China Air Filter Manufacturer,Cleanroom Equipment Factory

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GUANGZHOU KLC CLEANTECH CO., LTD., as a leading supplier of air filters and cleanroom equipment, is committed to providing excellent solutions for clean and fresh air.

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YEARS OF EXPERIENCE

Hong Kong Kingland Investment Limited has been committed to advancing air purification technology and delivering exceptional products and services to customers worldwide since its inception. Leveraging Hong Kong's strategic position as an international financial and commercial center, we are able to efficiently integrate global resources, expand into international markets, and establish close partnerships around the world. Since 1994 when KLC was built, we have been dedicated to the research and development of air purification products. We have invested a large amount of funding and technology to ensure that our customers can enjoy the latest high-quality products and the most professional additional services. Since the 21st century, KLC has expanded its reach to every corner of the world, accumulating extensive experience and application knowledge in order to provide more comprehensive products and services. KLC was the first enterprise in the purifying field to pass the ISO14001 and ISO9001 certifications. We possess top-ranking clean workshops and production lines, as well as advanced air filter equipment. As one of the leading manufacturers in researching, designing, and producing products related to clean rooms, our products and production technologies have obtained dozens of national patents. Now, we have garnered support from many leading enterprises across various fields and countries. With our "Globalization thinking" business philosophy, KLC products are spreading throughout Asia, Europe, and America. No matter where you are, we are always by your side. In Mainland China, we have established an advanced production base that focuses on the research, development, production, and sales of air purification products. This production base is an integral part of our global layout, ensuring that we can continue to deliver high-quality products and services to customers worldwide. THE HISTORY OF KLC 2005﹎﹎﹎At the beginning of establishment, KLC committed to the construction projects in the area of air conditioning, refrigeration, ventilation, air treatment, dust-free workshop, etc, focusing on China's emerging markets for future high-tech manufacturing industry, which has provided a solid foundation for industrial clean room area in technology, management and services. 2006﹎﹎﹎KLC registered our own trademarks, transferred air purification manufacturing market from scattered hand-made workshop to factory integration production. In the same year, KLC became China's first batch company in the air purification field to pass the SGS ISO9001 and SGS ISO14001 certification, these criteria for quality and environment management have built a solid basic for KLC's management and development. KLC also won the "National Quality Credit Enterprise" in 2006. 2007﹎﹎﹎KLC sales channel developed into diversified stage, began foreign trade, undertook a large number of overseas orders, reached cooperation with numbers of well-known domestic and foreign enterprises. In the same year, KLC products quality reached to a higher level, highly praised by domestic and foreign partners, and won the " Enterprise of Good Creditworthiness " award. 2009﹎﹎﹎KLC' worked with more than 3,000 end-users, and established one of few 10,000 clean class clean room for HEPA filters and ULPA filter manufacturing, in order to ensure the filters are free from pollution before customer receive the products. The clean room has effectively meet the requirement for business and future expansion of capacity, logistics or hardware equipment. 2011﹎﹎﹎KLC again researched and developed our own a variety of purification products, the world-class quality, appearance and utility model patents has set off a clean air whirlwind among the industry. Opened up a new situation in the domestic air purification industry. 2013﹎﹎﹎KLC product technology break through the traditional constraints successfully, innovation and improvement has been promoted, some product projects have been reviewed and passed the state-level scientific and technological innovation projects. In the same year, KLC is awarded as "high-tech" enterprises. 2014﹎﹎﹎KLC imported a large-scale media folding machine and flat foaming machine, became the first in southern China producing 1500mm width mini-pleat media filter. 2016﹎﹎﹎KLC invested huge sums of money to introduce an U-level testing equipment for filter's air flow, resistance and efficiency testing, filling the blank in southern China market of air filter testing, secondary testing equipment with the Chinese Academy of Sciences. KLC all products start to label with a style code, which enable the immediate tracing from production, logistics and product maintenance. 2017﹎﹎﹎KLC brand get a further upgrade, integrated comprehensively both from internal and external, including APP, suppliers, supply chain, logistics system etc. Starting a new journey from the state-own company Da An Gene become a shareholder of KLC. 2020﹎﹎﹎Introducing fully automatic MPPS filtration efficiency scanning equipment and air flow resistance detection equipment imported from the United States to enhance KLC's product development capabilities and meet higher customer demands.. 2022﹎﹎﹎KLC was awarded the title of "Specialized, Refined, Unique and New" enterprise and innovative small and medium-sized enterprise. In the same year, KLC's R&D center was approved as the Guangdong Engineering R&D Center. 2024﹎﹎﹎Introducing fully automatic MPPS filtration efficiency scanning equipment and air flow resistance detection equipment imported from the United States to enhance KLC's product development capabilities and meet higher customer demands.

