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An air shower is the first line of defense at the entrance of cleanrooms, food factories, and laboratories. It removes dust and particles from personnel and materials before they enter controlled environments.
However, many users still face common issues such as poor cleaning performance, reduced air velocity, or sensor failures.

This SEO-friendly guide explains air shower selection, operation, troubleshooting, and maintenance in a clear and practical way.

1. How to Choose the Right Air Shower

When selecting an air shower, don’t focus only on size or appearance. Performance depends on several key technical factors.

1.1 Air Velocity

• Nozzle air velocity should be ≥ 25 m/s

• Effective velocity on the body should be ≥ 18–20 m/s

• Insufficient velocity means dust on sleeves, backs, and shoes will not be removed effectively

• Choose reliable high-air-volume, low-noise centrifugal fans to ensure long-term stability

1.2 Material Selection

• 304 stainless steel: Recommended for pharmaceutical, food, biotech, and humid environments due to corrosion resistance and easy cleaning

• Cold-rolled steel with powder coating: Cost-effective option for electronics and general cleanrooms

• Floor plate: Stainless steel flooring is strongly recommended for durability and hygiene

1.3 Filtration System

• Standard configuration: Pre-filter + HEPA filter

• HEPA filtration efficiency: ≥ 99.99% (H13 level or higher)

• High-quality filters offer longer service life and stable resistance

1.4 Nozzles and Airflow Design

• Multi-directional adjustable stainless-steel nozzles

• Typical configuration:

  • Single-person air shower: 12 nozzles

  • Double-person air shower: 24 nozzles

• Recommended nozzle angle: 30°–45° for full body coverage

1.5 Control System & Interlock

• Electronic interlock system: Only one door can open at a time

• PLC intelligent control

• Adjustable blowing time: 10–99 seconds

• Infrared sensors for automatic operation

2. Correct Air Shower Operation

Personnel Air Shower Process

1. Remove outer clothing and personal items before entering

2. Enter the air shower and close the door

3. Air shower starts automatically

4. Raise arms and rotate slowly for full dust removal

5. Exit after the cycle ends

Material / Cargo Air Shower Use

• Place cleaned and sealed packages inside

• Close the door and allow the preset cycle to finish

• Open the inner door to transfer materials into the clean area

3. Common Problems and Quick Troubleshooting

Power & Fan Issues

• No power: Check main switch, control panel, and emergency stop buttons

• Fan not working: Ensure emergency stop is released

• Low air speed: Possible incorrect power phase or clogged filters

Sensor & Door Problems

• No automatic start: Clean infrared sensors

• Door won’t open: Check electronic lock alignment

• Doors locked during operation: Normal behavior

Poor Cleaning Performance

• Reduced air velocity: Filters may be clogged

• Uneven airflow: Nozzle blockage or incorrect angle

• Excessive noise: Fan bearings or dust accumulation

4. Air Shower Maintenance Guide

Filter Maintenance

Pre-filter (G4)

• Clean every 1–3 months

• Replace after multiple cleanings or visible damage

HEPA Filter (H13/H14)

• Check resistance every 6–12 months

• Replace when resistance exceeds 450 Pa

• Ensure correct airflow direction and airtight sealing

Fan & Mechanical System

• Inspection every 3 months

• Noise level: ≤ 65 dB(A)

• Lubricate bearings every 6 months

Nozzles & Air Ducts

• Clean nozzles weekly with compressed air

• Inspect air ducts every 6 months to prevent dust buildup

Sealing & Structure

• Check door seals every 3 months

• Use neutral cleaning agents for stainless steel surfaces

• Avoid strong acids, alkalis, or high-concentration alcohol

5. Acceptance Checklist After Installation

• Air velocity test: ≥ 25 m/s at nozzle outlet

• Interlock test: Only one door opens at a time

• HEPA leakage test (if required)

• Visual inspection: Material, dimensions, and finish

• Air pressure balance with HVAC system

6. Common Air Shower Specifications (Reference)

Note: Sizes and configurations can be customized.

Conclusion

An air shower is not just a doorway—it is a critical contamination control device.
Choosing the right specifications, using it correctly, and maintaining it regularly ensures long-term performance and cleanroom compliance.

If you need help selecting the right air shower model, optimizing cleanroom layout, or planning maintenance schedules, our technical team is ready to provide customized professional solutions.