Gas Supply - Agilent Technologies 7820A GC Site Preparation Manual

Gas Supply

7820A GC Site Preparation Guide
Supply instrument gases using tanks, an internal distribution
system, or gas generators. If used, tanks require two-stage
pressure regulators with packless, stainless steel diaphragms.
The instrument requires 1/8-inch Swagelok connections to its
gas supplies. See Figure
tubing/regulators so that one 1/8-inch Swagelok female
connector is available for each gas needed at the GC.
Swagelok nut and ferrules
Figure 2 Example Swagelok connector and hardware
Table 10 lists minimum and maximum delivery pressures for
inlets and detectors, measured at the bulkhead fittings on the
back of the instrument.
Table 10 Delivery pressures required at the GC, in kPa (psig)
Detector type
FID NPD
Hydrogen 240–690 240–690
(35–100) (35–100)
Air 380–690 380–690
(55–100) (55–100)
Makeup 380–690 380–690
(55–100) (55–100)
Reference
7820A GC Site Preparation
2. Plumb the gas supply
Female Swagelok fitting on GC
Inlet type
TCD uECD Split/Splitless Purged
380–690 380–690
(55–100) (55–100)
380–690
(55–100)
1
packed
17