The good or bad use effect of the laboratory fume hood is not only related to the correct design, but also has a great relationship with the reasonable use and maintenance. Therefore, the following precautions and maintenance methods should be observed:
Notes
(1) Before starting the experiment, it must be confirmed that the fume hood is in operation before the experimental operation can be carried out.
(2) Before the end of the experiment, the ventilator should be continued to run for at least 5 minutes before it can be turned off to discharge the residual gas in the pipeline. You can also consider installing an exhaust time delay device to ensure that the ventilator runs with a delay.
(3) During the experiment, do not place any equipment within 150mm of the glass window. Large experimental equipment should have sufficient space and should not affect the air flow. The front window should be closed as much as possible during use.
Maintenance
(1) During the experiment, the experimental device that produces harmful substances should be placed in the fume hood at a place where the operation opening is greater than 150MM to prevent the overflow of harmful substances.
(2) The experimental device in the fume hood should not block the exhaust slit.
(3) After the experiment is completed, the fan should not be turned off immediately. It should be turned off after 3 to 5 minutes.
(4) The fume hood should not be used as a storage cabinet.
(5) The interior of the fume hood should always keep the inner surface smooth and airtight. It should be cleaned and cleaned thoroughly regularly. If there is any damage, it should be repaired in time.
(6) The ventilator, air duct and related accessories should be overhauled regularly.
(7) After a certain period of time, the fume hood should be measured and adjusted once to make the fume hood operate under the designed conditions.
(8) For the temperature inside the fume hood, if it is an electric furnace with a large wattage, a backing plate should be placed. It is not suitable for long-term storage and opening to avoid affecting the use of the fume hood.
Suzhou Pharma Machinery Co.,Ltd.
2025/06/09
Icey
