Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
12
1.8
Sealing material compatibility
EL-FLOW® Select
instruments are fitted from factory with internal seals compatible with the gas type(s) as specified at
ordering time. Before using other media, always check their compatibility with the applied sealing materials. Check the
on the serial number label to see which sealing materials have been incorporated in your specific instrument.
When in doubt, do not hesitate to contact your Bronkhorst representative for more information.
The table below lists compatibility with some commonly used gases:
Gas
Sealing material
Viton® (FKM)
EPDM
Kalrez® (FFKM)
Air
ü
ü
ü
Ar (Argon)
ü
ü
ü
CH
4
(Methane)
ü
û
ü
CO (Carbon monoxide)
ü
ü
ü
CO
2
(Carbon dioxide)
max 10 bar(g), 50°C
ü
max 10 bar(g), 50°C
(ED compound
1
max 30 bar(g))
C
2
F
6
(Freon-116)
ü
ü
ü
C
2
H
2
(Acetylene)
ü
/
û
2
ü
ü
C
2
H
4
(Ethylene)
max 10 bar(g)
3
max 10 bar(g)
max 10 bar(g)
C
2
H
6
(Ethane)
ü
û
ü
C
3
H
6
#2 (Propylene)
max 10 bar(g)
û
max 58 bar(g)
3
C
3
H
8
(Propane)
ü
û
ü
Cl
2
(Chlorine)
ü
û
ü
He (Helium)
ü
ü
ü
H
2
(Hydrogen)
ü
ü
ü
H
2
S (Hydrogen sulfide)
û
ü
ü
Kr (Krypton)
ü
ü
ü
NF
3
(Nitrogen trifluoride)
û
û
ü
NH
3
(Ammonia)
û
ü
ü
NO (Nitric oxide)
û
û
ü
N
2
(Nitrogen)
ü
ü
ü
N
2
O (Nitrous oxide)
max 20 bar(g), 50°C
ü
ü
O
2
(Oxygen)
ü
ü
ü
SF
6
(Sulfur hexafluoride)
û
ü
ü
SiH
4
(Silane)
ü
/
û
2
û
ü
Xe (Xenon)
ü
ü
ü
1) ED: Explosive Decompression resistant
2) Only O-ring seals, not suitable for control valve plunger
3) For higher pressures ED compounds are used
·
Always make sure that the applied process gases or mixtures thereof are compatible with the applied sealing materials.
·
Do not exceed the specified maximum operating pressure and temperature. Using the instrument outside the specified
operating limits might lead to serious damage and dangerous situations.
·
The gas(es) used in the fluid system in which the instrument is mounted should be clean and dry.
