Deltabar FMD71, FMD72 Technical data
Endress+Hauser 129
15.6 Process
15.6.1 Process temperature range for devices with ceramic process
isolating diaphragm FMD71
• Thread and flanges: –25 to +125 °C (–13 to +257 °F)
• Hygienic connections:–25 to +130 °C (–13 to +266 °F) , 150 °C (302 °F) for a maximum
of 60 minutes
• High-temperature version: –15 to +150 °C (+5 to +302 °F); see ordering information,
feature 610, option "NB".
• For saturated steam applications, use a device with a metal process isolating diaphragm,
or provide a siphon for temperature isolation when installing.
• Pay attention to the process temperature range of the seal. See also the following table.
Seal Notes Process temperature range Option
1)
Threaded connection or flange Hygienic process connections
FKM Viton - –25 to +125 °C (–13 to +257 °F)/
150 °C (302 °F)
2)
- A
FKM Viton FDA
3)
, 3A Class I, USP
Class VI
–5 to +125 °C (+23 to +257 °F) –5 to +150 °C (+23 to +302 °F) B
FFKM Perlast G75LT - –20 to +125 °C (–4 to +257 °F) –20 to +150 °C (–4 to +302 °F) C
Kalrez, Compound 4079 - +5 to +125 °C (+41 to +257 °F)/
150 °C (302 °F)
2)
- D
NBR FDA
3)
–10 to +100 °C (+14 to +212 °F) - F
NBR, Low temperature - –40 to +100 °C (–40 to +212 °F) - H
HNBR
4)
FDA
3)
, 3A Class II,
KTW, AFNOR, BAM
–25 to +125 °C (–13 to +257 °F)/
150 °C (302 °F)
2)
–20 to +125 °C (–4 to +257 °F) G
EPDM 70 FDA
3)
–40 to +125 °C (–40 to +257 °F) - J
EPDM 291
4)
FDA
3)
, 3A Class II, USP
Class VI, DVGW, KTW,
W270, WRAS, ACS,
NSF61
–15 to +125 °C (+5 to +257 °F)/
150 °C (302 °F)
2)
–15 to +150 °C (+5 to +302 °F) K
FFKM Kalrez 6375 - +5 to +125 °C (+41 to +257 °F) - L
FFKM Kalrez 7075 - +5 to +125 °C (+41 to +257 °F) - M
FFKM Kalrez 6221 FDA
3)
, USP Class VI –5 to +125 °C (+23 to +257 °F) –5 to +150 °C (+23 to +302 °F) N
Fluoroprene XP40 FDA
3)
, USP Class VI, 3A
Class I
+5 to +125 °C (+41 to +257 °F)/
150 °C (302 °F)
2)
+5 to +150 °C (+41 to +302 °F) P
VMQ Silicone FDA
3)
–35 to +85 °C (–31 to +185 °F) –20 to +85 °C (–4 to +185 °F) S
The process temperature ranges indicated here refer to the permanent operation of the FMD71. In the case of devices with hygienic process
connections, a higher temperature (max. 150 °C (302 °F)) may be applied for a short period (max. 60 min.) for cleaning purposes.
1) Product Configurator order code for "Seal"
2) 150 °C (302 °F) for high-temperature version
3) Food-safe FDA 21 CFR 177.2600
4) These seals are used for devices with 3A-approved process connections.
Applications with jumps in temperature
Frequent extreme changes in temperatures can temporarily cause measuring errors.
Temperature compensation takes effect after several minutes. Internal temperature
compensation is faster the smaller the jump in temperature and the longer the time
interval involved.