|Even with heavy fluids, the pump’s design provides for a high suction lift. The everflo 4.0 GPM diaphragm pumps, in fact, have some of the most powerful lift capabilities of any type of pump. There are no rotors, gears, vanes, or any such mechanism to wear out over time, as some pumps do, resulting in a progressive loss in performance. Air that has been compressed and filtered, nitrogen, and Clean Dry Air are all extremely cold. Since these programs use this as their source of power actually cool themselves during operation and do not overheat.