Deltabar FMD71, FMD72
Endress+Hauser 29
Process temperature range
for devices with metallic
process isolating diaphragm
FMD72
Device Limits
Process connections with internal process isolating diaphragm –40 to +125 °C (–40 to +257 °F)
Process connections with flush-mounted process isolating diaphragm
(flanges, G 1 A, G 1½, G 2, MNPT)
–40 to +100 °C (–40 to +212 °F)
Hygienic process connections with flush-mounted process isolating
diaphragm
–40 to +130 °C (–40 to +266 °F)
For max. 60 minutes: +150 °C (+302 °F)
Pressure specifications
L
WARNING
The maximum pressure for the measuring device depends on the lowest-rated element with
regard to pressure.
‣
For pressure specifications, see the "Measuring range" section and the "Mechanical construction"
section.
‣
The MWP (maximum working pressure) is specified on the nameplate of the individual sensor
module. Betriebsdruck) angegeben. This value refers to a reference temperature of
+20 °C (+68 °F), or +38 °C (+100 °F)for ASME flanges, and can be present at the device for an
unlimited period. Observe pressure-temperature dependency.
‣
Please refer to the following standards for the pressure values permitted at higher temperatures:
EN 1092-1: 2001 Tab. 18 (With regard to their stability-temperature property, the materials
1.4435 and 1.4404 are grouped together 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
‣
The test pressure corresponds to the overload limit of the individual sensors (overpressure limit
OPL = 1.5 x MWP (formula does not apply to the FMD72 with a 40 bar (600 psi) measuring
cell)) and may be applied for a limited period only to ensure that no lasting damage occurs.
‣
The Pressure Equipment Directive (EC Directive 97/23/EC) uses the abbreviation "PS". The
abbreviation "PS" corresponds to the MWP (maximum working pressure ) of the measuring
device..
‣
In the case of sensor range and process connections where the over pressure limit (OPL) of the
process connection is smaller than the nominal value of the sensor, the device is set at the
factory, at the very maximum, to the OPL value of the process connection. If you want to use the
entire sensor range, select a process connection with a higher OPL value (1.5 x PN; MWP = PN).
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