Many process engineering applications require precise and reliable dosing of material components to ensure that the final product meets the required quality standards. This book is divided into two parts, covering both the physical and engineering fundamentals as well as the essential application know-how of dosing pumps. Part I Fundamentals, Designs: Theory of liquid dosing technology: definition and operation of dosing pumps and the factors influencing the dosing flow; different design principles of dosing pumps and their components (dosing membranes with safety features, dosing heads and valves, pistons and their sealing mechanisms); lifespan and reasons for wear; performance range and delivery behavior of dosing pumps; overview of commercially available designs with cross-sectional images of dosing pumps.