ZEXTER AIR SHOWER Model no.- GGT – 510
CASOLUTIONS
G.G. Technologies air showers are used before entering a clean room in order to blow off excess dust particles from clean room personnel before they enter, to minimize contamination.
Hepa filters are used to decontaminate a room by filtering out particles greater than 0.3 micrometers in size.
It is located between unclean and clean room. It is cost effective, easy to maintain and are designed to blow air in different directions.
It is widely used in clean rooms and various labs.
It is easy to operate one just need to roll it at the door of clean room plug in and ready to use.
G.G. Technologies air shower is a fully self-contained unit with high degree of maneuverability.
They are fully equipped to provide complete de-contamination solutions to the clean room or manufacturing/assembly area from personnel entering the space.
The ease of operation of our air shower is such that, one just need to roll it at the door of the clean room, plug in and it is ready to be used.
Our air showers are closed cubicles and work on the principle of subjecting the personnel through adequate velocity of clean air coming through a pre filter assembly comprising of poly fiber synthetic media of approximately 1″ thickness (washable). And then the same air is passed through a high efficiency perfect air filter made from glass pleated non-woven filter media having a minimum efficiency of 99.97% at 0.3 micron particle size.
The normal face velocity of air
coming through different jets of the air shower have a thorough cleaning effect and dislodges the suspended/stuck particles lying on the surface of the garment/body of the personnel entering the air shower and thus making him/her virtually free from the particulate matter.
TWO WAY OPERATION
In this mode, the cycle runs in both directions.
Only one door at a time can be opened. Theuser can go in.
In either direction and the air shower will cycle.
Test data has been obtained which prove that air showers are effective in reducing contamination brought into the cleanroom.
Data developed by series of tests, indicates that, depending upon the particle size, particle removal can be up to 90%.
The larger the particle, the higher the efficiency, as illustrated in the accompanying chart:
It is to be noted that proper operating protocol in using an air shower weighs greatly on its effectiveness.
Training is of utmost importance to insure reduced contamination in cleanrooms and to ensure that the air shower is operating at maximum effectiveness.
Proper protocol suggests personnel should be trained to rotate 360 degrees, with hands on their heads as illustrated during the air shower cycle to insure contamination removal is as efficient as possible.
The Air Force has very exacting standards regarding acceptable levels of contamination while at the same
PARTICLE
PARTICLE REW
equally exacting standards when it comes to investing in equipment.
In order to determine the efficacy of air showers the Air Force conducted tests of its own.
The test consisted of sending a team of twenty (20) operating personnel through two (2) air showers, one located before the entrance to the change room and the other before the entrance to the cleanroom itself witha cycle time of eight (8) seconds each.
Operators were instructed to raise their arms and make a 360° turn.
Prior to the entrance to the first air shower, outer garments are removed and stored.
Once past the first air shower, the individual enters the change room where he puts on the cleanroom garments and goes through the second air shower, entering the cleanroom.
After each test condition, the cleanroom was allowed to return to the normal contaminant level before a new test was begun and collections of samples were made.
Today’s air showers can keep a significant amount of residual contamination from entering a cleanroom workplace as long as certain criteria are met:
a. The air shower must be properly designed and sized to maintain effective and efficient operations.
b. At a minimum, HEPA filters are 99.97% efficient at 0.2-0.3 microns
c. Sufficient “wash down time” – at least 45 seconds – must be allowed in the air shower.
d. The air supplied to the shower must be finely filtered to prevent personnel from being impinged with contaminants during the actual cleaning cycle.
e. A fixed nozzle pattern must be followed and the nozzles must be preset to direct air in a downward flow to produce shearing, wash down effect.
It is essential to have a fluttering of garments strong enough to loosen dust.
f. The garments themselves must be made of material such as Tyvek®, teflon, dacron or nylon that is less likely to shed than cloth;
comfort and cost must not be the determining factor.
g. The air shower must operate at a negative pressure.
In other words, the pressure in the air shower must not exceed the pressure outside.
The pressure must be less than the cleanroom side to prevent contaminates.
h. Very importantly, personnel must act responsibly, i.e., when they stand off-center or crouch in a corner to avoid the air flow, they are defeating the whole purpose of the air shower.
The individual must center himself in the shower and execute several complete 360° turns during the 45 second duration of the air shower, with hands positioned over the head.
i. The individual must remain in the air shower for several moments as specified in the company’s protocol after it has stopped to allow enough “purge time,” or “dwell time” so that the particles may drift downward through the floor grate and are not drawn into the cleanroom by the movement of the individual as he leaves the air shower.
j. Air showers, like cleanrooms or for that matter any process equipment, must be properly maintained in order to function properly.
Lack of proper maintenance can become a major source of contamination.
APPLICATION
➤ Clean Room
Pharma Production
Micro-Electronic Fabrications and Production Units
➤ Semi-Conductor Production Lines
➤ Basic And Applied Science Research Laboratories
HIGH PERFORMANCE BLOWER SYSTEM
German made permanently lubricated, centrifugal motor/blowers with external rotor designs. Motors selected for energy efficiency, compact design, and flat profile.
Completely integrated assembly optimizes motor cooling. All rotating parts balanced for smooth, quiet, vibration-free operation.
STAINLESS STEEL NOZZLES
An array of stainless steel nozzles direct high-velocity jets within the chamber.
| Constructions | Stainless Steel sheet SS 304 sheet / S.S 316 sheet / M.S duly powder coated |
| Face velocity | 6000 ft/min + 20 feet |
| Operation Time (Adjustable) | 0-9,990 seconds Washable pre-filter unit |
| Pre Filter | (Non-Woven-Synthetic Polyester) |
| HEPA Filters | Glass pleated non-woven fabric filter having 99.97% efficiency 0.2-0.3 micron particle size |
| Air Flow | Multi Directional |
| Air Flow Control | Solid State Control Unit |
| Blower Assembly | Centrifugal lubricated bearing type ISI marked |
| Electromagnetic | Yes |
| Illumination | Fluorescent light illumination greater than 800 lux on |
| Noise level Add on features Power Requirements | Noise level less than 60 db Sequential feature operation by door mat magnetic 500 watts – 950 watts (Model specific) |
| Nominal voltage | 220-230 Volts, 50 Hz Single Phase |
| Frequency | 50/60 |
| Dimension (WXLXH) | 1mtr x 1mtr x 2mtr, 3’x3’x7′, 4’x3’x7′ |
OPTIONAL ACCESSORIES:
Microprocessor LCD controller system with velocity meter
1. Facility to change the password
2. Reset value of date & time
3. Show of velocity m/s & C.F.M.
4. To indicate the Ambient temperature
5. Fan Timer
6. Fluorescent timer
7. Filter choke alarm
8. U.S.B. Port With data Cabal
9. Timer for the shut down whole system completely
10. Reset value of date & Time
11. Velocity sensor (made in Japan)
12. U.V. Timer
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