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Specifications
Table 3-4
Gas supply
Instrument air
Carrier gas
Corrosion protection
These are general parameters that vary depending on the individual application and
configuration.
Table 3-5
Typical Gas Requirements
Type
Carrier gas
Hydrogen
Nitrogen
Helium
Argon
Synthetic Air
Combustion gas Hydrogen
Combustion air
Synthetic air
Actuation air
Purge air
Instrument air
(py purge)
or Nitrogen
Purge air
Instrument air
(px purge)
or Nitrogen
Valve gas
(for Model 50)
Oven heating
(for Airbath
oven)
Vortex cooler
PTGC
94
● At least 350 kPa (50 psig) for units with Model 11 or Valco valves
● At least 825 kPa (120 psig) for units with Model 50 valves
● At least 175 kPa (25 psig) for airbath ovens; 85 l/min per oven
● Instrument air quality requirement: ISO-8573-1:2010 [3:2:3]
[ 3 : - : - ] Dust filtering down to 1 micron
[ - : 2 : - ] Dew point of -40°C
[ - : - : 3 ] Total hydrocarbon below 1 mg per cubic meter (appr. 0.8 ppmw)
● Hydrogen, Nitrogen, Helium, Argon, or Synthetic Air in compressed gas cylinder,
purity 99.999%, or hydrogen with a purity of 99.999% (depending on application).
● Typical consumption quantity: 5 to 100 l/month per detector module
● Purging with dry air to protect the electronics
● Airbath oven with stainless steel lining
● Airless oven made of aluminum
● Steel lining painted on outside (epoxy powder coating)
Quality
Pressure
5.0 (≥ 99,999%)
500 to 1000 kPa (72.5 to
145 psig)
5.0 (≥ 99,999%)
500 to 1000 kPa (72.5 to
145 psig)
Hydrocarbon free
500 to 1000 kPa (72.5 to
145 psig)
Instrument air
Instrument air
400 to 1655 kPa (58 to 240
psig)
Instrument air
400 to 600 kPa (58 to 87
psig)
Instrument air
500 to 1000 kPa (72.5 to
145 psig)
Instrument air
400 to 600 kPa (58 to 87
psig)
Instrument air
300 to 600 kPa (43.5 to 87
psig)
Instrument air
400 to 600 kPa (58 to 87
psig)
Typical Consumption
50 to 150 ml/min/train
30 to 50 ml/min/FID
Approx. 100 ml/min/FPD
Approx. 400 ml/min/FID
Approx. 100 ml/min/FPD
Initial purge: Approx. 65l/min
Operating purge: Approx. 3.5 l/min
Initial purge: 60 to 80 l/min
Operating purge: 12 to 18 l/min
85 l/min/oven
130 to 170 l/min
210 l/min
Maxum II Reference Manual
Manual, 7/2017, 2000596-001

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