To determine whether a high-efficiency filter needs to be replaced, it is necessary to combine core indicators such as resistance changes, filtration efficiency decline, and physical condition checks, rather than relying solely on usage time. The following are the specific methods and criteria for judgment: I. Core judgment Index: Resistance (pressure difference) reaches the upper limit The resistance of high-efficiency filters will increase with the increase in usage time (as the filter material gradually clogs due to the adsorption of pollutants). When the resistance reaches the following thresholds, it must be replaced: Standard threshold: The operating resistance reaches twice the initial resistance (industry-wide standard). For example, the initial resistance of the new filter is 150Pa. When the resistance rises to 300Pa during operation, it needs to be replaced. Manufacturer threshold: For some special filters (such as ULPA ultra-high efficiency filters), manufacturers will indicate the upper limit of resistance (such as 400Pa), which should be followed first. Principle: Excessive resistance will lead to a decrease in air volume (affecting the air change rate in the clean room), a sharp increase in energy consumption (increasing the load on the fan), and the filter material is approaching the clogging limit. Continuing to use

The service life of high-efficiency filters is significantly influenced by factors such as environmental cleanliness, the performance of the pre-filtration system, and operating conditions, typically ranging from 6 months to 3 years. The specific duration should be determined based on the following scenarios: I. Core Factors Affecting Service Life Concentration of environmental pollutants Highly polluted environments (such as chemical workshops and dusty workshops): There are many pollutants and large particles, and filters are prone to clogging. Their lifespan is usually 6 to 12 months. Moderately polluted environments (such as ordinary laboratories and food workshops): The amount of dust is moderate, and the lifespan is approximately 1-2 years. Low-pollution environments (such as medical operating rooms and electronic clean rooms): There is less daily dust and strict pre-filtration, with a lifespan of up to 2-3 years. The effectiveness of the pre-filtering system Primary and medium-efficiency filters serve as the “protective layer” for high-efficiency filters. If the pre-filter is replaced regularly (1-2 months for the primary filter and 3-6 months for the medium filter), it can intercept over 80% of large particle pollutants, and the service life of the high-efficiency filter can be extended by 30% to 50%. If the pre-filter fails (such

The cleaning frequency of high-efficiency filters (HEPA/ULPA) should be comprehensively determined based on their type, usage environment, and the accompanying pre-filtration system. However, it should be clear that the vast majority of high-efficiency filters are made of disposable filter materials (such as glass fiber, PTFE membrane, etc.), and it is strictly prohibited to reuse them after cleaning. The following is the specific explanation： I. Why can’t high-efficiency filters usually be cleaned? The filter material of high-efficiency filters is ultrafine fibers (with diameters ranging from 0.5 to 2μm), which form dense pores (below 0.3μm) through a complex three-dimensional structure. Particles are captured by principles such as interception, diffusion, and inertia. During cleaning (such as with water, cleaning agents, or compressed air), the structure of the filter material can be damaged, causing fiber breakage, enlarged pore size, and a significant drop in filtration efficiency (possibly from 99.97% to below 90%). The pollutants adsorbed by the filter material (such as bacteria and chemical particles) cannot be thoroughly removed, and after cleaning, they may become secondary pollution sources. The sealing rubber strips and frames of some filters may age due to contact with liquids or cleaning agents, resulting in air leakage. Ii. Special Circumstances

As a key component in the clean air conditioning system, the daily maintenance of DOP supply air outlets is crucial for ensuring the cleanliness of the supply air and the operational efficiency of the system. The following are detailed key points for daily maintenance: Cleaning work Surface cleaning: Wipe the outer surface of the supply air outlet with a dry, lint-free cloth every week to remove dust and stains. If there are stubborn stains on the surface, you can dip a small amount of neutral cleaner and gently wipe it, then dry it with a clean lint-free cloth to avoid the residue of the cleaner affecting the quality of the air supply. ​ Filter cleaning: It is recommended that the primary filter be cleaned every 1-2 weeks. It can be taken out and blown from the reverse side with compressed air to remove the dust on the surface. If the filter is severely contaminated, it can be rinsed with clean water (the water temperature should not exceed 40℃), dried, and then reinstalled. It should be noted that one should not use irritating cleaning agents to clean the filter to avoid damaging the filter material. ​ Inspection and tightening Regular inspection:

The sterilization principle of xenon light is mainly based on the destructive effect of the high-intensity broad-spectrum light (especially ultraviolet rays and high-energy visible light) released by xenon lamps on microorganisms.

The Xenon pass box is an important device used in laboratories, clean rooms, and other places to maintain a clean environment when transferring items. Its core function relies on the sterilization effect of xenon lamps and the airtightness of the equipment. Daily maintenance should focus on ensuring sterilization efficiency, equipment sealing performance, and operational stability, as detailed below I. Daily Maintenance: Basic inspection and cleaning Inspection of appearance and operational status Before daily use, check whether the equipment shell is damaged or deformed, whether the door body can close smoothly, and whether the door lock is firm (to avoid a decrease in cleanliness due to poor sealing of the door body). Start the equipment and check whether the xenon lamp is lit normally (if it flickers or does not light up, problems with the lamp tube or circuit should be checked in time). Also, check if there is any abnormal noise during operation (which may indicate motor or fan failure). Internal cleaning After each use, wipe the inner cavity of the transfer window, the shelves, and the inner side of the door with a lint-free cloth dipped in 75% alcohol or neutral detergent to remove residual stains and microorganisms (to

If you need an enclosed and controlled environment for clean zones, a clean room may be your good choice. A clean room is a local air purification equipment, which can provide an environment at a higher cleanliness class. It is good at dust control, sound control and safety. It can be built and install quickly.

When you are searching for issues about quality control, you may feel confused. Because sometimes you can see “quality assurance”. “quality control” and “quality assurance” sometimes are used in a mix. But actually, they are different and they shouldn’t be used with the same meaning. What is Quality Assurance (QA)? Quality assurance is to plan production activities & requirements and ensure these requirements will be fulfilled in the whole developing and manufacturing process. Take a new high-end watch production for example. QA has to do watch research, evaluate watch design, analyze watch sales and business, contact client’s specific requirements, etc. During these processes, QA can foresee the potential problems which haven’t yet happened to the watches. Then QA will pre-define the production processes and standards to prevent these problems. What is Quality Control (QC)? Quality control is a practical activity to inspect and test the products and the production process to ensure the finished products meet quality standards. Still take the new high-end watch production for example. QC inspect watches have been produced. QC finds and rejects defective products, like watches with scratches or painted the wrong color. These defective watches will be asked to rework to ensure the goods

When you are searching for issues about quality control, you may feel confused. Because sometimes you can see “quality assurance”. “quality control” and “quality assurance” sometimes are used in a mix. But actually, they are different and they shouldn’t be used with the same meaning. What is Quality Assurance (QA)? Quality assurance is to plan production activities & requirements and ensure these requirements will be fulfilled in the whole developing and manufacturing process. Take a new high-end watch production for example. QA has to do watch research, evaluate watch design, analyze watch sales and business, contact client’s specific requirements, etc. During these processes, QA can foresee the potential problems which haven’t yet happened to the watches. Then QA will pre-define the production processes and standards to prevent these problems. What is Quality Control (QC)? Quality control is a practical activity to inspect and test the products and the production process to ensure the finished products meet quality standards. Still take the new high-end watch production for example. QC inspect watches have been produced. QC finds and rejects defective products, like watches with scratches or painted the wrong color. These defective watches will be asked to rework to ensure the goods