Vertical Laminar Air Flow

Our vertical laminar air flow has vertical direction flow and particle retention above 0.5 micron.

These are appreciated for their low noise and versatile usage. These have been designed with latest technology and can also be designed as per the specifications, provided by our clients.

Application : The vertical laminar air flow cabinets is designed to provide a high degree of protection for process products In laboratories and production facilities. Many critical applications in the medical, pharmaceutical, nuclear-power, and micro electronic fields demand an ultra-clean work environment which is free from biological and particulate contamination.

Operation : Ambient Air is draw in through pre-filter and is introduced in the work zone through the HEPA filter. The average velocity in the work zone is maintained between 0.4 and 0.5 m/s. Air cleanliness in the work zone is better than class 3.5 (100) in accordance with US FED STD 209 E

Construction : The cabinets are fabricated out of thick board duly sunmica clad or mild steel cabinet duly epoxy coated. The work table is made of thick board which is sunmica clad at top or S. S Table top will be provided as optional accessories. All joints are sealed with silastic sealant. Side panels are provided of thick transparent acrylic sheets.

The unit is fitted with pre-filter and is made to pass through highly effective HEPA (High Efficiency Particular Air) filter having efficiency rating as high as 99.997% with hot, DOP, thus retaining all airborne particles of size : 0.3 micron and larger. Using a dynamic machine, the blower and motor assembly is statically and dynamically balanced. Blowers are mounted on vibration isolation mounts to minimize vibration. The working is illuminated by fluorescent lightings fitted to the unit. Height of the working table provides comfortable “ Sit Down” working position for the operation to work on 220/230 volts AC. supply.

Standard Sizes
Air Velocity Between 0.4 to 0.5 mls +-20%
HEPA Efficiency Pre-filter 99.997% at 0.3 microns with DOP test Washable with an arrestance up to 90% at 5 microns Less than 65 dB (A)
Sound Level Lux 900 - 1300 Lux
Light Intensity Cleanliness Standard 209 E Class 100
Federal Power Supply 220 V Single phase 50 Hz

Horizontal Laminar Air Flow

Room air (in red) enters the system from behind the HEPA filter; 99.99% particle-free air is forced in a back-to-front direction across the work surface.

A horizontal laminar air flow requires additional depth to accommodate the rear-mount filter/fan unit with some additional rear clearance to allow air to enter the system. These clearance requirements necessitate a deeper bench and more floor space than a vertical flow system.

Although both airflow designs provide effective sweeping action near the filter face, their respective flow patterns eventually encounter disruptions that often tip the scale in favor of one or the other configuration. In a vertical-flow , the obvious obstacle is the work surface. A perforated or rod-top work surface allows the laminar air stream to pass through the hood with minimal obstruction, but these tops can be a problem in operations involving liquids or small parts. If you’re working with these materials and want to avoid picking up parts off the floor, a horizontal flow design may be preferable.

Yet even a solid top may not rule out vertical flow if work is performed above, not on, the work surface. If sterile or particle-sensitive processes are performed in a clean, sterile zone midway between the work surface and the filter face, a vertical flow hood is generally acceptable. As long as hands and other contamination sources move up and down, not sideways above a sample, sensitive materials will remain clean.