These cones are designed to optimize the saturation of gases in water, and can obtain gas transfer efficiencies of up to 100%.  The operation of the cone is simple: water and gas (either pure oxygen, ozone or other gas) enter from the top where the velocity is reduced as the body of the vessel expands. As the water moves to the bottom of the vessel, the gas rises to the top and is constantly sheared.  The undissolved gas keeps returning to the top, and when adjusted properly, only water without bubbles can exit the bottom. At higher pressures, the dissolved oxygen concentration may be increased significantly above saturation. These cones may be operated at a pressure of up to 21 psi.  No matter what concentration of dissolved oxygen is needed. All our cones are manufactured with vinyl ester resin to allow for a greater resistance to ozone.