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 https://www.klcintl.com/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 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 https://www.klcintl.com/semiconductor manufacturing and https://www.klcintl.com/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 https://www.klcintl.com/semiconductor manufacturing, https://www.klcintl.com/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 https://www.klcintl.com/semiconductor manufacturing, https://www.klcintl.com/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 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 https://www.klcintl.com/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 https://www.klcintl.com/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 https://www.klcintl.com/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.

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!

Air filters are a type of air filter characterized by high filtration precision, high resistance, and high cost. They are essential consumables for industrial cleanrooms. Recent advances in air filtration technology, including the research and development of filter media, filtration mechanisms, and the development and application of filtration equipment, have significantly boosted the development of air filters!

 Industrial Cleanrooms 

Industrial cleanrooms require continuous and effective removal of even smaller particles. HEPA filters were once used for end-of-line filtration, while ULPA filters are now the highest-precision ultrafiltration filters. They generally utilize fine glass fiber filter media, but membranes and electrostatically enhanced media have also made inroads into this field, seeing some experimental application and achieving significant progress. The most stringent requirements for exhaust gases emitted by production plants are toxic gases. Filters used in industrial cleanrooms will continue to evolve in line with modern technology, aiming for higher precision, lower filtration resistance, and more effective performance.

 Pharmaceutical Factory Sterile Workshops 

The production environment in pharmaceutical factory sterile workshops must strictly control microbial and particulate contamination. Industrial air filters employ a three-stage filtration system: a primary filter (G4) intercepts large dust and hair particles, a medium-efficiency filter (F8) further filters particles larger than 1 micron, and a high-efficiency filter (H13) effectively intercepts particles 0.3 microns. In addition, some workshops are equipped with chemical filters at the end, filled with activated carbon or chemical adsorbents, to remove residual harmful gases and odors from the air and prevent pharmaceutical contamination. To ensure sterility, the filter frames are often made of antimicrobial materials. After installation, they must undergo integrity testing (such as PAO testing) to ensure the sealing and effectiveness of the entire filtration system.

 Food Processing Workshops 

Food processing workshops must prevent dust and microbial contamination while also controlling odors from the production process (such as cooking fumes in bakery rooms and odors in fermentation rooms). Industrial air filters employ food-grade filter media, such as antimicrobial-treated polyester fiber filters, to prevent secondary contamination of food. In addition, activated carbon filters are widely used in odor treatment, quickly removing odor molecules through the physical adsorption of high iodine value activated carbon.

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.

In the cleanroom, the heart of a food factory, every breath of air and every surface plays a crucial role in the safety and quality of the final product. How can materials, tools, and semi-finished products flow safely, efficiently, and contamination-free between clean and non-clean areas? This requires a quietly unsung yet crucial "invisible guardian"—the professional clean passbox!

 01  Isolating Contamination, Protecting Purity 

Double-Door Interlock: Ensures both doors cannot be opened simultaneously, effectively blocking external contaminants such as dust and microorganisms from entering the cleanroom with the airflow.

High-Efficiency Filtration: A built-in High-Efficiency Particulate Air (HEPA) filter continuously purifies the air during the transfer process, maintaining a positive pressure environment and preventing cross-contamination.

Smooth and Easy-Clean: Made of food-grade materials such as 304/316L stainless steel, the surface is smooth, with no dead spots or risk of debris, making it easy to thoroughly clean and disinfect.

 02  Improve Efficiency and Optimize Processes 

Convenient Operation: The ergonomic design and smooth opening and closing significantly shorten material transfer time, reduce the frequency of personnel entering and exiting the cleanroom, and minimize contamination risks. Standardized Management: Clear transfer processes (such as UV disinfection and wiping procedures) ensure that each transfer complies with standard operating procedures (SOPs).

 03  Compliance Assurance for Audit Preparedness 

Regulatory Compliance: Strict adherence to cleanroom logistics channel requirements of food industry standards such as GMP, HACCP, and ISO 22000 is essential for preparing for various certification audits.

Traceability: Comprehensive transfer records (optional electronic record functionality) provide a basis for quality traceability.

Standard Color Coding for Webbing Slings According to EN 1492

Webbing slings are widely used in lifting operations across construction, logistics, and industrial sectors. To ensure safety and efficiency, webbing slings are color-coded according to the EN 1492 standard, which specifies the working load limits (WLL) for different sling capacities. Understanding this color coding allows operators to select the correct sling for each lifting task.

Importance of Color Coding

Color coding provides several key benefits:

Safety: Enables quick identification of the working load limit, reducing the risk of overloading.

Efficiency: Simplifies selection and inspection of slings, saving time during operations.

Compliance: Ensures lifting equipment meets international safety requirements as specified by EN 1492.

At NANJING D.L.T SLING CO., LTD, our webbing slings are manufactured in strict accordance with EN 1492 and feature durable, standardized color coding to support safe and reliable lifting.

EN 1492 Webbing Sling Color Codes

The EN 1492 standard defines color codes for polyester and polyamide webbing slings according to their working load limits. The commonly used color codes are:

Best Practices for Using Color-Coded Webbing Slings

Follow EN 1492 Standards: Ensure all webbing slings comply with EN 1492.

Inspect Slings Regularly: Check for signs of wear, fraying, or damage before each use.

Select Appropriate Sling: Choose a sling with a suitable WLL according to the color code.

