Introduction

We at VESCA Scientific Lab instruments have been manufacturing Fume Hoods over a decade now. Our fume hoods are indispensible and pre-requisite; practically in all chemical laboratories that handles toxins and hazardous chemical fumes and effluents. Our fume hoods capture the fumes/effluents released during any given experiment, contain them in the enclosure and then emit through their well designed exhaust system.

We specialize in both standard and customized fume hoods models specifically designed to meet the challenging demands of various scientists for individual and specialized research applications. To avoid any kind of hazardous fumes or chemical effluents that might occur during the course of a given experiment and taking that in account, our fume hoods are specially conceptualized and designed to provide a work area which is free from all these possibilities.

Our fume hoods capture the fumes released during an experiment by drawing fresh air from the environment, past the user into the unit.. This way the concentration of the chemical fumes/effluents are kept at the minimum possible levels in and around the breathing zone of the user. The vector of the air in the fume hood points to the inward direction and perpendicular to the face of the user. The velocity of the air is controlled at approximately 80 feet per minute, so as to control the particle kinetics of various aerosols and diffused gases.

Some distinctive features are also been added to make it a international product and this includes Ergonomic Design, Energy Efficient Mechanism, Low Noise Levels and Conforms To ASHRAE-110-1995 (British Standard) Testing Method. Talking about the build ups our fume hoods are developed to be used as semi closed ventilated enclosures so as to protect the user from harmful and toxic fumes and vapors and to eliminate the possibility of accidental fire, which may be resulted due to the emission of inflammable gases during the course of a given experiment.

Hence the material of construction of all our fume hoods are carefully chosen between industrial grade fire resistant commercial wooden boards covered with laminated sheets and lined completely with epoxy coating/FRP lining or corrosion resistant steel sheets having epoxy coating from inside, duly painted with attractive stove enamel/air drying spray paint. The work table is made out of heavy gauge construction material fortified with acid proof glazed tiles/ stainless steel grade ss-304. The work bench is provided with a small sink made of stainless steel grade ss-304.

Features

» All our fume hoods are provided with sliding sash made out of special grade shatter proof glass duly framed in wooden/aluminum frame with sliding motion and counter weight balanced mechanism. Our units ensure minimum illumination level of approx 800 lux on the work table.

» The unit is equipped very diligent heavy duty exhaust system, comprising of dynamically balanced centrifugal impeller with high speed motor of approx 1440 RPM (Three Phase-Crompton Greaves) which is controlled by DOL starter. Our fume hoods ensures that the optimum face velocity of 80 feet -100 feet per minute is maintained with an accuracy of +10 feet/minute with the sash in complete open position.

» These hoods are capable of maintaining a constant exhaust volume. The maximum variation permissible due to baffle adjustment, in our in house test procedure is 6% of the given volume of exhaust. Our fume hoods conform to the performance test as per ASRAE-110-1995 British Standards of testing performance of chemical hoods. They have an AM (As manufactured) rating of 0.05 ppm/4 LPM at fully opened sash.

» Our Fume hoods are designed to minimize the loss of static pressure at a given baffle opening position. As per our standard procedures the average loss of static pressure at any given four points at ninty degree angle and 3 duct dia from the fume hood will not exceed 75 feet per minute at 0.25 inch, with full sash opening and face velocity of 100 feet per minute.