Technical information
Deltabar M PMD55
26 Endress+Hauser
Operating conditions (Process)
Process temperature limits
(temperature at transmitter)
• Process connections made of 316L:
–40 to +85°C (–40 to +185°F)
• Process connections made of C22.8:
–10 to +85°C (+14 to +185°F)
The process temperature at the transmitter can be reduced through the use of pulse lines.
Note!
• For oxygen applications, observe ä 24 "Oxygen applications" section.
• Observe the Process temperature range of the seal.
See also the following section "Process temperature range, Seals".
Process temperature range,
Seals
Pressure specifications • The maximum pressure for the measuring device is dependent on the lowest-rated element with regard to
pressure, see the following sections for this:
– ä 7 ff, section "Measuring range"
– chapter "Mechanical construction".
The MWP (maximum working pressure) is specified on the nameplate. This value refers to a reference
temperature of 20°C (68°F) or 100°F (38 °C) for ANSI flanges and may be applied to the device for an
unlimited time. Observe pressure-temperature dependency.
• The pressure values permitted at higher temperatures can be found in the following standards:
– EN 1092-1: 2001 Tab. 18
– ASME B 16.5a – 1998 Tab. 2-2.2 F316
– ASME B 16.5a – 1998 Tab. 2.3.8 N10276
– JIS B 2220
• The MWP applies for the temperature ranges specified in the "Ambient temperature range" ( ä 25) and
"Process temperature limits" (see above) sections.
• The test pressure corresponds to the over pressure limit of the measuring instrument (Over pressure limits
OPL = 1.5 x MWP) and may fit only temporally limited, so that no permanent damage develops.
• 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 OPL (Over Pressure Limit) of the pressure
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; PN = MWP).
• In oxygen applications, the values for "p
max
and T
max
for oxygen applications" ä 24, "Oxygen
applications" may not be exceeded.
Feature 190 of
the order code
1
1) See product structure ( ä 39)
Seal Process temperature range
2
2) Restricions for oxygen applications, ä 24
A FKM Viton –20 to +85°C (–4 to +185°F)
C PTFE –40 to +85°C (–40 to +185°F)
F NBR –20 to +85°C (–4 to +185°F)
J EPDM –40 to +85°C (–40 to +185°F)