A piston pump is a type of positive displacement pump that uses a piston to move fluid through a cylinder. When the piston moves back, it creates a vacuum that draws fluid into the cylinder. As the piston moves forward, it pushes the fluid out through a discharge valve. This mechanism allows for efficient and controlled fluid transfer, making piston pumps suitable for various applications. These pumps are commonly used in industries such as hydraulics, oil and gas, and water treatment. They can handle a wide range of fluids, including viscous liquids and slurries, and are known for their durability and reliability in demanding environments.