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AIR CURTAIN Invisible dust has a telling effect on sensitive electronic equipment. It goes without saying prevention is always better than cure. Dust prevention is no longer a luxury but a necessity in almost all spheres of life.
AIR
Models: Acm-4106-l
CUR
TA I N
TECHNOCRACY PVT. LTD.
Models: • Acm-4106-I
®
AIR
CUR
TA I N
AIR CURTAIN
TECHNOCRACY PVT. LTD.
®
AIR CURTAIN
Invisible dust has a telling effect on sensitive electronic
•
Heated units give a feeling of welcoming warmth as
equipment. It goes without saying prevention is always better
the customer enters the space, plus the entrance
than cure. Dust prevention is no longer a luxury but a
remains dry.
necessity in almost all spheres of life. •
the energy efficiency of the building.
Application • • • • • • •
•
Pharmaceuticals & Food Industries Laboratories Clean Rooms Computer Facilities Cold Storages Show Rooms & Restaurants Electrical & Electronic Industries
The air velocity is optimized to reduce entry of insects, pollen and dust, while not disturbing occupants.
•
Weiber air curtains are elegantly styled and installation is simple.
•
Superior motor technology ensures reliable operation and long life span.
Features •
The reduction in drafts through the openings increases
Weiber air curtains are quiet enough not to disturb occupants, allowing efficient continuous operation in all installations.
•
The seasons in which doors can be left open are extended with air screens. Customers are attracted to shops with open doors.
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AIR CURTAIN
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AIR CURTAIN
powder coated. Corners are rounded without break lines.
5.1 Scope
The cabinets have good finish and the access panels and the The scope of this section comprises the supply, erection, testing and commissioning of Air Curtains units conforming
mountings are so provided for easy removal. All the nuts and bolts visible are nickel coated.
these Specifications and in accordance with the requirements of the Drawings and of Schedule of Quantities.
5.5 Blower housing
5.2 Type
The blower housing are constructed of CRC Sheet and are powder coated, and shall be engineered to provide the
The Air Curtain units are Non Re-Circulating, preferably
required outlet velocity with minimum noise level.
installed horizontal to the ground. Installed with anchor fasteners to the wall or mounted to the ceiling or frame with proper supports. The discharge nozzle shall be uniform all through, and the Air curtain shall fully cover the Door opening.
5.6 Fans Fans installed in Air Curtain are centrifugal, forward curved double inlet, lightweight dynamically balanced made in Aluminum. Impellors shall have Die Cast Aluminum doubleended Hubs. Ring and Back Plate are made of 16 SWG
5.3 Capacity
Aluminum Sheet and Blades are made in TABLOCK Design, The Air Curtain should be sized according to the width of the Door, and Air throw shall be selected as per the height of the
with 22 SWG Aluminum Sheet. Performance of Impellor is tested as per AMCA Standards and Guaranteed.
Door, or the capacities shall be as shown on Drawings and indicated in Schedule of Quantities.
5.7 Motor
5.4 Cabinets
Motor are 220 ? 10% volts, 50 cycles single phase, four pole START & RUN type capacitors. Motors have been provided
Cabinets are constructed of 18 SWG CRC iron sheet steel and
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®
with Thermal overload protectors. The Core is made in
Frequently Asked Questions Weiber Air Curtains
.CRNO. (Cold Rolled Non Oriented) Silicon Sheet. Motors have extended shaft on both the sides, with 15mm as the shaft Diameter. 5.8 Motor Mounting
Should the "Weiber" air curtain be mounted inside or outside the Room? •
A "Weiber" air curtain will operate with equal efficiency
on either side of there are general rules to remember as Motor Mounting have been so provided that it should have
follows: Whenever installing an air curtain the door should
24 Nos. of vibration isolators between each motor and the
open the opposite without rupturing the curtain. Exceptional
chassis, so placed that it can dampen vibration in all the axis
situation can be only when open for a very long time.
i.e. X, Y and Z. Vibration isolator are made in silicon rubber, to resist Temperature rise.
