Tool Free, Mess Free – Micro-QT™
Micro-QT™ and Micro-QT2™ Valve Canisters are the next generation in canister sampling devices. Micro-QT™, or “Quarter-Inch Tube” Valves, have several advantages over other canister valves. Micro-QT™/QT2™ valves minimize the volume of outside “contaminated” air that is introduced into a canister when testing vacuum or otherwise making a connection to a sampling line or GC inlet. The inclusion volume for the Micro-QT™ Valve is 0.01cc, which is ten times smaller than other miniature quick connect fittings. The inclusion volume is the “outside” volume that is introduced into a “system” when male/female valve connections are made. When testing vacuum through a Nupro® Valve, approx. 2cc of air is introduced into a canister, which is the combined volume of the Nupro® Valve and an external gauge. This is 200 times more air than using a pre-evacuated test gauge with Micro-QT™ valve fittings.
The internal Silonite® coated sealing spring in a MicroValve™ is stronger than those used in Swagelok® Miniature Quick Connects, to further reduce the potential for leaks even at cold storage temperatures (-15°C). A compression fitting cap is also available, which when used with the MicroValve™ creates a lower combined leak rate than any other currently accepted canister valve.
Note – Micro-QT™ and Micro-QT2™ valves are referred to simply as MicroValves™ when describing features common to both.