Installation Cerabar M, Deltabar M, Deltapilot M
20 Endress+Hauser
4.5.3 Seal for flange mounting
Corrupted measurement results.
The seal is not allowed to press against the process isolating diaphragm as this could affect
the measurement result.
‣ Ensure that the seal is not touching the process isolating diaphragm.
A0017743
Fig. 12:
1 Process isolating diaphragm
2Seal
4.5.4 Thermal insulation – PMP55
The PMP55 may only be insulated up to a certain height. The maximum permitted
insulation height is indicated on the devices and applies to an insulation material with a heat
conductivity 0.04 W/(m x K) and to the maximum permitted ambient and process
temperature. The data were determined under the most critical application "quiescent air".
A0020474
Fig. 13: Maximum permitted insulation height, here indicated on a PMP55 with a flange
A Ambient temperature:
70 °C (158°F)
B Process temperature: max. 400 °C (752°F), depending on the diaphragm seal filling oil used
1 Maximum permitted insulation height
2 Insulation material
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