The core reason for choosing low speed for the multi-layer roller mixer bottle rolling machine is to balance the requirements of cell/microbial culture and the stability of equipment operation.

There are many reasons why multi-layer bottle rolling machines should avoid single machine multi-layer stacking, such as safety, stability, balance, resonance, and other limitations.

The reasons why the roller mixer of the multi-layer bottle rolling machine can only operate at low speed and avoid using multiple layers, high speeds, and stacking are:

1. Protecting the activity of the culture: Cells and microorganisms are sensitive to shear forces, and high rotation speeds can generate strong liquid shear forces, which can damage cell structure or inhibit growth.

2. Ensure nutrient and gas exchange: At low speeds, the culture medium can form a uniform thin liquid film, allowing the culture on the bottle wall to fully contact nutrients and smoothly exchange oxygen and carbon dioxide.

3. Adaptation to multi-layer structure: Under multi-layer design, high rotation speed can cause equipment vibration to intensify, increase mechanical wear, and may also cause splashing and overflow of culture medium. Low rotation speed can avoid these problems.

4. The operation is cumbersome and time-consuming: the stacking design results in limited spacing between layers, and the installation and removal of rolling bottles require layer by layer operation, making it impossible to take and place in batches, resulting in a large workload during large-scale cultivation.

There are limitations in space utilization: although vertical stacking saves flat space, the overall height is high, which requires a high floor height for the laboratory, and sufficient vertical operating space needs to be reserved for maintenance and cleaning.

6. Operation stability is affected by load: When multiple layers of load are uneven, vibration is easily generated, and long-term use may exacerbate mechanical wear and may also lead to a decrease in the consistency of the rotational speed of different layers of rolling bottles.

7. Inconvenient observation and monitoring: The upper rolling bottle is blocked, making it difficult to visually observe the status of the culture medium. It needs to be disassembled for inspection, which affects the real-time control of the culture process

In addition, there are many limitations such as being bulky, inconvenient to maintain, and requiring balanced debugging.

In practical applications, we have never recommended customers to choose single stacked bottle rolling machines, except for integrated ones. Many customers only feel various inconveniences after purchasing, so please carefully understand before purchasing. The multi-layer structure is very simple, and we insist on using single stacked bottle rolling machines without stacking (unless at extremely low speeds), especially under high-speed conditions. Our insistence is based on our responsibility to customers and laboratory safety considerations. For special needs, customers can choose multi-layer customized brackets to interpret multi-layer stacking needs. Please consult customer service for details.