Using Compressed Air - Agilent Technologies ALS Handbuch

Using compressed air

The multimode inlet can also use compressed air cooling with the liquid N
inlet cooling option. Requirements for compressed air cooling:
• The compressed air should be free of particulate material, oil, and other
• The required air supply pressure depends on the installed solenoid valve
While air supplied from tanks can meet these criteria, the consumption rate of
air can be 80 L/min, varying based on supply pressure.
Installation of a compressed air line to the inlet cryo coolant valve requires the
hardware (and appropriate fittings) noted below:
• Use 1/4-inch copper or stainless steel tubing for supply tubing to the N
GC, GC/MS, and ALS Site Preparation Guide
contaminants. These contaminants could clog the inlet's cryo valve and
expansion orifice or impact the proper operation of the GC.
type. For a multimode inlet with N
138 to 276 kPa (20 and 40 psig).
valve
7890 Series GC Site Preparation
cooling, set the air supply pressure to
2
2
2
55