10
7890 Series GC Site Preparation Checklist
Issued: 09-Dec-2015, Revision: 1.8
Copyright
2013
Agilent Technologies
Page 10 of 15
33B
Gas Plumbing and Supplies
Plumbing Considerations
1.
Refer to the "Gas Plumbing" section in the "Agilent GC, GC/MS and ALS Site Preparation Guide"
for more detail.
2.
Gases are supplied by tanks, internal distribution system, or gas generators. Tank supplies
require two stage, pressure regulation. To connect tubing to the supply, it must have one 1/8-inch
Swagelok
female connector for each gas. Make sure that your regulator has the appropriate
sized adapter to end with a 1/8-inch Swagelok
female connector.
3.
If your order did NOT include parts to connect the gas supply to your 7890 GC, you must supply
pre-cleaned, 1/8-inch copper tubing and a variety of 1/8-inch Swagelok
fittings to connect the
gas supply(s). Refer to the "GC Installation Kits" and "GC Plumbing" sections of this checklist for
Part Numbers.
4.
Never use liquid thread sealer to connect fittings. Never use chlorinated solvents to clean
tubing or fittings.
5.
Agilent also recommends using traps to remove water, hydrocarbons, and oxygen or a
combination trap such as the "Gas Clean" Filter System that removes all three.
Special Notes
1.
Shutoff Valves are recommended at both front and back Inlet Carrier Connections
2.
FID, FPD and NPD need dedicated detector air supply
3.
For Gas supply runs longer than 15 feet, use 1/4 inch tubing to prevent pressure drop
4.
Do not reuse old copper tubing which can become brittle and break
Gas Clean Filter Configurations
Refer to the "Gas Plumbing/Filters and Traps" section of the "Agilent GC, GC/MS, and ALS Site
Preparation Guide" for more detail. Another good resource is the "Agilent Gas Clean Filter System User
Manual" -
http://www.chem.agilent.com/Library/usermanuals/Public/GasCleanFilter_5973-1528.pdf
Tank
Regulators
must
terminate
in a 1/8"
Swagelok
fitting
