👉 Cartridge fluid, also known as cartridge lubricant or cartridge oil, is a specialized lubricant used in cartridge pumps and compressors to ensure smooth operation and longevity. It is typically a synthetic or semi-synthetic oil formulated to reduce friction, dissipate heat, and protect the internal components of the pump from wear and corrosion. The fluid fills the internal chambers and passages within the cartridge, creating a thin film that minimizes contact between moving parts, thereby enhancing efficiency and preventing damage. Proper maintenance of cartridge fluid, including regular replacement as specified by the manufacturer, is crucial for optimal performance and preventing costly repairs.