Bronkhorst EL-FLOW Prestige - Manual (Page 32)

Bronkhorst High-Tech B.V.
EL-FLOW Prestige 9.17.084 32
4 Advanced operation
4.1 Sealing material compatibility
EL-FLOW Prestige instruments are equipped from factory with sealings compatible with the requested gas type. However the
instruments have multi-gas/multi-range functionality on board, if another gas or mixture is used, always make sure that the gas/
mixture is compatible with the installed sealing materials. As factory standard, the instruments are provided with Viton® static seals
with FFKM dynamic seals. EPDM sealed instruments or full Kalrez®/FFKM are available as an option, see the model key indication
...-V-..., ...-E-... or ...-K-... on the instrument back-side label. Each sealing material has its specific compatibility with used process
gases. See the table below for compatibility with the 25 most used process gases:
Gas Modelkey: ...-V-...
Static seals: Viton®
Dynamic seals: FFKM
(viton for n.o. valves or
FDA/USP class VI)
Modelkey: ...-E-...
Static seals: EPDM
Dynamic seals: EPDM
Modelkey: ...-K-...
Static seals: Kalrez®/FFKM
Dynamic seals: FFKM
Remarks
Air
Ar (Argon)
CH
4
(Methane)
CO (Carbon monoxide)
CO
2
(Carbon dioxide) max: 10 bar(g), 50°C max: 10 bar(g), 50°C
C
2
F
6
(Freon-116)
C
2
H
2
(Acetylene) / * * FFKM dyn. seal only
C
2
H
4
(Ethylene) max: 10 bar(g) max: 10 bar(g) max: 10 bar(g)
C
2
H
6
(Ethane)
C
3
H
6
#2 (Propylene) max: 10 bar(g) max: 58 bar(g)
C
3
H
8
(Propane)
Cl
2
(Chlorine) Dry gas only
He (Helium)
H
2
(Hydrogen)
H
2
S (Hydrogen sulfide)
NF
3
(Nitrogen
trifluoride)
NH
3
(Ammonia)
NO (Nitric oxide)
N
2
(Nitrogen)
N
2
O (Nitrous oxide) max: 20 bar(g), 50°C
O
2
(Oxygen)
SF
6
(Sulfur
hexafluoride)
SiH
4
(Silane) / * * FFKM dyn. seal only
Xe (Xenon)
Sealing material compatibility list
Do not use process gases/mixtures that are incompatible with the sealing materials the EL-FLOW Prestige
instrument is equipped with and do not exceed the indicated maximum operating pressure/temperature. Using the
instrument outside the given operating limits may lead to serious damage to the instrument.