To protect workers from toxic fumes and to protect specimens, the laboratory is equipped with a laboratory smoke hood. This is a mandatory laboratory equipment that must be safely installed in a laboratory that deals with chemical and toxic research and similar applications because it is used every day.
To keep toxic fumes out of the lab work area and to protect workers and specimens from this smoke, laboratory smoke hoods are installed. This is part of a closed workspace that is ventilated and does exhausting work outside the lab area. This requires a small space in the laboratory but has a depth of interior work that can be used to allow sufficient space to conduct experiments.
Tempered safety glass is positioned at the rear, and the high side and window display provides superior visibility to show chemical experiments or to observe how students or workers conduct experiments. This unit has a fixed hood and a sling that can be raised to facilitate loading and cleaning, and is opened or closed to maximize or minimize access to airflow. For analysis of trace metals and corrosive substances, especially nissui indonesia laboratory hoods designed with corrosion-resistant thermoplastics, it is recommended for installation.
The efficiency of a smoke hood is measured by the speed of air flow between the work surface and the sling. This is measured in units of feet per minute and the greater the surface velocity of the hood, the faster the toxins and vapors come out. There is a recommended surface velocity of the hood for the amount of air needed to reach the laminar flow rate and that is 100 feet per minute.
Usually laboratory smoke hoods prevent exposure to vapors and poisons and there are different hoods designed to work at different speeds for various chemical and technological applications. There are two types of hoods - radioisotope hood systems and perchloric acid systems. The first type is made of stainless steel which prevents the absorption of radioactive elements. Perchloric acid hoods prevent the accumulation of volatile perchloric salts throughout the sewage system.
There are five types of standard construction available to meet conventional requirements, bypass, variable air volume, bypass, additives, and without channels. The conventional type facilitates a constant volume of air regardless of the height of the sling.
Bypass hoods combine designs that provide additional room air even when the sling is down or closed. Variable air volume hoods are technically sophisticated to keep the air speed constant regardless of the sling height.
If energy savings is a factor, laboratory assistants emit smoke that supplies outside air through the bypass hood thereby reducing the air volume of air-conditioned room or room heating. It contains extra controls to adjust the surface velocity of the air to match the position of the different sling. Ductless laboratory steam hoods are able to recirculate air to the laboratory after the filtration system works. This hood uses a higher HEPA filter to remove air contaminants.
Excellent laboratory steam hoods have high filtration performance. This must have replacement parts and technical support for installation and maintenance, and must be monitored regularly for efficiency.
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