Levelflex FMP56, FMP57
58 Endress+Hauser
Process
Process temperature range
The maximum permitted temperature at the process connection is determined by the O-ring version
ordered:
Gerät O-ring material Process temperature
1)
FMP56 FKM (Viton GLT) –30 to +120 °C (–22 to +248 °F)
EPDM (70C4 pW FKN) –40 to +120 °C (–40 to +248 °F)
FMP57 FKM (Viton GLT) –30 to +150 °C (–22 to +302 °F)
EPDM (E7502 or E7515) –40 to +120 °C (–40 to +248 °F)
1) with PA coated rope probes max. 100 °C (+212 °F)
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
FMP56, FMP57 –1 to 16 bar (–14.5 to 232 psi)
This range may be reduced by the selected process connection. The pressure rating (PN)
specified on the flanges refers to a reference temperature of 20 °C, for ASME flanges 100 °F.
Pay attention to pressure-temperature dependencies.
Please refer to the following standards for the pressure values permitted for higher
temperatures:
• EN 1092-1: 2001 Tab. 18
With regard to their temperature stability properties, the materials 1.4435 and 1.4404 are
grouped under 13E0 in EN 1092-1 Tab. 18. The chemical composition of the two materials
can be identical.
• ASME B 16.5a - 1998 Tab. 2-2.2 F316
• ASME B 16.5a - 1998 Tab. 2.3.8 N10276
• JIS B 2220
Dielectric constant (DC)
Rod and rope probe: DC (ε
r
) ≥ 1.6
Expansion of the rope probes
through tension and
temperature
4 mm rope:
• Elongation through tension: at max. permitted tensile load (12 KN): 11 mm / m rope length
• Elongation through temperature increase from 30 °C (86 °F) to 150 °C (302 °F): 2 mm / m rope
length
6 mm rope:
• Elongation through tension: at max. permitted tensile load (30 KN): 13 mm / m rope length
• Elongation through temperature increase from 30 °C (86 °F) to 150 °C (302 °F): 2 mm / m rope
length
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