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Automatic Sealant Glue Inject Machine Interactive laser cutting machine Automatic Digital Punching Machine Automatic Digital Bending Machine Automatic Folding Machine Combination Folding Machine Hepa Media Pleating Machine Semi-Automatic Sealant Glue Inject Machine2 Separator Filter Aluminum Foil Presing Machine Efficiency, Air Flow, Resistance Testing Machine PAO Testing Equipment PAO Testing Equipment2 Smoke Leakage Test Air Duct Type Particle Counter Testing Efficiency, Air Flow, Resistance Testing Machine 2 Semi-Automatic Sealant Glue Inject Machine

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6S management; ISO9001 quality management system; ISO14001 environmental management system

Our Team

Senior & professional sales service team and Professional production team

Senior & professional sales service team
More than 10 years experience in filter and clean room equipment sales
Senior design and development team
More than 10 years of experience
Professional production team
6S management

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About Us

GUANGZHOU KLC CLEANTECH CO., LTD., as a leading supplier of air filters and cleanroom equipment, is committed to providing excellent solutions for clean and fresh air.

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KLC provides long-term security and technical support, based on data and facts, comprehensive and in-depth analysis, to provide you with professional advice and detailed product descriptions.

May 28, 2026
KLC Pocket Filter F7 F8 F9: Performance Data, Pressure Drop Curves, and HVAC Application Guide
Pocket filters (also known as bag filters) are the workhorses of medium-efficiency HVAC filtration. Available in F7, F8, and F9 grades (ISO 16890 ePM1 to ePM2.5), these filters provide high dust-holding capacity and low initial resistance, making them ideal as secondary filters for AHUs and cleanroom pre-filtration. At KLC International, our pocket filters are engineered using high-strength synthetic fiber or fiberglass media to ensure structural integrity even under high airflow conditions. Technical Performance Data (Standard 592x592mm) Parameter F7 (ePM1 50-65%) F8 (ePM1 70-85%) F9 (ePM1 >80%) Initial Resistance 60 – 80 Pa 80 – 110 Pa 110 – 150 Pa Final Resistance (Rec.) 250 Pa 300 Pa 450 Pa Number of Pockets 6 – 8 6 – 10 8 – 12 Typical Airflow 3400 m³/h 3400 m³/h 3400 m³/h Pocket Depth 380mm – 600mm 380mm – 600mm 500mm – 600mm Understanding the Pressure Drop Curve The performance of a pocket filter is defined by its Pressure Drop vs. Dust Loading curve. Initial Phase: The filter has very low resistance, allowing for maximum energy efficiency. Dust Loading: As the pockets capture particles, the "V-shape" design allows for a massive surface area, meaning the pressure rises much slower than with flat panel filters. Replacement Point: When the pressure drop reaches the recommended final resistance (e.g., 250 Pa for F7), the filter must be replaced to prevent fan strain and bypass. Why KLC Pocket Filters? 1. Sonic Welded Edges: Our synthetic pockets are ultrasonically welded to eliminate needle holes and prevent air bypass. 2. Internal Spacers: We use internal stay-bars to ensure each pocket opens fully, maximizing the effective filtration area. 3. Rigid Header Frame: Available in galvanized steel, plastic, or aluminum (20mm or 25mm) for easy installation in any AHU brand. FAQ: Frequently Asked Questions 1. What is the difference between F7, F8, and F9 filters?The difference is efficiency. F7 captures approx. 50-65% of PM1 particles; F8 captures 70-85%; F9 captures >80%. F9 provides the highest air purity but with higher resistance. 2. How often should pocket filters be replaced?Typically every 3-6 months. However, it is best to monitor the pressure drop; replace them once they reach their rated final resistance. 3. What is a synthetic fiber pocket filter?It is a filter made of layered synthetic media that is break-resistant and moisture-resistant, unlike traditional fiberglass. 4. Can I wash and reuse a pocket filter?No. Pocket filters are disposable. Washing them will damage the fine fiber structure and destroy the filtration efficiency. 5. Why are there different numbers of pockets?More pockets provide more surface area, which leads to lower initial resistance and a longer lifespan, but increases the purchase cost. 6. Do I need a pre-filter before the pocket filter?Yes. Using a G3 or G4 panel filter as a pre-filter will protect the pocket filter from large dust, extending its life significantly. 7. Are KLC pocket filters ISO 16890 compliant?Yes. All our HVAC filters are tested against ISO 16890 and EN 779:2012 standards. 8. What is the "V-shape" design for?The V-shape ensures even airflow throughout the depth of the pocket, preventing the "clapping" of pockets and ensuring full utilization of the media. Maximize your AHU performance.View KLC Pocket Filter Specifications or Request a Pressure Drop Chart.

