A diaphragm pump is a type of positive displacement pump that uses a flexible diaphragm to move fluids. The diaphragm creates a vacuum that draws liquid into a chamber, and then it pushes the liquid out when the diaphragm moves in the opposite direction. This design allows for efficient pumping of various liquids, including those that are viscous or contain solids. These pumps are commonly used in industries such as chemical processing, water treatment, and food and beverage. They are known for their ability to handle corrosive fluids and provide a leak-free operation, making them a reliable choice for many applications.