Broen Cleanline 501 fittings can be used for gases with purity coefficient up to 5.0 (99.999% clean gases). These fittings can be used when the requirements for gas purity are crucial in Laboratories. Also fittings can be used for gas chromatography, spectrometry and for non-corrosive and inactive gases, e.g. Ar, He, N2, H2, CH4. They have good pressure control for reliable service. There are also many different mounting possibilities. Each fitting is packaged in a sealed bag to maintain cleanliness. All fittings are leak tested by different pressure methods. 1 out of 100 valves is helium leak tested.