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May 26, 2026
FFU Buying Guide: EC vs AC Motor, Noise, Energy, Filter Life — 8 Dimensions You Must Compare
The Fan Filter Unit (FFU) is the heart of a modular cleanroom. When choosing an FFU, the most critical decision is between an AC motor and an EC (Electronically Commutated) motor. While AC is cheaper upfront, EC motors offer up to 50% energy savings and superior control for large-scale installations. At KLC International, we manufacture both, but we see a clear industry shift toward EC technology. Here is how to compare the two. EC vs. AC FFU: The Ultimate Comparison Table Feature AC Motor FFU EC Motor FFU Power Consumption 150W – 250W (Baseline) 80W – 150W (30-50% Saving) Noise Level 52 – 68 dB(A) 45 – 58 dB(A) Speed Control 3-Step or Transformer 0-10V / RS485 (Continuous) Heat Dissipation High (More HVAC load) Low (Less HVAC load) Lifespan 3 – 5 years 8 – 12 years Group Control Difficult / Limited Native (Up to 255 units/loop) Initial Cost Baseline +20% to +35% Maintenance Higher (Brushes/Heat wear) Very Low (Brushless) 8 Dimensions of Comparison 1. What is a fan filter unit (FFU)?An FFU is a self-powered air purification device consisting of a fan, a motor, and a HEPA filter, designed to be mounted in a cleanroom ceiling grid. 2. What is the difference between EC and AC motor FFU?EC motors are brushless DC motors that use electronics to control speed efficiently. AC motors are traditional induction motors that are less efficient and harder to control. 3. How many FFUs do I need for my cleanroom?It depends on the ISO class. For ISO 7, you typically need 15-25% ceiling coverage. Use the ACH formula to calculate the exact number. 4. What HEPA filter class should an FFU use?H14 is the standard for most cleanrooms. U15 or U16 ULPA filters are used for semiconductor fabs. 5. How loud is a fan filter unit?A high-quality FFU (like KLC's) should operate at 52-56 dB(A) at 0.45 m/s. EC units are generally 3-5 dB quieter. 6. Can FFUs be controlled centrally?Yes. EC motors support RS485 communication, allowing a central touch screen or PC to monitor and control hundreds of units simultaneously. 7. How long do fan filter unit motors last?AC motors last 30,000-50,000 hours. EC motors can exceed 80,000-100,000 hours of continuous operation. 8. How do I calculate FFU coverage for an ISO 7 cleanroom?Start with the room volume, multiply by the target ACH (e.g., 60), and divide by the CFM rating of the FFU (e.g., 650 CFM for a 2x4 unit). How to Choose? Choose AC for small, budget-constrained clean booths (1-5 units) where complex control is not needed. Choose EC for ISO 5/6 cleanrooms, large facilities, or any project where energy costs and noise levels are high priorities. FAQ: Frequently Asked Questions 1. What is a fan filter unit (FFU)?An FFU is a self-powered air purification device consisting of a fan, a motor, and a HEPA filter, designed to be mounted in a cleanroom ceiling grid. 2. What is the difference between EC and AC motor FFU?EC motors are brushless DC motors that use electronics to control speed efficiently. AC motors are traditional induction motors that are less efficient and harder to control. 3. How many FFUs do I need for my cleanroom?It depends on the ISO class. For ISO 7, you typically need 15-25% ceiling coverage. Use the ACH formula to calculate the exact number. 4. What HEPA filter class should an FFU use?H14 is the standard for most cleanrooms. U15 or U16 ULPA filters are used for semiconductor fabs. 5. How loud is a fan filter unit?A high-quality FFU (like KLC's) should operate at 52-56 dB(A) at 0.45 m/s. EC units are generally 3-5 dB quieter. 6. Can FFUs be controlled centrally?Yes. EC motors support RS485 communication, allowing a central touch screen or PC to monitor and control hundreds of units simultaneously. 7. How long do fan filter unit motors last?AC motors last 30,000-50,000 hours. EC motors can exceed 80,000-100,000 hours of continuous operation. 8. How do I calculate FFU coverage for an ISO 7 cleanroom?Start with the room volume, multiply by the target ACH (e.g., 60), and divide by the CFM rating of the FFU (e.g., 650 CFM for a 2x4 unit). 9. Can I mix AC and EC FFUs in the same cleanroom?Possible, but not recommended, as they require different control systems and have different airflow characteristics. 10. Who manufactures FFUs in China?KLC International is a top-tier manufacturer with specialized production lines for both high-efficiency AC and EC FFUs. Maximize your cleanroom’s efficiency.View KLC’s FFU Product Range or Get a Quote for EC FFUs.

