
–30 to +150 °C (–22 to +302 °F)
–40 to +150 °C (–40 to +302 °F)
only in combination with feature 610 "Accessory Mounted"
option model NC "Gas-tight feed through"
EPDM (70C4 pW FKN
or E7515)
–40 to +120 °C (–40 to +248 °F)
FFKM (Kalrez 6375)
1)
–20 to +200 °C (–4 to +392 °F)
2)
FMP52 — –50 to +200 °C (–58 to +392 °F); completely coated FDA, 3A,
EHEDG, USP
Cl. VI
3)
FMP54 Graphite Version XT: –196 to +280 °C (–321 to +536 °F)
4)
Version HT: –196 to +450 °C (–321 to +842 °F)
1) Recommended for steam applications
2) Not recommended for saturated steam above 150 °C (302 °F). Use FMP54 instead.
3) Plastic parts in contact with process have been tested according to USP <88> Class VI-70°C.
4) Not recommended for saturated steam above 200 °C (392 °F). Use the HT version instead.
With uncoated probes, the medium temperature may be higher, under the condition that the
maximum process temperature specified in the table above is not exceeded at the process
connection.
However, when using rope probes, the stability of the probe rope is reduced by structural
changes at temperatures above 350 °C (662 °F).
Process pressure range
Device Process pressure
FMP51 –1 to 40 bar (–14.5 to 580 psi)
FMP52 –1 to 40 bar (–14.5 to 580 psi)
FMP54 –1 to 400 bar (–14.5 to 5 800 psi)
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