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In air conditioning systems for high-purity environments such as cleanrooms, fan-filter units (FFU) are one of the core devices for achieving air cleanliness control. Through their efficient air filtration and stable airflow distribution, FFU ensure the purity and uniform distribution of indoor air. They work collaboratively with dry coil units (DC) and other components to maintain cleanroom environmental conditions.      High-Efficiency Air Filtration and Airflow Distribution  FFU, with their built-in HEPA filters, remove airborne particles, including dust, bacteria, and viruses, ensuring that the air delivered to the cleanroom meets high cleanliness standards.   FFU also utilize their built-in fans to create stable vertical laminar or turbulent airflow, preventing localized contamination. This stable airflow is crucial for maintaining cleanroom cleanliness, especially in the semiconductor manufacturing and biopharmaceutical industries, where cleanliness requirements are extremely high.    Cooperation and Application Scenarios  In dry coil systems, FFU work collaboratively with dry coil units (DC) and other components, such as the main air handling units (MAU). The MAU is responsible for introducing and processing outdoor fresh air, removing particulate matter through primary and secondary filtration, and conditioning the fresh air to the specified temperature and humidity.   The fresh air treated by the MAU is mixed with a portion of the return air, filtered by the FFU, and then delivered to the cleanroom. The indoor air is cooled or heated by the dry coil before being recirculated to the return air duct and mixed with the fresh air, forming a closed-loop air circulation system.   The FFU operates continuously to maintain air circulation frequency and ensure indoor air cleanliness. The dry coil adjusts the chilled water flow or temperature based on temperature sensors, handling only the sensible heat load and avoiding interference with temperature and humidity control. This clear division of labor improves overall system performance and reliability.   Among the many FFU products available, the KLC FFU is an excellent choice on the market for its superior performance and flexible design. Utilizing KLC's proprietary high-efficiency filters, the KLC FFU achieves highly efficient air filtration, ensuring high indoor air cleanliness.     Its compact design makes it easy to install and maintain, while also offering low noise levels and high energy efficiency, meeting the requirements of various cleanliness levels. The KLC FFU also offers flexible installation options and intelligent control options, enabling single-unit manual control or group monitoring of multiple units, adapting to cleanroom applications ranging from small to large-scale.   The KLC FFU has demonstrated outstanding performance in practical applications, particularly in fields such as semiconductor manufacturing, biopharmaceuticals, and precision electronic assembly, providing users with efficient and reliable air purification solutions. Its efficient filtration performance and stable airflow distribution effectively prevent condensation from contaminating wafers, ensuring a sterile environment in pharmaceutical production while also safeguarding the accuracy and stability of the equipment.   The KLC FFU's low noise operation and energy-efficient design also excel in cleanrooms with stringent environmental requirements, making it an ideal air filtration option.   As the core air filtration device in dry coil systems, the FFU provides a reliable solution for high-purity environments such as cleanrooms through its efficient filtration capacity and stable airflow distribution. Its synergistic operation with the dry coil and other components further optimizes system performance and reliability.   In fields such as semiconductor manufacturing, biopharmaceuticals, and precision electronic assembly, the FFU has become a critical piece of equipment for maintaining high-purity environments, ensuring efficient and stable production processes.

