Adding Traps To The Gas Supply; Figure 4-2. Gas Trap Order - Thermo Scientific FOCUS GC Site Preparation And Installation Manual

Building the Gas Lines
Use the following procedure to connect tubing to the gas supply control valves:
1. Make sure the initial supply valves (on cylinders or panel board) are turned
2. Determine the length of tubing you need. Use only enough tubing to connect
3. Use a tubing cutter to cut the tubing.
4. Use a Swagelok tube fitting to attach the tubing to the gas outlet. Refer to

Adding Traps to the Gas Supply

You may wish to use traps, such as moisture or oxygen traps, in your gas supply
line. Traps are especially necessary if you are unsure of the purity of your gas
supplies. Refer to
Preparation, for more information about gas purity requirements and appropriate
traps for your GC. Figure 4-2 shows the proper order of traps in a gas supply line.
Refer to your trap's instruction manual for specific purging and installation
requirements.
Site Preparation and Installation Manual
off.
the instrument to the gas supplies, but allow enough slack to allow the GC to
be moved at least 40 cm (16 in.) from other equipment. This allows enough
room to perform column connections and system maintenance. Also, be sure
to account for tee connections.
How to Use Swagelok Tube Fittings
instructions on using Swagelok fittings.
Gas and Plumbing Requirements
Gas Supply
in Chapter 3,
Moisture
trap

Figure 4-2. Gas Trap Order

Plumbing the Gas Supply to the GC
Before You Begin..., for
in Chapter 1, Laboratory
GC
Hydrocarbon Oxygen
trap
trap
Chapter 4
57