Fluid Mixing Technologies

A bottom entry mixer, also known as a bottom-mounted mixer, is a type of agitator designed to be installed at the bottom of a tank or vessel. It is immersed directly into the liquid, providing effective mixing and agitation from the bottom upward. Bottom entry mixers are commonly used in various industries for blending, suspension, and dispersion processes. Here are some key features and considerations for bottom entry mixers:
Placement and Immersion: A bottom entry mixer is installed at the bottom of the tank or vessel, with the agitator shaft and impeller fully immersed in the liquid. This placement ensures efficient mixing and allows for uniform distribution of the agitated components throughout the vessel.
Agitator Design: Bottom entry mixers typically feature various types of impellers based on the specific application requirements. Common impeller designs include propellers, turbines, hydrofoils, and pitched blade turbines. The impeller design is selected based on factors such as the viscosity of the liquid, desired mixing intensity, and flow pattern required for the process.
Mixing Efficiency: Bottom entry mixers offer excellent mixing efficiency as the impeller agitates the liquid from the bottom, creating circulation and promoting the mixing of components. The upward flow generated by the impeller helps disperse particles, break up agglomerates, and ensure uniform blending or suspension of materials.
Mounting and Sealing: Bottom entry mixers are typically mounted to the tank or vessel using a flange, support bracket, or other secure attachment methods. Proper sealing mechanisms, such as mechanical seals or magnetic couplings, are employed to prevent leakage and maintain the integrity of the vessel.
Maintenance and Cleaning: Bottom entry mixers should be designed for easy maintenance and cleaning. Some models offer quick disconnect features, allowing for easy removal and installation of the mixer without draining the tank. Easy access to the impeller and shaft simplifies maintenance tasks such as cleaning or replacing parts.
Bottom entry mixers are commonly used in industries such as Bioreactor, bio-fermenters, food and beverage production, and pharmaceutical manufacturing. When selecting a bottom entry mixer, consider factors such as the tank size, liquid viscosity, mixing requirements, power source availability, and compatibility with the process materials.