•
When used over freezer doors or cold room, outside
installation is fans tend to gather moisture and freeze, which 5.9 Painting
eventually form a snow tangential flow fan causing it to lose operational efficiency, ifmounted l If there are people
Powder Coating is done on the unit. The colour of the powder used is Ivory from Asian Paints Grade HYG320, else any other, if specified. Proper treatment shall be done on each
working inside, near the door opening, an outside suggested because of the humming sound from the unit in operation, sound to dissipate.
panel before powder coating. • 6.0 Noise Level Maximum speed < 60 db Minimum speed < 50 db
As a dust barrier, we suggest to install the air curtain on
the cleaner l Going by a thumb rule, an air curtain should be installed - for best absorption duct at floor level - on the opposite side of the source of what prevented i.e. for the
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prevention of conditioned air losses, on the warmer think of
each curtains the air pattern will go across the width but is
vertically installed units for horizontal air drafts only under
irregular as one air looses much of its velocity by the time it
cases, are conducive for such an installation.
reaches the ground.
How far above the doorway should the "Weiber" air
How far beyond the edge of the curtain chassis does
curtain be mounted?
the air spread is the depth?
It is advisable to install the air curtain around one half two
Since the air leaves discharge nozzle at a very high velocity,
inches above whenever possible. The closer to the door top,
the curtain two inches on each side. The depth of the curtain
the more effective will curtain can be hung away from the
air is about one foot away from the discharge nozzle.
wall, if there is any hindrance for formation. But adequate care needs to be taken to cover the sides between curtain formations.
When would a vertical mount be feasible? When installation is not possible over the top of the doorway,
What happens, if "Weiber" air curtain used is much
the "Weiber" mounted along the door opening and the air flow run horizontally. Due unit operates efficiently in vertical
smaller than the width of the door?
position. It is wrong to install an air curtain smaller than the width of the door unprotected area on the sides. In an ideal situation the air curtain should completely with one inch overlapping
How long does it take to install an "Weiber" air curtains?
on either sides of the door frame protection. Competitive
The average time required to install the unit is around two
manufacturer sometimes supply incorrect units us. Their
hours. After installation the time can usually be cut to 1 1\2
units contain extreme side deflectors to spread the air on
hours.
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Micro processor Based HOT AIR OVEN
When an "Weiber" air curtain is mounted over a cooler
If the velocity of an air curtain is too great how can it be
doorway, can removed and the air curtain allowed to
slowed
operate continuously? Velocity can be slowed down by using pre-filters at the intake YES. The "Weiber" air curtain is equipped with continuous
to restrict suction grill. This restriction should not be used
duty motors and many years, trouble free.
while using the air curtain and dust.
What happens to the air when it hits the ground?
What happens when man or material goes through an entrance curtain mounted over it? Is the air curtain still
When the air reaches the floor level it will divide, sending the
effective?
air partially simultaneously and causing a drift both ways at the floor line. When using the "Weiber" air curtain for insects
When used over warehouse or entrances for the purpose of
and dust control, the directional outlet nozzle should be
keeping insects curtains efficiency will not be affected by the
directed outward not only to repel the insects allow the least
passage for man or material.
amount of air to come inward when hitting the floor. If mounted on the outside of the doorway and used for the
What is a micro switch and when is it used
purpose of refrigerated rooms when the door is open, the
A micro switch is used to start the air curtain when the door is
directional vanes should outward. Mounted on the inside of
open and is closed, to avoid continuous operation of the
the freezer or cooler the vanes should the refrigerated
curtain. There are various switches used - such as plunger
rooms.
type, roller type etc. However, it is always the micro switch
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and allow "Weiber" air curtain to operate continuously,
air displacement place sufficiently. If this is the case, blow off
opening and closing of the doors, since any and every air
the dust or other material a high velocity industrial blower.
curtain takes RPM to full load RPM, by which time a human Can filters be used in front of a suction side?
being is well past through Can a micro switch be used on all types of doors?
YES. Filters can be used in conjunction with suction grill or
NO. They will not work on swinging doors that open both
along. Filters an excessive amount of dust and dirt in the air. Can the "Weiber" air curtain be used to hold in extreme heat
ways. They doors that open one way, sliding doors and roll-
inside industrial ovens?
up doors/shutters.
YES. As long as the air curtain is mounted on the outside of
If air leaving the nozzle does not seem to have much
the oven. the more effective the installation as the percent of
velocity reason?
air loss is held to
a. The cause is probably incorrect rotation of the tangential
What type of maintenance does the "Weiber" air curtain
flow fan. three phase motors. If this is the problem, two wires
require?
to the motor within the motor, need to be reversed for correct rotation.
All motor's & units have lifetime lubricated sealed ball bearings making unnecessary. But blowing or wiping dust off
b. The tangential flow fans / pre-filters are choked, hence the
the fans and motor whenever advisable to ensure maximum performance.
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