In modern industrial production, cleanliness is a critical factor in many industries, such as food processing, electronics manufacturing, and biomedicine. To ensure a clean and sterile production environment, air showers have emerged as an efficient and essential device. They serve not only as a physical barrier but also as an invisible guardian, ensuring product quality and safety.    Necessity and Importance  Air showers are the essential gateway between non-clean areas and clean areas. Their importance lies in their ability to effectively reduce dust, particles, and bacteria introduced by people and goods entering and exiting the cleanroom, thereby maintaining high cleanliness levels within the cleanroom. This equipment uses high-pressure clean airflow to fully drench the human body, rapidly removing attached contaminants and providing a solid defense for the cleanroom.    Multiple Functions and Intelligent Applications  Air showers are more than just simple showering equipment; they incorporate a variety of intelligent features. For example, smart air showers provide voice prompts to guide users through the showering process, improving efficiency while ensuring a thorough cleansing experience. Furthermore, the front and rear doors of the air shower room feature electronic interlocking, preventing the ingress of unpurified air and further enhancing its function as an "airlock." In terms of automated control, modern air showers generally utilize PLC intelligent control. LED displays provide real-time information on the air shower's operating status, the interlocking status of the two doors, and the progress of the shower cycle, providing operators with clear and intuitive feedback. Furthermore, the introduction of infrared sensing automatic showering technology makes the air shower process more intelligent and user-friendly, reducing manual operation while improving showering accuracy and efficiency.      Wide Application and Scenario Adaptability  Due to its wide applicability and flexibility, it has been widely used across various industries. In the food industry, it helps reduce cross-contamination within production workshops and ensure product hygiene quality. In electronics manufacturing, it effectively prevents dust from affecting precision equipment, improving product yield and reliability. In the biopharmaceutical industry, it is a critical device for maintaining a sterile environment and preventing microbial contamination. Furthermore, various types and specifications have been developed to meet the needs of different industries and scenarios, such as single-person single-blow air showers, multi-person double-blow air showers, and corner air showers, to meet the needs of different occasions. Furthermore, a variety of materials are available, including stainless steel, steel plates, and color-coated steel plates, to meet the corrosion resistance and aesthetic requirements of different environments.

In hospital clean areas, you might often see gleaming stainless steel Pass Box. While seemingly ordinary, they're actually "invisible guardians" of infection control.    1. Rust-Free = Safer  Ordinary Pass Box can rust and peel over time, becoming a breeding ground for bacteria. Stainless steel, on the other hand, is corrosion-resistant and easy to disinfect. For example, while hydrogen peroxide fumigation is commonly used in operating rooms, ordinary materials might corrode, but stainless steel Pass Box can withstand it.    2. Sealing Comparable to a Safe  Pass Box used in hospitals must be "leak-proof." For example, when chemotherapy drugs are delivered in a pharmacy, a loose seal could allow toxic particles to escape. High-quality stainless steel Pass Box feature an airtight design, preventing even air from escaping.      3. Unexpected Function: Labor Savings  Hospitals have calculated that traditional Pass Box require frequent manual disinfection, while stainless steel Pass Box with self-cleaning features (such as UV light and high-efficiency filtration) save over 200 man-hours annually.    Conclusion:  Do you think hospitals are just obsessed with appearance? In fact, every design is a race against microorganisms.  

We are thrilled to announce that KLC will be at CLEANFACT & RHVAC VIETNAM 2025! This is the premier event for the cleaning, sanitation, and HVAC-R industries in Vietnam, and we can't wait to be a part of it.    BOOTH No:  A43 11–13 September 2025   Join us to: Explore our latest innovations in air filtration. Engage in insightful discussions on the future of clean air technology.   Connect with our experts and discover solutions for your needs. Let's collaborate to shape a healthier, cleaner future. We look forward to seeing you there!  

