Here are 5 things people should know about Horizontal Laminar Flow Hood

Here are 5 things people should know about Horizontal Laminar Flow Hood Laminar flow hoods establish a regulated work surface for applications that require that particulate contamination is not present. These hoods do away with contamination by producing a constant surface airflow. Laminar means literally a flow or happens along constant streamlines, without turbulences.

Laminar flow hoods simply provide air streams, which travel in the same direction and at the same speed. This eliminates any swirls of airflow, which could cause random and uncontrolled results. The availability of laminar flow hoods spans two main categories-horizontal and vertical. As its name implies, horizontal laminar fluxes are horizontal with airflows, whilst vertical laminar fluxes provide a vertical downward flux.

People are placed to protect it downstream of their work but are left vulnerable to any pollutants that are not filtered out until they enter them. For this reason, horizontal laminar flow hoods can only be used with materials of hazard level 2 and 3. The air turbulence that occurs in vertical laminar airflow hoods is not a factor, since the airflow is guided horizontally through the work surface rather than directly at it. Larger samples can however interfere with the airflow or contaminate downstream samples. The advantages of the horizontal laminar airflow include making it easier for people to access their work because there is no sash to open and close; and any particles that their gloves pick up are less likely to contaminate the sample because they are downstream.

However, because the filtration system is placed at the back of the laminar hood rather than stacked vertically, the horizontal systems require more laboratory space. Another drawback of horizontal laminar airflow hoods is that the entire cabinet typically needs to be moved to change the filter.

Here are 5 things people should know about Horizontal Laminar Flow Hood: 1. It is good for ISO 5 environment- Horizontal laminar flow hood with filtration of the rear wall, Made of all seamless polypropylene. Since air blows directly to user, the samples are less polluted by hands and gloves. Good option for applications involving an ISO 5 environment such as IV preparation, non-biological tissue processing, electronic assembly, compounding of nonhazardous medications, parts inspection or assembly of optics.

2. Length of Horizontal laminar flow hoods - They are available in lengths of 3 to 8 feet and can be used for vibration prone applications without work surfaces. The worktable can be inserted inside the hood and isolated from the hood. If people don't use large or voluminous equipment on the work surface and want to ensure the lowest turbulence level, horizontal flow may be best for them. Horizontal laminar flow hoods may reduce the risks of contamination from operators because the hands are located downstream of the airflow.

3. Provide effective sweeping - Horizontal laminar flow hood provides effective sweeping action near the filter face, and eventually their respective flow patterns encounter disruptions that often tip the scale in favor of one configuration or another. A perforated or rod-top surface of work allows the laminar air stream to pass through the hood with minimal obstruction, but these tops may be a problem in liquid or small parts operations. When people work with these

materials and want to avoid picking parts off the floor, a horizontal nature of the flow could be preferable.

4. It must be helpful to stay safe from contaminated - A flow hood is usually appropriate if sterile or particle-sensitive processes are conducted in a clear, sterile zone at halfway between the work surface and the filter face. As long as hands and other forms of contamination travel up and down and not sideways over a sample, sensitive materials remain safe.

5. Check the effect of air leaving- Consider the effect of air leaving the laminar flow hood on operators. Although horizontal laminar flow does not encounter large obstructions within the hood with air flowing from the rear of the hood and exiting the front opening, it eventually encounters the individual doing the works. Some irritating substances can be blown onto the operator's ears, such as soldering gases or fine powders. Although this collision does not disrupt the laminar flow where the work is performed, it may pose a risk to safety.

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