Blue indication ring:
Needle headwork for non-toxic, non- corrosive, non-burning 4.0 gases (Air, Nitrogen, Carbon Dioxide, Argon, Helium etc.) and Oxygen
Open/closing function: 3 x 360°.
Allowable pressure test after installation: 1.5 x max. working pressure without function of the valve.
Leak rate: 15 mm3/sec. at 6 bar compressed air (differential pressure method).