| All industries. For applications where a constant product pressure is a must To keep a constant pressure, the free flow section at the valve seat is reduced or enlarged by the valve cone. Via the valve shaft, the cone is connected to a regulating membrane, which will be backed up with air at a set pressure DN25 - 50 2" 6 bar (87 psi) 7 bar (101 psi) 135°C (284°F) |