INFICON 3000 Micro GC Gas Analyzer Operating Manual - Manual (Page 92)

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3000 Micro GC Operating Manual
5.1.6.1 Heated Regulator
The Heated Regulator for natural gas (PN G2818A-X/G2845A-X/G2857A-X) is a
separately powered accessory that reduces the pressure of a gas sample for
introduction into 3000 Micro GC while maintaining the sample in a non-condensed
gas phase. This device is designed for use with natural gas samples introduced
through sample vessels or through sample lines connected to wellheads or transfer
points. The sample gas pressure must be 14 to 5516 kPa (2 to 800 PSI) with
thermal properties of up to 112 kJ/m
3 (3,000 BTU) as an ideal gas. 1 2
The sample enters the system through a quick disconnect fitting where it passes
through the particle filter and into a Heated Regulator. The sample pressure is
reduced to a range of 69 to 103 kPa (10 to 15 PSI) before it enters the
3000 Micro GC inlet.
A 7 micron sintered stainless steel particle filter reduces the risk of damage to
3000 Micro GC by particulate matter. The entire sample pathway, from the quick
connect fitting through the 3000 Micro GC sample transfer line, is heated to a
minimum temperature of 60°C.
Figure 5-23 Sample vessel connected to PN G2818A-X/G2845A-X/G2857A-X heated regulator and
3000 Micro GC via quick disconnect fitting (2-channel 3000 Micro GC shown)
1.Gas Processors Association (GPA) Standard 2145–00, Revision 1, “Table of Physical Constants for Hy-
drocarbons and Other Compounds of Interest to the Natural Gas Industry.”
2.Gas Processors Association (GPA) Standard 2172–96, “Calculation of Gross Heating Value, Relative Den-
sity and Compressibility Factor for Natural Gas Mixtures from Compositional Analysis.” Joint standard with
the American Petroleum Institute, API MPMS 14.5.
Sample vessel
stopcock
Sample
vessel
Stainless steel tubing (user provided)
Quick disconnect fitting
To vent
Low pressure vent tubing
High pressure vent tubing
To vent
Relief valve