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Fume hood is a device designed for work with toxic or hazardous chemicals with the effect of safely capturing the harmful gases, vapors, and fumes generated and exhausting them to the outside air. The fume hood is very effective if installed and used properly and maintained in good working order. Fume hoods are not just fixtures but are installed into the ventilation system of a building and so affect the ventilation of the entire building and the exhaust at the stack.Choosing the right chemical fume hood is essential to ensure safety from hazardous chemicals and vapors in your lab.
You should be familiar with the standard operating procedures of the equipment and maintain them throughout the process.
-Check Ductless in proper condition
-Keep your body out of the hood to prevent various infections
-Use protective equipment such as glasses, a lab coat and gloves. Such equipment will protect you in case of dangerous leaks.
-Close the hood window when not in use.
-Stop immediately if you suspect a malfunction or when you notice an airflow malfunction.
-Carefully read the manufacturer's instructions before use.
| Model Specification | WJ-1500A | WJ-1500B | WJ-1800A | WJ-1800B |
| External dimensions of equipment(mm) | 1500(W)*1205 (D) *2400 (H) | 1800(W)*1205 (D) *2400 (H) | ||
| Dimension of works pace (mm) | 1260(W1)*780(D1) *1100 (H1) | 1560(W1)*780(D1) *1100 (H1) | ||
| Panel material | 20+6mm thick butterfly ceramics | |||
| Material of internal lining board | 5mm thick ceramic fiber board | |||
| Diversion structure | Lower air return | |||
| Control system | Button control panel (LCD panel) | |||
| PH value control | The medium is alkaline water solution; manual monitoring, and manual control through acid pump and alkali pump. | |||
| Input power | Three-phase five-wire 380V/50A | |||
| Current for air fan | Not over 2.8A(380V or 220V can be directly connected) | |||
| Maximum load of socket | 12 KW(total of 4 sockets) | |||
| Water tap | 1 set (remote control valve + water nozzle) | No | 1 set (remote control valve + water nozzle) | No |
| Water discharge way | Magnetic chemical pump strong discharge | |||
| Using environment | For non-explosion indoor use, within 0-40 degrees Celsius. | |||
| Applicable fields | Inorganic chemistry experiment; Food, medicine, electronics, environment, metallurgy, mining, etc. | |||
| Ways of Purification | Spray sodium hydroxide solution, no less than 8 cubic meters/hour | Spray sodium hydroxide solution.no less than 12 cubic meters/ hour | ||
| Ways of surface air speed control | Manual control (through the electric air valve to adjust the exhaust air volume or adjust the height of the moving door) | |||
| Average surface air speed | 0.6-0.8 m/s Exhaust air volume: 1420-1890m3/h (when door height h =500mm) | 0.6-0.8 m/s Exhaust air volume: 1760-2340m3/h (when door height h =500mm) | ||
| Speed deviation of surface air | Not higher than 10% | |||
| The average intensity of illumination | Not less than 700 Lux; Standard white and uv-free yellow LED lamps; The illumination is adjustable. | |||
| Noise | Within 55 decibels | |||
| Flow display | White smoke can pass through the exhaust outlet, no overflow. | |||
| Safety inspection | No spikes, edges; Charged body and the exposed metal resistance is greater than 2 mQ; Under 1500V voltage, no breakdown or flashover occurred for 1min test. | |||
| Resistance of exhaust cabinet | Less than 160 pa | |||
| Power consumption | Less than 1.0kw/h (excluding power consumption of fans and external instruments) | Less than 1.2kw/h (excluding power consumption of fans and external instruments) | ||
| Water consumption | Less than 3.2L/ h | Less than 4.0L/ h | ||
| Performance of wind compensation | With a unique wind compensation structure, the volume of the wind will not cause turbulence in exhaust cabinet and will not directly blow to the staff (need to connect to the air compensation system of the laboratory) | |||
| Air volume regulating valve | 315mm diameter flanged type anti-corrosion electric air flow regulating valve (electric contact actuator) | |||
• Quiet and efficient work
• Filter toxic substances in the air
• Suitable for any type of work in laboratories. Comes in different and varied sizes.
• Maintains the health of employees
• Easy and quick installation
• Durable, efficient and convenient
• Maintains laboratory equipment and materials themselves
Why are fume hoods necessary?
Ensuring staff protection against dangerous fumes, chemicals, gases and vapours - fume hoods are an undoubtedly necessary part of lab equipment. Whenever laboratory activities include work with hazardous substances, it is improtant to perform these procedures under a fume hood. In addition to protecting personel, fume hoods are also helpful in protecting the object of experiment and the environment nearby (from the exhausted vapours).
How do fume hoods work?
Fume hoods work like many other ventilation systems, as they draw in and capture the air. The difference with laboratory fume hoods is that they filter out all of the hazardous air gases, vapours, fumes, etc. After that, depending on the fume hood design, they either blow out the cleaned air outside of the building or back to the laboratory room.
What are the types of fume hoods?
Laboratory fume hoods are usually classified according their shapes and sizes:
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