Provide Training: Operators should be trained in proper handling and color-code identification to maintain safety.

Standard color coding of webbing slings under EN 1492 provides a clear and reliable method to ensure safe lifting operations. Correct identification of sling capacity promotes safety, operational efficiency, and compliance with international standards.

NANJING D.L.T SLING CO., LTD offers high-quality EN 1492-compliant webbing slings with durable and accurate color coding. Our products are engineered for safety, reliability, and performance in demanding industrial environments.

 Contact us to learn more about our webbing slings or to request a sample.

Flat webbing slings are one of the most widely used lifting tools across industries such as construction, mining, logistics, shipping, and manufacturing. They are lightweight, flexible, easy to handle, and capable of lifting heavy loads safely. However, the reliability of a webbing sling depends on how it is designed, manufactured, and used.  

In Australia, flat webbing slings must comply with the **Australian Standard AS 1353**, which sets clear rules for product quality and safe operation. At **NANJING D.L.T SLING CO., LTD**, we manufacture lifting products that meet or exceed international standards, including AS 1353, ensuring that our customers can work with confidence in demanding environments.

The **Australian Standard AS 1353** is specifically written for flat synthetic webbing slings made of man-made fibers, such as polyester. It provides guidance for both manufacturers and users to guarantee safe lifting practices.  

This standard is divided into two main parts:  

- **AS 1353.1 – Product requirements**  
  Covers the technical specifications for materials, construction, performance, testing, and labeling.  

- **AS 1353.2 – Safe use**  
  Provides guidelines for users, including inspection procedures, rejection criteria, and safe lifting practices.  

Together, these two parts ensure that the slings are not only manufactured correctly but also used safely throughout their service life.

## Key Requirements for Flat Webbing Slings under AS 1353  

1. **Material**  
   - Slings must be made from high-strength synthetic fibers such as polyester.  
   - The material should be resistant to abrasion, moisture, UV rays, and many common chemicals.  

2. **Safety Factor**  
   - All slings must have a **minimum safety factor o**

3. **Color Coding System**  
   - A standardized color system is used for easy identification of WLL:  
     - Purple – 1 tonne  
     - Green – 2 tonnes  
     - Yellow – 3 tonnes  
     - Grey – 4 tonnes  
     - Red – 5 tonnes  
     - Brown – 6 tonnes  
     - Blue – 8 tonnes  
     - Orange – 10 tonnes  

   This system helps workers quickly identify the right sling for each lifting task.  

4. **Labeling**  
   - Every sling must have a durable label that includes:  
     - Working Load Limit (WLL)  
     - Manufacturer’s name or trademark  
     - Material type  
     - Standard compliance (AS 1353)  
     - Safety instructions  

   If the label is missing or unreadable, the sling must not be used.  

5. **Testing & Inspection**  
   - Each sling must undergo proof load testing during production.  
   - Users are required to carry out regular inspections before each lift.  
   - Damaged or defective slings should be removed from service immediately.

## Why AS 1353 Compliance Matters  

Lifting operations always involve risk, and non-compliant equipment can cause accidents, injuries, or costly downtime. By using slings that comply with **AS 1353**, businesses can:  

- **Guarantee safety** for workers and equipment.  
- **Improve efficiency** by using properly rated slings for each job.  
- **Extend service life** through high-quality construction and correct use.  
- **Build trust** with clients and partners by showing commitment to safety standards.  

For industries such as construction and mining, where heavy lifting is a daily task, compliance with AS 1353 is not just a legal requirement but also a critical safety measure.

Our Commitment to Quality  

At **NANJING D.L.T SLING CO., LTD**, we specialize in the production of a wide range of lifting and securing products, including:  

- Flat webbing slings  
- Endless round slings  
- High-performance fiber slings  
- Ratchet straps and tie-downs  
- Cargo nets and lifting nets  

With advanced weaving and stitching machines, strict quality control, and professional testing facilities, we ensure that every sling leaving our factory meets the required international standards.  

We also provide **CE and GS certified products** and can customize labeling with your company logo. Our current product range includes slings with a maximum lifting capacity of **up to 1100 tonnes**, covering both standard and special requirements.

Selecting the right teeth knife is essential for achieving clean, efficient, and cost-effective cutting results in industrial applications. Whether you're working in the packaging, food processing, plastic, or rubber industry, using a knife tailored to your specific cutting task can significantly improve productivity and product quality.

The first factor to consider is material compatibility. Different materials require different types of teeth knives. For example, soft materials like plastic films or paper benefit from fine-toothed blades, while tougher materials like rubber or composite layers may need coarse, reinforced teeth for aggressive cutting action.

Another critical aspect is tooth design. The shape, size, and spacing of the teeth determine the cutting efficiency and edge finish. Straight teeth offer consistent slicing, whereas serrated or scalloped designs are better suited for gripping and tearing through fibrous or layered materials.

Blade material also plays a key role. High-speed steel (HSS), tungsten carbide, and stainless steel are popular choices, each offering different levels of hardness, wear resistance, and corrosion protection. Coatings such as TiN (Titanium Nitride) can further enhance blade longevity in high-friction environments.

Finally, consider whether the lcknife blade is re-sharpenable or disposable. Reusable knives offer long-term value and sustainability, while disposable types are suitable for environments requiring strict hygiene or fast blade changes.