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| Type: | Slit Type |
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A fume hood (sometimes called a fume cupboard or fume closet) is a type of local ventilation device that is designed to limit exposure to hazardous or toxic fumes, vapors or dusts.
A fume hood is typically a large piece of equipment enclosing five sides of a work area, the bottom of which is most commonly located at a standing work height.
Two main types exist, ducted and recirculating (ductless). The principle is the same for both types: air is drawn in from the front (open) side of the cabinet, and either expelled outside the building or made safe through filtration and fed back into the room. This is used to:
-protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes)
-protect the product or experiment (biosafety cabinets, glove boxes)
-protect the environment (recirculating fume hoods, certain biosafety cabinets, and any other type when fitted with appropriate filters in the exhaust airstream)
Secondary functions of these devices may include explosion protection, spill containment, and other functions necessary to the work being done within the device.
| Model Parameters |
YT-1500A | YT-1500B | YT-1500C | YT-1800A | YT-1800B | YT-1800C |
| Size (mm) | 1500(W)*865(D)*2400(H) | 1800(W)*1205(D)*2400(H) | ||||
| Worktop Size (mm) | 1260(W1)*795(D1)*1100(H1) | 1560(W1)*795(D1)*1100(H1) | ||||
| Worktop | 20+6mm Ceramic | 20+6mm Ceramic | 12.7mm Solid Physiochemical Board | 20+6mm Ceramic | 20+6mm Ceramic | 12.7mm Solid Physiochemical Board |
| Liner | 5mm Ceramic Fibre | 5mm Compact Laminate | 5mm Compact Laminate | 5mm Ceramic Fibre | 5mm Compact Laminate | 5mm Compact Laminate |
| Diversion Structure | Back Absorption | |||||
| Control System | Touch-Tone Control Panel (LED Screen) | |||||
| Input Power | 220V/32A | |||||
| Fan Power | Less than 2.8 A | |||||
| Socket Max. Load | 5KW | |||||
| Faucet | 1 Set | |||||
| Drainage Mode | Natural Fall | |||||
| Storage | Double-Lock, Corrosion-Resistant, Damp-proof, Multi-layer Solid Wood with Mobile Wheel | |||||
| Application | Indoor No-blast, 0-40 ºC | |||||
| Application Field | Organic Chemical Experiment | |||||
| Face Velocity Control | Manual Control | |||||
| Average Face Velocity | 0.3-0.5 m/s Exhaust: 720-1200m³/h | 0.3-0.5 m/s Exhaust:900- 1490m³/h | ||||
| Face Velocity Deviation | Less than 10% | |||||
| Average Illumination | Less than 500 Lux | |||||
| Noise | Within 55 dB | |||||
| Exhaust Air | No Residue | |||||
| Safety Test | In Accord with International Standard | |||||
| Resistance | Less than 70Pa | |||||
| Add Air Function | Distinctive Structure (Need Exclusive Add Air System) | |||||
| Air Flow Control Valve | Dia. 250mm Flange Type Anti-Corrosion Control Valve | Dia. 315mm Flange Type Anti-Corrosion Control Valve | ||||
Every fume hood needs a blower, and it is often misconceived that a blower comes attached to a fume hood. Will there be a dedicated blower (exhaust fan) for this hood, or will it connect to a central exhaust system? If it connects to a central system, will it be constant volume or variable air volume?
Built-in blowers are easier to install (and therefore less expensive), but they can be noisy and they put the ductwork under positive pressure, so they should be reserved for non-hazardous applications, short duct runs and instances where a remote blower cannot be installed (such as a mobile lab).
Remote blowers, though more complex to install, can be sized for the specific situation and keep the ductwork under negative pressure for safer operation.
Will the duct go directly to the roof, or does it need to make some turns before reaching the roof? What diameter of duct will be used? Once the duct penetrates the roof, a final 90-degree elbow will be needed to turn the duct horizontal, then three to five feet of straight duct is needed between the elbow and blower.
Finally, the exhaust stack should include a zero-pressure weathercap (not a gooseneck, mushroom cap or anything that would block the exhaust from discharging in a vertical, up direction), and should terminate at least 10 feet above the roofline to allow the fumes to reach the airstream and not be returned into the building's air handling equipment.
• Hoods should be evaluated by the user before each use to ensure adequate face velocities and the absence of excessive turbulence.
1. What chemicals or particulates are going to be used in the Fume Hood?
There are general hoods, ductless hoods, powder hoods, acid hoods, explosion proof hoods and many more specialty hoods. Identifying the chemicals that will be used in the hood as well as the particulates and chemical volumes and methods that will be performed in the hood will help to determine which type of hood best fits the application. Also along these lines, will hot plates or other heat producing items be used in the hood?
2.What service fixtures are needed in the hood?
There are many types of services and accessories that are typically found in a hood. Vacuum, water, and gas lines are the most common service fixtures added to hoods, and airflow monitors, sash stops and auto sash returns are the most common accessories.
Ask yourself how many service fixtures you will need and where to locate them. How many electrical outlets? Is a sink needed and what is the desired placement?
Airflow monitors are recommended. What type is best for your lab--simple red light/ green light indication or digital airflow readout?
3. On what are you going to place the fume hood?
Is there available existing bench space? Do you need to place the hood on chemical storage cabinets where acids, solvents and general chemicals can be stored safely? Most hoods require a specifically designed work surface. Do you want your work surface to be dished to contain spills or to include a sink?
4. Who is going to install the fume hood?
Proper installation is very important in fume hood systems. Blower adjustments may need to be made, electrical and service connections are critical and a final certification of airflow and containment should be done.
You should study your budget and determine if you are interested in spending a little more in the initial purchase of the hood in order to save thousands of dollars over the life of the hood. Balancing purchase price and operation costs should be given much consideration throughout your hood selection process.
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