The best Air Valve for HPLC:

Suitable for analytical and preparative HPLC
Whether 1.5 or 400 ml per minute: You only need one valve for all applications.
Luer-Lock-Adapter
For simple gas injection of your solvents or for attaching drying tubes.
PTFE-FIlter
Filters out dust and dirt particles from the ambient air, and keeps your solvents clean.
Valve Membrane
Blocks solvent vapours for optimal health and environmental protection. Integrated check valve prevents the evaporation of solvents.
More visible Exchange Indicator (6 months*)
Activate the exchange indicator at the push of a button - so you won't miss a change again. For better visibility, we have attached the exchange indicator to the side.
Labelling Field
If you would like to enter your change date yourself, simply turn the exchange indicator around! So you always have both options..
UNF 1/4" 28G Thread - fits all caps!
No matter which generation of safety caps or other caps you use - the universal UNF connection always fits.

The latest air valve generation protects you from solvent vapours and keeps your HPLC system clean. Now with exchange indicator and labelling field - so you won't miss a change again!