Product Description
The level of protection provided by a fume hood is affected by the manner in which the fume hood is used. No fume hood, however well designed, can provide adequate containment unless good laboratory practices are used, as follow:
• Ensure the exhaust is operating before beginning work. Check the baffles for obstructions. If the hood is fitted with an airflow monitor, check the monitor's status. Even while working, be alert to changes in airflow.
• When using the fume hood, keep your face outside the plane of the hood. Use the sash for partial protection during hazardous work.
• Work at least 6 inches back from the face of the hood. A stripe on the bench surface is a good reminder.
• Use appropriate personal protective equipment such as splash goggles and gloves. This enhances safety in case of catastrophic spills, run-away reactions or fire. Wear a full face shield if there is possibility of an explosion or eruption.
• When using large apparatus inside the hood, place the equipment on blocks, when safe and practical, to allow air flow beneath it.
• Do not make quick motions into or out of the hood, use fans, or walk quickly by the hood opening. These will cause airflow disturbances which reduces the effectiveness of the hood.
• Substitute with less hazardous or less volatile chemicals where possible.
• The hood should be kept closed, except during apparatus set-up or when working within the hood is necessary.
• Keep the hood sash closed as much as possible to maximize the hood's performance.
• Keep the sash closed when not in use to maximize energy conservation.
• If performance is suspected, or an airflow alarm is triggered (if installed), terminate usage, and close the sash completely.
• Items contaminated with odorous or hazardous materials should be removed from the hood only after decontamination or if placed in a closed outer container to avoid releasing contaminants into the laboratory air.
Product Parameters
| 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) |
Type of Fume Hood
• General Purpose, Bench Top Fume Hood
• Distillation Fume Hood
A distillation hood is characterized by a low worktop height which results in a large working height for the operator. This allows tall distillation equipment to be installed and mounted in the work chamber. Otherwise, it has similar features to that of a standard fume hood.
• Perchloric Acid Fume Hood
Perchloric acid reacts violently with organic materials. Dried perchloric acid is also highly explosive. Therefore, perchloric fume hoods require built-in water wash down systems in order to prevent perchlorate salt deposits. Interior liners are made of acid resistant materials like stainless steel. Interior corners are coved to aid in cleaning. All procedures that use perchloric acid must be confined to a perchloric fume hood, to prevent dangerous reactions with other chemicals.
• Radioisotope Fume Hood
Radioisotope fume hoods are constructed specifically to protect users from radioactive materials. They have specially constructed worktops to withstand the weight of lead shielding plates, and may also have lead laced sashes. Interiors are made of stainless steel with coved corners to aid in decontamination.
• Acid Digestion Fume Hood
Acid digestion fume hoods have special liners manufactured of acid resistant materials such as unplasticized PVC. For acid digestion applications involving high service temperatures, other materials such as PVDF may be used. Sashes may be made of polycarbonate to resist hydrofluoric acid etching.
• Floor Mounted Fume Hood
Floor mounted fume hoods are used for applications which require large apparatus. As the name implies, these hoods are floor mounted without any work surface. This facilitates the transfer of equipment and materials into, and out from the hood. Floor mounted hoods are sometimes referred to, although wrongly, as walk-in fume hoods.
• Demonstration Fume Hood
A demonstration hood has all 4 sides made of safety glass, and this hood is commonly used in educational institutions to allow students to easily view the teachers' demonstrations inside the fume hood from all angles, enhancing efficiency in teaching laboratories.
• Ductless Fume Hood
Ductless fume hoods utilize activated carbon filtration to adsorb chemical vapors and fumes. These hoods recirculate air to the laboratory, and are growing in popularity because of energy savings and the green movement.
Detailed Photos
Installation Instructions
Many fume hoods are equipped with flat or rounded sills or air foils which direct the flow of air smoothly across the work surface. Sills should not be removed or modified by the hood user. Objects should never be placed on these sills. Materials released from containers placed on the sills may not be adequately captured. In addition, an object on the sill may prevent the quick and complete closure of the sash in an emergency. Tubing is frequently used to channel exhaust to the hood from equipment located some distance away. This is not an effective control method.
Occasionally, a researcher may need local exhaust ventilation other than that provided by an existing fume hood. A new device may not be connected to an existing fume hood without the approval of the manufacturer. Adding devices to even the simplest exhaust system without adequate evaluation and adjustment will usually result in decreased performance of the existing hood and/or inadequate performance of the additional device.
Work involving harmful microorganisms should be done in a biosafety cabinet, rather than a chemical fume hood. A fume hood should not be used for waste disposal. It is a violation of environmental regulations to intentionally send waste up the hood stack.
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