The 2.5D automatic tank cleaner from Hammelmann Corp. removes deposits including hardened materials from internal tank walls at pressures up to 23,150 psi and flows exceeding 200 gpm. It is ideal for efficient cleaning in long vessels and towers when the rotary motion of the standard 3-D tank cleaning unit is not useful. The swing angle of the nozzle holder has optional adjustments to 35 or 83 degrees. The swing angle of the unit around its axis is optionally set at 36 or 81 degrees. It operates using high-pressure water, with the nozzle arms rotating due to the reaction force of the water jets emitting from the nozzles. This rotational motion is transferred via a built-in drive and reduction gear, which in turn rotates the cleaner around its vertical axis. By rotating on two axes, the jets can reach all parts of the tank interior. The rotation speed is controlled by an adjustable induction brake magnet. 800/783-4935; www.hammelmann.com.