Maintaining a clean environment is no easy task, especially when dealing with sensitive products. In these situations, contamination control needs to be taken seriously, and that's where the unidirectional flow cabinet comes in.
If you're not yet familiar with this equipment, it's worth understanding how essential it can be for your process.
This cabin was made for ensure that the air entering the work area is always clean and be constantly directed. The goal is to create a kind of "protective barrier" around what is being handled, keeping everything free of impurities.
Unlike other equipment that protects the operator, this one has a different focus: protect the productIt is perfect for steps such as weighing, fractioning, or packaging of inputs that must not, under any circumstances, come into contact with particles from the environment.
Here at Asmontec, we develop unidirectional flow solutions that adhere to rigorous standards, such as ISO 5. And best of all, we have models with both vertical and horizontal flow to suit different types of operations and spaces.
You will find
What is the one-way flow booth for?
In a practical way, This cabin is used when the priority is to protect the product from any contamination that comes from the ambient air. It creates an area of super-clean air that moves in a single direction and forms a constant barrier, preventing suspended particles from touching the material being handled.
You will find this type of cabin being used in a variety of situations, such as:
- Weighing and fractioning of delicate raw materials;
- Packaging of cosmetic or pharmaceutical products;
- Assembly of sterile components;
- Handling of inputs in quality control laboratories.
In addition to preventing contamination from outside, it also helps prevent cross-contamination between different substances or batches, which is essential to ensure process quality and follow Good Manufacturing Practices (GMP) standards.
Important: This cabinet is not designed to protect the operator, but rather the object being handled. If you need to protect people, it's best to consider other types of equipment, such as biological safety cabinets.
How does the one-way flow system work?
Despite the technical name, the cabin's operation is quite straightforward: clean air enters and is directed steadily over the work area. This flow continuous creates a barrier against particles from the environment.
Before reaching the product, the air passes through an absolute filter (HEPA or H14), which eliminates up to 99,99% of particles. It then gently covers the work area, ensuring a controlled environment meeting ISO Class 5 standards—one of the most demanding in terms of air purity.
There are two main types of flow:
Vertical flow (MiniFlow model)
In this model, air flows downward from top to bottom, covering the entire bench with laminar flow. It's great when there's a lot of movement on the table or when you need to keep the sides clear. We have the MiniFlow I, for one operator, and the MiniFlow II, for two operators working face-to-face.
Horizontal flow (VariFlux model)
Here, the air comes from behind and flows toward the operator. It's a more compact and quieter solution, ideal for smaller spaces or tasks that require less movement. VariFlux offers excellent visibility and easy access to the work area.
Both models are designed to maintain a uniform flow, without variations that could compromise the cleanliness of the environment.
Discover Asmontec's models
Our models are designed to combine efficiency, durability, and safety. Both MiniFlow and VariFlux comply with ISO 5 requirements and offer features that make a difference in everyday life.
MiniFlow (Vertical Flow)
- Two options: MiniFlow I (one operator) and MiniFlow II (two operators facing each other);
- Structure in galvanized steel with white electrostatic paint or polished stainless steel (sanitary finish);
- Stainless steel table, easy to clean;
- Comfortable and economical LED lighting;
- UV lamp for internal sanitation (when not in use);
- 6mm tempered glass side windows;
- Noise level less than 55 dB(A);
- Options such as auxiliary socket and gas or vacuum nozzle;
- Source 220V / 60Hz / single-phase.
VariFlux (Horizontal Flow)
- Also available in electrostatically painted or stainless steel versions;
- Work table in AISI 304 stainless steel, with sanitary standard;
- Tempered glass side windows;
- LED + UV for lighting and sterilization support;
- Silent, less than 55 dB(A);
- Gas/vacuum outlet and nozzle options;
- Source 220V / 60Hz / single-phase.
What's more, we offer customized solutions, adapting our equipment to your environment and operational requirements. From design to installation, our team is ready to support you.
Conclusion
If you need to ensure the integrity of your products in an environment that requires strict contamination control, the unidirectional airflow cabinet is an indispensable ally. It provides continuous protection with clean air directly onto the worktop, whether with vertical or horizontal airflow.
Here at Asmontec, we offer robust, efficient, and customized solutions for different types of operations. The MiniFlow and VariFlux models are proof of this.
Want to know which booth is ideal for your process? Talk to our team, it will be a pleasure to help you find the best solution.





