Wanner Hydra-Cell® positive displacement diaphragm pumps feature a seal-less pumping chamber so there are no seals, packing or cups to leak or replace. The seal-less design and check valves enable Hydra-Cell to handle abrasives and particulates that would damage other types of pumps. In addition, Hydra-Cell can run dry indefinitely without damage to the pump. The multiple-diaphragm design of Hydra-Cell provides virtually pulse-less, linear flow without the need for expensive pulsation dampeners.