Technical data Deltabar PMD78B PROFINET with Ethernet-APL
90 Endress+Hauser
Diaphragm seal with tantalum membrane
–70 to +300 °C (–94 to +572 °F)
Devices with PTFE-coated diaphragm seal membrane
The anti-stick coating has very good anti-friction properties and protects the membrane
against abrasive media.
NOTICE
Destruction of the device due to incorrect use of PTFE coating!
‣
The PTFE coating used is designed to protect the unit against abrasion. It does not
provide protection against corrosive media.
Area of application of the 0.25 mm (0.01 in) PTFE foil on AISI 316L (1.4404/1.4435)
membrane, see the following graphic:
T
P
p
[bar p ]
e
[°C]
0
50
100
150
200
250
-40 25 50 75 100 125 150 175 200
[°F]
[psi p ]
g
0
725
1450
2175
2900
3625
-40 77 122 167 212 257
302
347
392
A0045213
For vacuum applications: p
abs
≤ 1 bar (14.5 psi) to 0.05 bar (0.725 psi) to max.
+150 °C (302 °F).
If a PTFE coating has been selected, a conventional membrane is always delivered.
Diaphragm seal capillary
armor
Process temperature depending on the ambient temperature.
• 316L: No restrictions
• PTFE: No restrictions
• PVC: See the following diagram
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