5 × 8M class 7 Hardwall Cleanroom

Find Similar Products

Product information Company lnfo.

Detail
Airflow
Installation
Testing

Cleanrooms Detail

1. Particle Count (Air Cleanliness):

The ISO 7 modular hardwall cleanroom standard defines the maximum number of particles allowed in the air based on particle sizes.

Particle Count Limits (for 1 cubic meter of air):

0.5 µm particles: Maximum of 352,000 particles/m³
1.0 µm particles: Maximum of 83,200 particles/m³
5.0 µm particles: Maximum of 3,520 particles/m³

These limits ensure that the cleanroom meets specific cleanliness levels to prevent contamination during manufacturing processes or experiments.

Differences in GMP cleanliness and microorganisms among countries.jpg

2. Air Changes per Hour (ACH):

The number of air changes per hour in an ISO 7 modular hardwall cleanroom is typically 30 to 60 ACH. This means the air in the room is exchanged 30 to 60 times per hour to maintain cleanliness and remove airborne particles.

This high rate of air exchange helps keep the concentration of particles low and maintains uniform air pressure and temperature.

3. Airflow and Pressure Control:

Laminar Flow: To prevent cross-contamination, airflow in an ISO 7 modular hardwall cleanroom is often directed in a laminar flow pattern, which means the air moves in a smooth, uniform direction, typically from ceiling to floor, minimizing turbulence.

Positive Pressure: The room is typically maintained under positive pressure relative to surrounding areas. This means air flows into the cleanroom but not out, preventing contaminants from entering the room.

Directional Airflow: The air can be filtered using HEPA (High-Efficiency Particulate Air) filters to trap particles down to 0.3 microns or smaller, further ensuring that the room meets the required cleanliness.

4. Temperature and Humidity Control:

Temperature: The temperature in an ISO 7 modular cleanroom is typically maintained within a range of 18°C to 22°C (64°F to 72°F), though this can vary depending on the specific application or requirements of the processes being performed in the room.

Humidity: The humidity level is often controlled within a range of 30% to 60% RH (relative humidity). Some industries (e.g., pharmaceuticals, electronics) may have more stringent humidity requirements, especially to prevent electrostatic discharge (ESD) or product degradation.

clean room photo6.jpg

Cleanrooms Airflow

The basic structure of clean room includes box, fan, primary air filter, high efficiency air filter, damping layer, lamps and other components. The box is usually made of industrial aluminum or stainless steel square, which is sturdy and beautiful, and not easy to rust or produce dust. The fan filter unit (FFU) is responsible for air supply, surrounded by anti-static curtains or tempered glass, and the top is covered with seamless blinds to form an airtight area. The internal purification level can reach class 100 or higher.
Working principle, FFU fan from the top of the air inhalation, through the primary filter preliminary filtration, and then through the high-efficiency filter fine filtration, filtered clean air to a certain wind speed (usually 0.45m / s ± 20%) sent out to the clean shed at a uniform speed, the formation of a uniform layer of flow, so that clean air air flow is a vertical unidirectional flow, so as to ensure that the work area of the required degree of cleanliness.

Stainless Steel Acrylic Sheet Clean Room5.jpg

Cleanrooms Installation

Preparation before installation

Before installing a clean shed, the installation environment needs to be thoroughly cleaned and disinfected to reduce the level of dust and bacteria in the air and to ensure basic cleanliness conditions. In addition, all necessary materials and tools should be prepared, such as clean shed frames, filters, sealing materials, screwdrivers, leveling scales, etc. The environment and conditions at the installation site should also be checked to ensure that there are no disturbing factors, such as dust, wind and vibration.

Installation steps

Installation environment preparation: Choose a dry, ventilated and well-lit environment for installation, avoid direct sunlight. At the same time, ensure that the construction area has enough space to accommodate the clean room and related equipment.
Assemble the frame: according to the clean room program drawings, determine the installation location and size requirements, and then start assembling the frame and support structure, usually using aluminum alloy profiles to ensure that it is stable and reliable.
Installation of high-efficiency filter and FFU fan: first install the high-efficiency filter, then install the FFU fan in accordance with the specified position, and connect the power supply, the FFU fan is one of the most important components in the clean room, responsible for generating a strong airflow, to ensure that the air circulation.
Installation of ceiling and wall panels: Use purification boards or other materials that meet the cleanliness requirements to ensure the flatness of the ceiling and wall panels, and tight seams to avoid loopholes.
Installation of lighting and electrical system: The clean room should be equipped with lighting system, including LED lamps and lanterns. When installing, the waterproof and dustproof performance of the lamps and lanterns as well as the uniformity of illumination should be ensured. The electrical system should comply with relevant national standards and industry requirements to ensure stable and safe power supply.
Grounding treatment: The grounding treatment of the clean shed should meet the design requirements to ensure the safe operation of the equipment inside the clean shed.
Acceptance and debugging: clean shed installation is completed, acceptance should be carried out. After acceptance, the clean shed debugging to ensure that the normal operation of the system to achieve the desired clean effect.

Precautions

Avoid installing the clean room in dusty, humid or salty places.
Clean the dust on the surface of the frame, FFU fan, plexiglass, etc. during installation.
Installers should wear dust-free clothing, depending on the requirements.
The installation process of the clean shed needs to be carried out in strict accordance with the regulations to ensure that the clean shed can provide a high-quality clean environment.

Cleanrooms Testing

Cleanliness Testing
Cleanliness testing is a key step in evaluating the performance of a clean room and involves a number of parameters, including air velocity, static pressure difference, suspended particles, temperature, relative humidity, noise, illumination, and settled bacteria. The testing period is usually 7 working days, and the cost and validity of the report will depend on the specific situation. The testing process generally includes signing a contract, arranging on-site sampling, laboratory testing and issuing a test report.
Clean room interior decoration requirements
The indoor decoration requirements of the clean room are equally important, the decoration materials need to be airtight, small deformation, and the concentration of pollutants in accordance with national standards. Wall and ceiling decoration should be flat, smooth, dust-free, and reduce the concave and convex surface. Ground decoration should be flat, wear-resistant, easy to clean, and not easy to accumulate static electricity. In addition, the colors in the clean room should be light and soft, and the combustion performance of the decoration materials must comply with national standards.