Omega Air High Pressure FIlters or HF are used are used for commercial applications that works with pressure as high as 50 bar or 725 psi. It is made of a strong cast aluminum that makes it safe to open at high pressures. Manufacturing the HF series are in accordance with Pressure Equipment Directive PED 97/23 CE. Its operating pressure range is from 1.5°C to 65 °C (35 to 149 °F).