Eight Tips to Keep Your Cleanroom Clean and Working Properly

Introduction

Did you know an idle human produces 100,000 particles of 0.3 micron or larger every single minute? These are predictable introductions of contaminants in cleanrooms. Similarly, operators who smoke are legally or procedurally barred from entering a cleanroom for 30 to 60 minutes to prevent any further introduction of contaminants.

Keeping a cleanroom clean requires extreme protocols and equipment operational efficiency. Cleaning spills in a cleanroom cannot be done using a simple circular scrubbing motion. In fact, doing it can get one fired. The surface needs to be wiped in straight single-direction strokes away from the clean air source towards the exhaust.

Since the cleaning protocols are strict and time-consuming, modern facilities rely on the rooms' physical design. The latest method is to use modular clearooms. They have automated systems running stably to manage dust and microscopic dirt. The operators only need to ensure that the airflow is uniform and the room's environment is steady. Using modular cleanrooms ensures quick setup and adherence to the ISO 14644-2 standard in all phases. These phases include as-built, at-rest, and operational conditions.

Ensuring that the HEPA filter units and HVAC modules are up and running is vital. Stable airflow and close monitoring of pressure cascades are vital to ensure air changes per hour, or ACH. Overall, ensuring sustained classification, strict adherence to procedures, environmental control, and preventive maintenance can keep the cleanroom clean. In this guide, we will explore the top 8 tips that will ensure a cleanroom stays clean and working.

Tip 1: Daily Cleaning

To ensure pristine surfaces, cleaning starts from a daily routine. Guide operators to monitor the air pressure inside the room in real time. Ensure that the air has high pressure in the most clean area and low pressure in the less clean area. It will ensure smoother airflow. After that, perform a visual inspection for the modular systems that typically have curved corners and flat built-in lights. These designs make daily inspection convenient and provide a one-directional, laminar air flow.

The to-do list for the operator should have inspection points for fan filter unit (FFU) status and prefilter conditions monitoring. It usually means checking the differential pressure across them. Cleanrooms are made with non-shedding material and protected from transit-induced micro damage. Therefore, validation of its cleaning system is more important than labor work.

Tip 2: Weekly Deep Cleaning

The second routine to follow is a weekly deep clean protocol. Perform them when normal manufacturing work is paused. The walls of modular cleanrooms are easy to dismantle, allowing thorough checking of the entire room. However, for weekly inspection focus is on the floors that can be lifted up (raised floor access). It allows inspectors to check for air flow underneath the floor. These are vital to ensure ISO classification remains intact during operational conditions.

After finishing the cleaning routine, perform ATP swab testing. To check for microbial presence and keep track of the performance. Use different colored trash cans to match the exact path material, and workers move. It helps prevent cross-contamination vectors.

Note: These modular cleanrooms come with chemical resistant walls that do not release harmful gases or degrade during operation.

Tip 3: Regularly Check and Change Air Path Components

During regular checks, begin with vents, HVAC return paths, and fresh air supply makeup grills. Ensure that the prefilters are not clogged and have an acceptable low differential pressure across them. If the deltaP does not improve, replace them to ensure ACH rates. Your system should have a clear MERV prefilter replacement strategy based on differential pressure trends. The strict compliance with routine will help keep the designed airflow volumes and extend the life of HEPA filters that come next in the air flow path after the prefilter.

Typically, a cleanroom requires 20-600 ACH or air changes per hour. These are essential to keep the official cleanliness level in line with ISO 5-8 classifications. They also ensure that the production equipment, like medical devices or medicines, is safe.

Modular cleanrooms have these filters placed at return air grills and makeup air grills with easy to reach height. It allows the maintenance team to check filters without having to step inside the critical zone of a clean room. As the HVAC modules come fully tested before shipment with calibrated filter housing, they do not pose alignment issues that can hinder filter performance.

Logging the differential pressure through computers and setting predictive maintenance alerts at set thresholds is the modern way. These computers help prevent catastrophic breakdown and raise contamination alerts.

Tip 4: Monthly Internal Particle Test

Every month, perform a test under fully operational conditions. As per ISO 14644-1, sampling protocols record baseline performance. Modular units come with integrated FFU arrays. It allows the maintenance team to test one small area at a time. As you can isolate zones, you don't have to shut down the entire manufacturing process. Use the internal particle counters that are calibrated as per NIST-traceable standards. Ensure that you have zero leakages in the heavy duty air filters. The chances of leaking High Efficiency Particulate Air (HEPA) filters are low, as they are tested comprehensively during commissioning and factory tests.

Pro Tip: Take monthly dust readings and compare them to the initial commissioning smoke test. Observe the changes to see how air flow has shifted before the particle counts increase.

Tip 5: Annual 3rd Party Particle Test

To ensure that your system is working as per international standards and certifications. It's vital to have an independent ISO 14644-1 certification annually. The process involves a hired external team of experts that checks the system. It proves that your monthly and daily tests are working and validates your data. It also ensures adherence to any regulatory requirements by the government.

