A proportional valve continuously and variably regulates flow or pressure based on an electrical control signal – typically 0-10 V or 4-20 mA. Unlike a conventional on/off valve, the valve's opening degree can be adjusted steplessly throughout its entire operating range, enabling precise and reproducible process control. The proportional valve is central to automated dosing, mixing, and pressure regulation and is widely used in pharmaceutical production systems, as well as in the food and beverage industry, where accurate control of ingredient quantities, temperatures, and flow rates is crucial for product quality.