Air Showers

Technical specifications of Air Showers

Model	Tunnel – 1	Tunnel – 2	Tunnel – 3	Tunnel – 4	Air Shower w/o Bottom Board
External Dimension (mm)	1290 x 800 x 2060	1540 x 1000 x 2050	1540 x 1200 x 2050	1540 x 1600 x 2050	2100 x 2100 x 2050	2300 x 5200 x 2150
Internal Dimension WxHxD (mm)	800 x 760 x 1910	800 x 960 x 1910	800 x 1150 x 1910	500 x 1550 x 1910	800 x 1960 x 1910	800 x 4960 x 1910
Nozzles	6 – One Side	12 – Two Sides	16 – Two Sides	18 – Two Sides	24 – Two Sides	60 – Two sides
Blow Power	550W	100W	1500W	2000W	2200W	7500W
HEPA Filter Dimension	550 x 610 x 120 – One Piece	610 x 610 x 120 – Two Pieces	915 x 610 x 120 – Two Pieces	1220 x 610 x 120 – Two Pieces	610 x 610 x 120 – Four Pieces	610 x 610 x 120 – Ten Pieces
Suitable Person	1 Person w/ one side blowing	1 Person w/ two sides blowing	1 – 2 Persons w/ two sides blowing	2 – 3 Persons w/ two sides blowing	Cart
Nozzle Diameter	33 – 38MM
Air Shower Time	0 ~ 120 seconds Adjustable
Spurt Wind Speed	17~26 m/s
Power	440V AC, 50 Hz, Three Phase Connection
Filter Efficiency	99.99 %
Cleanliness Level	Class 1000/ Class 100/ Class 10/ Class 1
Noise level	Less than 55 db
Shower jet velocity	More than 20±2 meter/second
Door	Steel fabricated with safety glass & electromagnetic locks
Construction	GI Powder coated / SS 304 / 316 Stainless steel
Standard fittings	Fluorescent light Pre-filter (washable) HEPA filter Nozzle (Fixed or Adjustable) Emergency stop buttons (both sides) Blower motor assembly Anti-slip floor Doorbell Door closers Door handles
Optional	Infrared sensor auto sliding door PLC controller w/ touch screen ULPA filter Validation Documents – DQ / OQ / IQ / PQ
Design Options	One-way entry Two-way exit type & customized Design

Air Shower Design Considerations

Air shower designs and configurations accommodate precise requirements for industry, as well as the number of people using the cleanroom. Modular cleanroom entrance systems also simplify shipping and assembly.

The quantity of people that need to enter a cleanroom in each amount of time will have a major impact on the size of the air shower and filtration system that is needed. Designs range from single batch systems where one person uses the shower at a time, to tunnel systems for bigger groups to pass through quickly. Tunnels are becoming more common because of the quantity of cycle time required for a shift change.

 Using a 90-degree design, users enter on one side and exit to the right or left at a 90-degree angle. This allows the air shower, with nozzles on two opposite walls cleanses the workers easily. In this configuration it has less air nozzles than the straight-through design and needs the worker to turn 360 degrees to ensure that they’ve been thoroughly purified. 

• Other designs may have dual doors or even three doors for entry and exit. Configurations include cart/parts-cleaning air showers, which are used for conveyors, carts, pallets and constant-part operation. 
• Low-profile air showers accommodate facilities with ceilings less than 96 inches. 
• ADA compliant air showers are sized so a wheelchair can turn around in the air shower.

How an Air Shower Works

Air showers function likewise to automated car wash pressure washer systems, using several steps throughout the decontamination procedure. The following cleanroom air shower specifications procedure details the operational characteristics of a cleanroom air shower. 

1. The worker passes through the entrance door and a sensor triggers interlock magnets, which lock the air shower and cleanroom doors.
2. Several adjustable nozzles blow high-velocity streams of Class 100 clean air onto the worker.
3. The high-velocity air generates a flapping effect on clothing which produces a cleansing action, eliminating particulates from cleanroom garments.
4. To make sure all particles are removed, workers raise their arms and revolve in place.
5. Indicator lights signal at the end of the cleaning sequence, and the cleanroom door opens.

Moreover, it takes four to eight seconds of cleaning time and another two to four seconds for the air shower to eliminate contaminated air before the worker can exit. Computerized microprocessors control the cleaning and wait times linked with the air shower decontamination procedure.

Construction of Air shower

As for their construction appearances, Air showers are generally made of stainless steel. They contain two doors; one for entrance and another one for exit, with a gasket and electromagnetic interlocking system that prevents its simultaneous opening and while the cleaning cycle is in progress. In case of emergency, Air showers are equipped with an internal and external push-button that terminates the operation and blocks off the doors. The interlocking device of the doors averts the simultaneous opening of both, thus creating an efficient barrier that prevents the exchange of air between areas of different classification and therefore, the transmission of particles.

The equipment has a programmable controller, which manages all the operating parameters of the equipment, including the flow of people, the triggering time of the fan, or the delay in opening the doors. Its process is produced by a presence detector once the doors are locked. An emergency button is installed inside the cabin to interrupt the air cleaning cycle and unlock the doors if needed.

The operation, duration and characteristics of the cycle, and even the chance of differentiating between input and output cycles are completely programmable and adjustable according to the user’s requirements through a simple control system, which lets the equipment operate automatically.

Application industries

• Defence research Lab
• Pharmaceutical Industry
• Chemical Laboratory
• Animal Facilities
• Gold Producers
• Cloth Manufacturer
• Semi-conductor Laboratory
• Electronics Industry
• Food Testing Laboratory

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