Bakeries need keep its production are free from pest like flies , insects and dust . Apart from pest control chemicals mechanical means are used to achieve hygiene and food safety objectives . One of the important equipments for such application are industrial air curtains . These industrial air curtains are installed in places of high movement of material and personnel thus impossible to have doors installed . This high movement of men and material gives a chance to pest and dust to enter bakery production halls . Putting air curtains provides a barrier to pests ( flies , dust , insects , birds )and other harmful particles
Principle of Industrial Air curtains
These are similar blowers with metal casing .,impellers are installed on a common shaft which rotates at very high rpm producing high velocity airs . This high velocity air is further accelerated through nozzles fabricated with air curtain body . Air is thrown at very high velocity which acts as barrier to pest which cannot penetrate this wall . Materials and personnel movement is not impacted . Very effective for bakeries in a way that there number of passages connecting production halls to admin bloc / finished good godown / raw material stores / maintenance workshop and stores /mixing halls etc . Various types of air curtains are available for such application as per manufacturers specification of door/passage width and height . Energy efficient air curtains are available to save energy.Auto start and stop limit switches provided to synchronised it with opening and closing of doors.
Filter pads are provided at intake of impellers.
Air curtains are fixed on the doors with fasteners and requires minimum of maintenance . Industrial air curtains can be seen in hospitals , food service units , food manufacturing units . Apart from hygiene application they also used as barrier for seperating air conditioned areas to hot areas in food manufacturing units.
Another advantage is that it need not to be replaced as in the case of pvc door curtains.
Air curtains are installed normally at doors , passages connecting to production hall or other passages and doors connecting visitor s areas to factory . It replaces conventional method of doors provided with door springs which get s ineffective after some period .
Normally we have to check the dimensions for doors and passages before buying
length ( width ) and height
Velocity = 20 -25 m/s ( available at the floor level ) - this velocity has been suggested to produce best results .
Door limit switches which starts and stops when door opens or closed .
Industrial Air curtains can be classified into following category
Single blower air curtain Multiple blower air curtain High velocity air curtains Low velocity air curtains Auto or manual start and stop . Air curtains with heaters .