Type : Float
Pressure : 34 Kg/Cm2
Temperature : 38 C
Size : 3/4"
Connection : Screw NPT
Body : Stainless Steel
Armstrong 11-AV series is for High Pressure water pressure. It is installed at high point where possible Air / Gas sits and could easily be released to atmosphere.
https://www.armstronginternational.com/products-systems/steam-condensate/airgas-vents/free-floating-lever/112213-av-series