In chip manufacturing plants, even a speck of dust as small as 0.1 microns can render an entire wafer scrapped; in sterile operating rooms, bacterial intrusion directly threatens surgical safety. In these environments, where cleanliness is crucial, HEPA filters serve as the "last line of defense" protecting the air.   KLC As an industry service provider with years of experience in air purification, we'll break down the technical secrets of HEPA filters and how they create a clean barrier for various industries.    Basic Principles of HEPA Filters    1. Physical Interception: Micron-Scale "Air Screening"   Using ultrafine glass fibers or composite filter media, nanometer-scale pores (over 1,000 times smaller than the diameter of a human hair) are formed between the fibers, acting like a precision sieve that directly intercepts particles larger than these pores. The Shangjing HEPA filter utilizes a gradient pore design, achieving a 99.9% interception rate for particles larger than 5μm.   2. Inertial Collision: Traps Particles   When airflow suddenly changes direction while passing through filter media fibers, larger particles (0.5-10μm) are deflected by inertia and directly collide with and adhere to the fibers. This principle is particularly critical in the high-speed airflow systems of semiconductor plants, quickly capturing fine debris generated by metal processing.     3. Diffusion Effect: A "Brownian Motion Trap" for Nanoparticles   Viruses and nanoaerosols smaller than 0.1μm experience random motion due to molecular thermal motion, increasing the probability of contact with the filter media. Our electrostatically charged filter media technology improves diffusion efficiency by 30%, achieving a 99.99% filtration efficiency for the novel coronavirus (approximately 0.1μm).   4. Electrostatic Adsorption: Giving the Filter Media a "Magnetic Coat"   The electret treatment imparts static electricity to the filter media. The charged fibers can attract particles of opposite charge, even polarizing neutral particles. In PM2.5 control scenarios, this technology can increase the filtration efficiency of submicron particles to over 99.97%.    Its Function and Role in Cleanrooms    Stability Does Not Require Compromise   1. Providing Ultimate Air Purification High-efficiency filters effectively remove tiny particles, bacteria, viruses, and other harmful substances from the air, ensuring that the air cleanliness within the cleanroom meets predetermined standards. In chip manufacturing workshops in the electronics and semiconductor industry, air cleanliness requirements are extremely high. Even the smallest dust particles can cause chip defects and affect product quality.     High-efficiency filters effectively remove airborne particles 0.3μm or smaller, typically achieving a filtration efficiency of over 99.97% for particles as small as 0.3μm. Some ultra-high-efficiency filters even achieve filtration efficiencies as high as 99.9995%, providing a nearly dust-free clean air environment for chip manufacturing and meeting the stringent air quality requirements of the production process.   2. Maintaining a Stable Clean Environment High-efficiency filters operate continuously and stably, providing uninterrupted, highly efficient filtration of air entering the cleanroom, thereby reducing the accumulation and spread of particulate matter within the cleanroom. They not only prevent the intrusion of external contaminants but also rapidly remove pollutants generated by human activity and production processes, helping to maintain a stable cleanliness within the cleanroom and achieve a dynamic cleanroom balance.   In medical operating rooms, the movement of personnel and the operation of equipment generate a certain amount of dust and microorganisms. High-efficiency filters continuously filter the air, effectively removing these pollutants and maintaining a high level of cleanliness within the operating room, thereby reducing the risk of surgical infection.   In precision instrument manufacturing workshops, the production process may generate trace amounts of pollutants such as metal debris and dust. High-efficiency filters quickly remove these pollutants, ensuring the air in the workshop remains clean, providing a stable environment for precision instrument manufacturing and safeguarding the accuracy and performance of products.   3. Protecting Downstream Equipment and Products   In cleanrooms, high-efficiency filters are typically installed at the end of the air handling system, providing the final purification step for air entering the cleanroom. This not only ensures the cleanliness of the cleanroom environment but also protects downstream equipment and products from contamination and damage from harmful airborne particulate matter.   In semiconductor manufacturing equipment, key components such as optical lenses and silicon wafers are extremely sensitive to dust. Even the smallest amount of dust particles can cause equipment failure or degrade product quality. High-efficiency filters effectively intercept airborne particulate matter, preventing it from entering the equipment, thus protecting its normal operation and product quality. In aseptic filling plants in the food and beverage industry, high-efficiency filters remove airborne microorganisms and dust, preventing contamination of food and beverage products, extending their shelf life, and safeguarding consumer health.