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May 21, 2026
ISO Cleanroom Classification Explained: Particle Count, Air Changes, and Real-World Applications
The ISO 14644-1 standard classifies cleanrooms based on the number of particles per cubic meter of air. Ranging from ISO 1 (the cleanest) to ISO 9, this classification dictates everything from HEPA filter selection to the number of air changes per hour (ACH) required for compliance. Understanding your target ISO class is the first step in cleanroom design. Whether you are building a pharmaceutical suite or a semiconductor fab, these numbers are your non-negotiable benchmarks. ISO 14644-1 Particle Count Standard The following table outlines the maximum permitted particle concentrations for each class. ISO Class Particles ≥0.1μm Particles ≥0.5μm Particles ≥5.0μm Equivalent US FED 209E ISO 5 102,000 3,520 29 Class 100 ISO 6 1,020,000 35,200 293 Class 1,000 ISO 7 — 352,000 2,930 Class 10,000 ISO 8 — 3,520,000 29,300 Class 100,000 Recommended Air Changes Per Hour (ACH) To maintain these particle levels, air must be refreshed constantly. Here are the industry-standard ACH ranges: ISO Class Air Changes Per Hour (ACH) Primary Filter Coverage ISO 5 240 – 480 35% – 70% ISO 6 150 – 240 25% – 35% ISO 7 60 – 150 15% – 25% ISO 8 20 – 60 5% – 15% Typical Industry Applications ISO 5: Sterile pharmaceutical filling, semiconductor wafer fabrication, high-precision optics. ISO 6: Medical device assembly, pharmaceutical preparation, aerospace components. ISO 7: General laboratory work, pharmaceutical secondary packaging, high-end electronics. ISO 8: Food processing packaging, plastic injection molding for medical use, bulk chemical production. Operational States: As-Built, At-Rest, vs. Operational It is vital to specify when the classification applies: As-Built: Empty room, no equipment, no people. At-Rest: Equipment installed and running, but no personnel. Operational: Full production with personnel present. (The hardest to pass). FAQ: Frequently Asked Questions 1. What is the most common cleanroom class?ISO 7 and ISO 8 are the most common for general industrial and pharmaceutical secondary operations. 2. Can an ISO 8 room be upgraded to ISO 7?Yes, usually by increasing the number of FFUs and the Air Changes per Hour (ACH), provided the HVAC system can handle the load. 3. What is the difference between ISO 5 and Class 100?They are equivalent. Class 100 is the old US Federal Standard 209E, which measured 100 particles per cubic foot. ISO 5 is the modern metric equivalent. 4. How often should a cleanroom be re-certified?High-risk rooms (ISO 5 and cleaner) should be certified every 6 months. ISO 6-9 rooms typically require annual re-certification. 5. Does every cleanroom need an air shower?For ISO 6 and cleaner, an air shower is highly recommended to prevent personnel from carrying surface contaminants into the room. 6. How do I measure particle counts?Use a calibrated laser particle counter. Sampling points and volumes must follow the statistical formula provided in ISO 14644-1. 7. Is a fume hood a cleanroom?No. A fume hood provides local protection but does not control the environment of the entire room. 8. What happens if my cleanroom fails the particle count test?Check for HEPA filter leaks, ensure ACH is meeting the design spec, and verify that personnel are following proper gowning procedures. Plan your cleanroom with precision.Download KLC’s Cleanroom Design Guide or Talk to a KLC Consultant.

