air-curtain

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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.

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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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