Testing items: air velocity and air volume, air exchange, temperature and humidity, differential pressure, suspended particles, planktonic bacteria, settled bacteria, noise, illumination and so on. Specifically, you can refer to the clean room testing standards.

A series of experiments triggered by a phenomenon that doesn't comply with the theory
Theoretically, for the same filter, the higher the airflow, the lower the filtration efficiency.
However, our engineers found in the testing process, when the velocity of the wind is high to a certain value, the filtration efficiency no longer follows the rule of decreasing with the increase in air volume, but increases with the increase in air volume.
Later on, after we checked the related information from many sources, as well as communicated with the professionals in the industry and analyzed them, we considered the following possible reasons:
1) When tested in higher air volume, the filter element strength is not enough, the structure is damaged.
2) Filter materials with high filtration efficiency under high air volume do exist.

As we all know, the highest filtration efficiency level of high-efficiency filters can reach 99.999995 or more for different particle sizes of pollution. In the past, there are always people who correspond the level of clean room with the efficiency level of high efficiency filter, and always think that the more 9 high efficiency filters are used, the cleaner the clean room can reach the cleanliness of 100 or even 10 levels.
In fact, this concept is wrong, although the high efficiency filter is the core component of the clean room, but the clean room want to achieve 100 or even 10 levels of cleanliness, high efficiency filter is not the only condition.
There are many factors affecting the cleanliness level of clean room, such as the number of air changes, door and window sealing, and personnel entering and leaving the air shower room.

Activated carbon filter is made of activated carbon filter material, because the material is composed of meltblown and other filter materials and activated carbon together, and has a filtering effect on both particulate matter and gas compounds. Some manufacturers call it a double-effect filter.Activated carbon filters are used in a wide range of applications.
Such as home air purifiers to remove grease and smoke from kitchens, odors from restaurants, smells from pets, and harmful gases from outdoors. In HAVC, clean room, etc. They are used in conjunction with high efficiency filters to ensure the air quality inside offices and workshops to maintain human health and product quality. And as automotive air conditioning filters. Thus, how to make sure that you choose the proper filter media and filter?

Products or processes in industries such as aerospace, microelectronics, pharmaceuticals, medical devices, health care and food need to be produced or carried out in clean rooms. ISO 14644 Cleanrooms and associated controlled environments-Part 1: Classification of air cleanliness specifies that the

As modern urbanization continues to accelerate, air quality issues are becoming more and more of a focus of attention. At the same time, the quality testing of air filtration materials, masks, filters and other air purification products is also very important. Air quality monitoring, air filtration products testing equipment, are inseparable from the particle measuring systems. So what types of particle measuring systems can be divided into? What are their respective principles and applications? This article will introduce in detail.

Particle measuring systems can be divided into several categories according to different principles, such as photometers, optical particle counters (OPC), aerodynamic particle size spectrometers, condensation nucleus counter (CNC) and differential mobility analyzers (DMA).

Air filter is everywhere in our daily life and work, it consists of non-woven or filter paper, adhesive, metal outer frame, etc., which can purify the air. So do you know the six major application fields of air filters?1. Air Filters in ResidenceAs people's requirements for quality of life continue

In today's environment of serious air pollution, high efficiency air filters are becoming more and more widely used in both industrial fields and people's daily lives. High-efficiency air filters are the key equipment to guarantee the air quality of indoor and clean room. In order to ensure the filtration efficiency and safety performance of HEPA filters, strict testing and verification are required. How to choose the most suitable HEPA testing equipment is a problem that should not be underestimated. This article will introduce how to choose the right HEPA filter testing equipment to obtain accurate results.

As a category of air filtration products, BSF is mainly used in anesthetic machines and respiratory machines, and the importance of the product cannot be overstated. Therefore, it is necessary to test and take in charge of the quality of the product. In this article, we will introduce BSF testing from Relationship between standards, Requirements for aerosol, Particle counting method and photometric method, Test result comparison of particle counting method and photometric method etc.

Automotive filters are crucial in maintaining vehicles' overall performance and longevity. They are responsible for filtering various contaminants and impurities, ensuring clean air, oil, and fuel reach the engine and cabin. According to application, automotive filters can be divided into four categories: cabin, oil, fuel, and air intake. Their function is to filter airborne dust and contaminants, impurities in the fuel, and impurities in the engine oil.