Fume Hood

2022-05-22

1 What is a fume hood

Fume hood is an essential clean equipment in laboratory furniture. It has the effect of ventilation and ventilation in the laboratory.

The structure of the fume hood is up and down, and there is an exhaust hole on the top, which can be installed with a fan. The upper cabinet has a deflector, circuit control, touch switch, power socket, etc. the perspective window adopts toughened glass and can move left and right or up and down. For human operation. The lower cabinet adopts the style of experimental side table, with a table top and a cabinet body below. Small water cups and taps can be installed on the table.

The material of the fume hood consists of a variety of, all steel, steel wood, all wood, aluminum wood, plastic steel, PVC structure, etc. the table top is the place where the operator is in direct contact, which is composed of solid core physical and chemical board, stainless steel board, PVC, ceramics and other materials.

2. How to select fume hood

The fume hood is not a separate equipment, and the change of external environment will affect the performance of the fume hood. At the same time, the fume hood and its control system will also affect the surrounding environment. When you choose the fume hood: first, you must consider the factors of the whole system. By material: all steel fume hood, steel wood fume hood, all wood fume hood and FRP fume hood. Secondly, you need to determine which type of fume hood you need. When choosing, you can usually measure it according to the following factors:

1. Cabinet part:

There are three styles: standard, low desktop and floor type.

Whether the surface wind speed of the fume hood meets the safety wind speed requirements specified in the international standard: 0.5m/s (the international standard stipulates that only when the surface wind speed reaches 0.5m/s can the harmful gas in the fume hood be effectively captured). Whether the opening height of the fume hood is suitable to meet your needs for operation space. Ventilation control system: constant air volume, variable air volume or adaptive control system. Lining board material: PP, glass fiber or polyethylene resin, etc. Whether the raw material of the regulating door adopts safety glued glass, and whether its design conforms to human mechanics, so that the operator can pull freely.

2. Table top: whether the table top adopts a safe dish design, so as to facilitate users to clean the table top and prevent the leakage of toxic liquid. Whether the material of the table meets your experimental needs and resists corresponding erosion and high temperature. Whether the cup groove or sink is installed, and whether the installation position is reasonable. Whether the design of air outlet is reasonable.

3. Bottom cabinet:

Whether the material is strong and durable, whether it is fireproof, and whether it can resist the erosion of the acid-base environment in the laboratory. Whether the power supply is reasonable and safe. Whether it is convenient to maintain the water, electricity and gas system. Whether the bottom cabinet needs air extraction design so that you can place volatile drugs. After you have basically selected the model, style and size of the fume hood, you can determine what you need according to the following conditions.

4. Accessories: water source: distilled water, pure water or reverse osmosis, etc. Gas source: nitrogen, oxygen or air, etc. The selection of electrical system should consider: model, voltage, anti riot, durability and so on.