One of the key advantages of having a modular room is that they come with specific sampling points. There is no need for modification in the structure that introduces vulnerability to contamination. They also have sensor mounting points and provide compliance documentation for faster setups. A premium manufacturer will perform a comprehensive factory performance test with CE marked components. Experts perform operational pressure cascade mapping to ensure that the product integrity is preserved before packing, shipping, and building is performed. During your annual tests, perform multi point velocity mapping to ensure that there are no dead zones where dust could accumulate.

Tip 6: Annual HVAC Maintenance

In the case of 24/7 operation, the typical maintenance schedule is not enough to ensure integrity. Twice a year, the ventilation system coil cleaning, refrigerant checks, and blower inspections should be performed. These are usually modular HVAC systems that are customized to fit your cleanroom environment.

Because the HVAC system attaches to the cleanroom as integrated modules, they feature easy-access panels and quick release filters to make sure that the repair work happens without breaching the classroom classification. Through monitoring ACH and filter differential pressure, we can see how successfully the maintenance action helped in operational particle control.

Tip 7: Repairing Damaged Cleanroom Element

After we have checked and verified the operational aspects against their optimal performance, we can deeply analyze if the structure has any damage that may need repair or replacement. Start by analyzing the walls. If you see any scratched walls or broken rubber strips around the door or lighting issues, fix them within hours. Leakage can cause pressure loss or, in some locations, create a particle ingress pathway.

If there is visible damage, then simply replace the modular panel and finish the repair the same day. A cleanroom manufacturer can provide extra spare parts alongside the original room setup for quick repairs in the future, using their modular nature. Maintain a repair log and operational assessments for future reference. Firms with skilled engineers in the research and development department can run computational fluid dynamic analysis to check any modifications or repair jobs that happen in the cleanroom. It's called digital twin modeling.

Tip 8: Proper Training of Cleanroom Personnel

Everything comes down to people who interact with the equipment. It's vital to provide basic training to new hires and a refresher course for the veterans every six months. It trains them exactly how to perform the gowning sequences, how to safely move items through air-blasting doorways (air showers) and transfer windows (pass boxes), and how to control contamination sources.

Modular cleanrooms come with dedicated gowning zones. Each of these rooms has visual aids and interlocking door mechanisms to prevent the opening of both sides at once. It naturally reinforces procedure compliance. These rooms also have clear plastic windows that allow managers to watch and instruct workers without the need to step inside and compromising sterility.

The training is not limited to workers. The maintenance personnel also learn to interpret the real-time monitoring data. They can spot the changes and fix them head on before they become an operational hindrance. It's important that we take into account the psychological safety elements and ensure that the workers are confident in their every action so that they feel less anxious and prone to stress induced errors.

Conclusion

It's important to master the daily and monthly routine to ensure that the cleanroom facility is a highly dependable production environment. Through consistent and close monitoring of the operational parameters and structural elements, you can ensure that the safety and quality standards of ISO/GMP are met. These routines are beneficial from pharmaceutical to precision chip manufacturing facilities.

If you are looking for a partner to grow your business with, then consider SZ Pharma (Suzhou Pharma Machinery Co., Ltd.). They have a complete range of modular cleanroom solutions designed by experts with rigorous quality inspection. Owing to more than a decade of experience, they have safely delivered worldwide within the prescribed time window. Visit https://www.sz-pharma.com/ to explore all their custom-built cleanrooms with exact classification required by process needs. Feel free to contact:

● Telephone: +86-18241958031 /+86-19824886686

● Fax: 86-512-65488640

● Email: pharma@sz-pharma.com

● Whatsapp/Wechat: 008618241958031

FAQs

Q: How do modular designs support faster compliance testing compared to traditional builds?

Modular designs come with built-in features that ensure faster inspection and testing. There are pre-defined test spots. There is no need to break walls to ensure proper air flow and leakages. The walls are modular and easy to dismantle and assemble for monthly or bi-annual checks.

Q: What role do pre-shipment inspections play in long-term operational reliability?

Ensuring that the cleanrooms are in line with the international standard, they are rigorously tested for ISO classification before delivery. It ensures that the HEPA filters and climate control HVAC systems work to provide steady laminar air flow across the entire volume. The result is long-term operational reliability with contamination control.

Q: Which ISO classifications are most common for medical device assembly, and why?

As per the ISO classification for medical tools, building the cleanroom should be in line with ISO 7. It ensures that the air flow speeds are ideal to keep the sensitive products clean from biological or other environmental contaminations.

Q: How quickly can a prefabricated cleanroom reach full operational status after delivery?

A prefabricated cleanroom can be assembled and brought to operation in exactly one to three days. With an experienced supplier like SZ Pharma, the shipping time and safety during transport ensure a quick setup and operation.