Installation | 5
Instruction Manual COBRA NF 0750 A - NF 0950 A WCV_EN_en
15 | 44
NOTE
Water hardness unit conversion.
1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french degree)
5.2.4
Barrier Gas System Connection (Optional)
WARNING
The barrier gas system is mandatory for the suction of process gas with a volume of oxygen
higher than 21% (>21%).
PRV
FME
BGC
MAN
Description
BGC
Barrier gas connection
FME
Flow meter
MAN
Manometer
PRV
Pressure regulating valve
●
Connect the barrier gas connection (BGC) to the gas supply.
Connection size:
– G1/4, ISO 228-1
●
Make sure that the gas complies with the following requirements:
Gas type
Dry nitrogen or air
Gas temperature
°C
0 ... 60
Maximum gas pressure
bar
13
Recommended pressure setting at the pres-
sure regulating valve (PRV)
bar(a)
3
Filtration
µm
5
Recommended flow rate
SLM (standard li-
ter per minute)
15 ... 20
