within 7 - 20 workdays after recevided the deposit
L/C, D/A, D/P, T/T, Western Union
10000 units per month
Detailed Product Description
Benchtop Fume Hood
Laboratory Cupboard Work
Granite Marble Tops Benchtop Fume Hood Laboratory Cupboard Work
work surface height
inflow air velocity
PVC, 4 meters
PP built in centrifuge blower, speed adjustable
motorized, 5mm toughened glass
AC 110/ 220V ± 10% 50/60 Hz
1.0mm cold rolled steel with epoxy resin coating
high grade melamine board with good acid and alkali resitance function
chemical resistant phenolic resin
water tap, water sink, socket*2
led lamp, built in blower
Inspection of fume hoods
When installed, fume hoods should be inspected in accordance with the American Society of Heating. It is the responsibility of the office of the university architect or facilities management to arrange for testing and intial certification of a new hood.
An air balancing specialist is hired to ensure that containment meet design criteria and taht supply and exhaust air flow are in proper proportion to establish a negative pressure diferential between the lab and the outside corridor. Exhaust flow must be greater than supply to create air movement from the hall into the lab to contain airborne contaminants
The location of the hood affects its efficiency.
Ideally, fume hoods should be located in an area of minimal traffic.
When a person walks by a fume hood, turbulence can be created causing contaminants to be drawn outside the hood.
Also, if the air diffuser is located directly above the fume hood, air turbulencemay be created causing contaminants to escape into the room.
The air flow into the room has an effect on the fume hood.
All doors and windows shold be kept closed to maintain the negative pressure of the lab with respect to the outside corridor.
This ensures thatany contaminants in the lab will be exhausted through the fume hood and not escape into the hallway.
If non-carcinogenic materials are being used the acceptable face velocity for minimally hazardous materials is 50fpm. Currently, all fume hoods are certified for work with hazardous chemicals if the air velocity is between 80 and 120 fpm. At velocities greater than 125 fpm face velocity, studies have demonstrated that the creation of turbulence causes contaminants to flow our ot the hood and into the user's breathing zone.