Cerabar S
32 Endress+Hauser
PMP75 (with diaphragm seal)
• Depending on the diaphragm seal and filling oil from -70 °C (-94 °F) to +400 °C (+752 °F). Observe the
temperature application limits → ä 73.
Note!
• The PTFE foil used is designed to protect the unit against abrasion. It does not provide protection against
corrosive media.
• Do not use diaphragm seals with 0.09 mm (0.0035 in)/0.25 mm (0.01 in) PTFE foil on AISI 316L (1.4435/
1.4404) for vacuum applications, upper temperature limit +204 °C (+399 °F).
• For oxygen applications, observe → ä 28, "Oxygen applications" section.
Pressure specifications • The maximum pressure for the measuring device depends on the lowest-rated element with regard to
pressure.
See the following sections:
– → ä 7 ff, "Measuring range" section
– "Mechanical construction" section.
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 the temperature dependency of the MWP.
• The pressure values permitted at higher temperatures can be found in the following standards:
– EN 1092-1: 2001 Tab. 18
1
– 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 over pressure limit of the device (OPL = 1.5 x MWP
2
) and may be
applied for only a limited time period in order to avoid permanent damage.
• 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).
• In oxygen applications, the values for "p
max
and T
max
for oxygen applications" as per → ä 28, "Oxygen
applications" may not be exceeded.
1) With regard to their stability-temperature property, the materials 1.4435 and 1.4404 are grouped together under 13EO
in EN 1092-1: 2001 Tab. 18. The chemical composition of the two materials can be identical.
2) The equation does not apply for PMP71 and PMP75 with a 40 bar (600 psi) or 100 bar (1500 psi) measuring cell.
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