  From September 11th to 13th, 2025, KLC participated in RHVAC & CLEANFACT 2025 in Vietnam. As a leading brand in China's air purification and cleanroom solutions sector, KLC showcased its cutting-edge high-efficiency filters and innovative cleanroom technologies. With its superior product performance and professional solutions, KLC served as a vital bridge between the Vietnamese and Southeast Asian markets, further strengthening exchanges and cooperation within the cleanroom technology industry.     The Vietnam HVAC & Refrigeration & Cleanroom & High-Tech Factory Facilities Exhibition, which has undergone multiple iterations, has attracted participants from countries including Japan, South Korea, the European Union, Singapore, China, and India, including investors, general contractors, engineers, and representatives from manufacturing, cleanroom, and HVAC/Refrigeration industry associations. Notably, this exhibition was held concurrently with the Vietnam International Industrial Exhibition 2025 (VIET INDUSTRY 2025), which encompassed sectors such as machinery manufacturing, automation, pharmaceutical technology, and the construction industry. Together, they fostered a diverse exhibition ecosystem, strengthened industry collaboration and cooperation in modern infrastructure development, and provided exhibitors, sponsors, and partners with an excellent opportunity to explore business prospects and establish connections within the industry.      Technical Interaction and Exchange    At the booth, KLC's team of technical experts engaged in in-depth and fruitful exchanges with visitors and industry experts from Vietnam, surrounding regions, and around the world. Through product sample dissections, performance demonstrations, and case studies, the KLC team thoroughly addressed specific questions regarding product compatibility, energy-saving optimization, and maintenance cycles.      A Successful Ending: Fruitful Harvest, Looking Forward to the Future    The KLC booth remained bustling with visitors and a lively atmosphere throughout the multi-day exhibition. This RHVAC & CLEANFACT 2025 journey was not only a successful brand showcase and product promotion, but also a platform for profound market insights and industry exchange. KLC will continue to deepen its presence in the Southeast Asian market, continuously increasing R&D investment, launching products that better meet regional needs, and continuously improving its sales and service network. KLC is committed to becoming a "Clean Air Gold Partner" that supports industrial upgrading in Vietnam and Southeast Asia, working with customers to build a clean, healthy, and efficient industrial environment for the future.

In modern industrial and commercial environments, air quality management has become a critical consideration for business operations. Chemical air filters, as a key component of air purification technology, have been used across multiple industries for decades. They effectively remove odors, corrosive gases, and harmful or toxic gases from the air, protecting personnel health and optimizing the production environment.    The Development of Chemical Filtration Technology    Activated carbon, one of the primary materials used in chemical filtration technology, has been used as far back as 3750 BC. Egyptians first used charcoal to smelt ore to create bronze. By 1500 BC, activated carbon's uses had expanded to treating intestinal ailments, absorbing odors, and for papyrus writing. By 400 BC, ancient Indian and Phoenician civilizations had discovered activated carbon's antiseptic properties and used it for water purification.   Today, activated carbon is widely used in air filtration technology. For more detailed information on the classification and filtration mechanisms of chemical filters, please refer to "AMC Pollutant Control - Filter Media."   In addition to activated carbon, chemical filtration materials also include coconut shell activated carbon, ion exchange resins, and other adsorbent media, providing highly effective purification in diverse environments.      Wide Application of Chemical Filters    With the acceleration of industrialization, air pollution, particularly chemical pollution in the industrial sector, has become increasingly prominent. Unlike conventional cleanroom methods for controlling particulate and microbial contamination, the molecular size of chemical pollutants is often too small to be effectively captured by traditional particle filters. Therefore, chemical filtration technology has become essential for air pollution control, with applications across a wide range of industries.      Air Molecular Contamination Control (AMC)  In high-tech industries such as semiconductor, microelectronics, and photovoltaic manufacturing, even the slightest change in air quality can impact product yield. Consequently, these industries place extremely high demands on chemical filters, requiring the removal of acids, alkalinity, volatile organic compounds (VOCs), refractory compounds (RCs), oxidants, dopants, and ozone to ensure a stable production environment.