How To Adjust The Make-up Air Volume of A Fume Hood

Adjusting the make-up air volume of a fume hood is a process involving multiple aspects and steps. The following are the detailed methods and precautions for adjusting the make-up air volume of the fume hood:

First, the adjustment method

Confirm the status of the make-up air inlet:

First of all, make sure that the make-up air inlet has been opened. If the make-up air outlet is not opened, the make-up air volume naturally cannot be adjusted.

Check the air supply effect:

Place your finger on the make-up air inlet and observe whether it can adhere. If it can be adsorbed, it indicates that the supplementary air volume might be too small. If it cannot be adsorbed, it indicates that the supplementary air volume is too large or normal.

Adjust the make-up air volume:

If the make-up air volume is too small, it needs to be increased. This can usually be achieved by adjusting the opening degree of the make-up air outlet or the rotational speed of the make-up fan. The specific operation methods may vary depending on the equipment model and manufacturer. It is recommended to refer to the equipment manual or contact the manufacturer for guidance.

If the make-up air volume is too large, it needs to be reduced. Similarly, this can be achieved by adjusting the opening degree of the make-up air outlet or the rotational speed of the make-up fan.

Monitor the indoor environment

During the process of adjusting the make-up air volume, it is necessary to monitor the indoor environment in real time, such as temperature, humidity, and air pressure, to ensure that the make-up air volume and exhaust air volume remain balanced and avoid excessive fluctuations in the indoor environment.

Second, precautions

Do not change the protective equipment and the sealing between the equipment at will:

During the process of adjusting the make-up air volume, do not change the protective equipment of the fume hood and the sealing between the equipment at will, so as not to affect the protective effect.

Turn off the indoor equipment:

Before adjusting the make-up air volume, it is recommended to turn off all indoor equipment to avoid the impact of wind pressure changes on the make-up air volume adjustment.

Be familiar with the equilibrium position:

During the process of adjusting the make-up air volume, it is necessary to be familiar with the balance position. Arbitrary adjustment is strictly prohibited to avoid unnecessary trouble.

Test the fume hood:

After the adjustment of the make-up air volume is completed, the fume hood should be tested to ensure that its make-up air volume has been adjusted to the standard and can meet the requirements of the laboratory.

Consider external environmental factors:

External environmental factors such as temperature, humidity and air pressure may also have an impact on the make-up air volume. When adjusting the make-up air volume, these external environmental factors should be fully considered and corresponding measures should be taken.

Third, intelligent regulation

With the development of technology, many laboratories have introduced intelligent risk control systems. These systems can automatically adjust the make-up air volume according to the real-time experimental conditions, ensuring that both safety standards are met and resource waste is avoided. If the laboratory is equipped with such a system, its functions can be fully utilized to simplify the adjustment process of the make-up air volume.

In conclusion, adjusting the make-up air volume of a fume hood is a process involving multiple aspects and steps.