The JM-R series of mechanical seal auxiliary system (liquid storage tank system) is suitable for series seals and double end seals. As a buffer or isolation liquid, the storage container is mainly composed of liquid storage tank, measuring unit, detection and control components, pipeline and control valve and other components to ensure the normal use of sealing. This series of sealing auxiliary system provides convenient visual observation window, liquid level alarm switch interface and pressure alarm switch interface. This series complies to API682 Scheme 52 (no pressure) or 53A (pressurized) systems. JR5012 series can be used when the mechanical seal shaft diameter is less than or equal to 60mm, and JR5020 series is greater than or equal to 60mm.