Jensen Inert
Tubing and fittings made from inert materials.
http://jenseninert.com/

Chem4Kids.com: Inert Gases
Chem4Kids.com! The web site that teaches the basics of chemistry to everyone!
http://www.chem4kids.com/files/elem_inertgas.html

Flow Dynamics
Flow Dynamics, the world's largest manufacturer of full-featured flowmeter calibration equipment, offers NIST-traceable liquid & gas flowmeter calibration service for a wide range of flowmeters in their independent, primary standard flow calibration laboratory. With ISO/IEC 17025 and ANSI Z540 accreditation, Flow Dynamics services and repairs of all major types of flowmeters.
http://www.flow-dynamics.com

R. D. Webb Company
High temperature vacuum/inert gas atmosphere furnace designed specifically for university, industrial, and government research laboratories.
http://www.rdwebb.com/

R.D. Webb Company
High temperature vacuum sintering furnace designed for university, industrial, and government research laboratories.
http://www.rdwebb.com/sintering3.htm

Baker Petrolite Polymers
Producer of low molecular weight polyethylene and polyolefin wax additives. Inert and functional chemistry.
http://www.bakerhughes.com/bakerpetrolite/polymers

Bio-Chem Valve, Inc.
Together Bio-Chem Valve and OmniFit offer quality fluid handling systems such as inert valves, fitting, connectors, miniature valves and more.
http://www.bio-chemvalve.com

DuPont Fluoroguard
DuPont™ Fluoroguard® Polymer Additives, available in a range of colorless, odorless, chemically inert polymer additives are based on a fluorinated synthetic oil. Designed for a variety of uses, DuPont™ Fluoroguard® is an internal lubricant that will migrate to the surface to reduce wear and abrasion and to improve polymer throughput and flow properties.
http://www.fluoroguard.com/

Clark Solutions
valves, valve actuators, pumps, dataloggers, transmitters, controllers, alarms, gages, and other instruments to control flow, velocity, pressure,æ temperature, and other properties.
http://www.clarksol.com

C&P Catalyst, Inc.
Coils, coupons prepared, cleaned, polished, sealed in inert atmosphere, for immediate use
http://www.cpcatalyst.com/