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May 19, 2026
KLC Laminar Flow Ceiling for Operating Rooms: ISO 5 Zone Design and Installation Guide
A laminar flow ceiling is a specialized air distribution system that creates a vertical, unidirectional flow of HEPA-filtered air over the surgical site. By maintaining an ISO 5 environment and positive pressure, it effectively prevents airborne contaminants from entering the surgical wound, ensuring patient safety and GMP/HTM compliance. In modern hospital design, the laminar flow ceiling (also known as a surgical canopy) is the gold standard for ultra-clean operating theaters. KLC’s systems are engineered to meet the stringent requirements of DIN 1946-4 and ISO 14644-1. Technical Specifications and Design Standards Parameter KLC Standard Compliance Standard Cleanliness Class ISO 5 (Class 100) ISO 14644-1 Air Velocity 0.25 m/s – 0.45 m/s DIN 1946 / HTM 03-01 HEPA Efficiency 99.995% @ 0.3μm (H14) EN 1822 Frame Material Powder-coated Steel / SUS 304 Hospital Grade Lighting Integrated LED (Shadowless compatible) Standard Core Design Principles 1. Coverage Area Calculation: The laminar flow zone must extend at least 0.5 meters beyond the surgical table on all sides. A typical KLC ceiling for an orthopedic suite measures 2.4m x 2.4m or 3.0m x 3.0m. 2. Unidirectional Flow: Unlike standard diffusers that mix air, our ceilings use a specialized "equalizing film" to ensure air moves in a single, non-turbulent column, pushing particles down and out toward floor-level exhausts. 3. Gel-Seal Technology: To ensure 0% bypass leakage, KLC ceilings utilize a fluid-seal (gel) trough, which is superior to traditional mechanical gaskets in sterile hospital environments. Installation & Validation Checklist Duct Connection: Ensure the plenum is hard-ducted to the AHU with appropriate balancing dampers. Leak Testing: Perform a PAO/DOP scan test on all H14 filters post-installation. Velocity Mapping: Measure air speed at 15-20 points across the surface to ensure uniformity within ±20%. FAQ: Frequently Asked Questions 1. What is a laminar flow ceiling in an operating room?It is a ceiling-mounted filtration unit that provides a constant stream of sterile air directly over the patient and surgical team to prevent infection. 2. What ISO class is required for an operating room?While the entire room may be ISO 7, the area directly under the laminar flow ceiling must maintain ISO 5 (Class 100) conditions during surgery. 3. How large should a laminar flow canopy be for a surgical table?The size depends on the surgery type. Standard sizes range from 1.4m x 2.4m for general surgery to 3.2m x 3.2m for complex orthopedic or cardiac procedures. 4. What air velocity is required for OR laminar flow?International standards typically require a velocity between 0.2 m/s and 0.45 m/s at the supply face to maintain a stable "piston" of air. 5. How is a laminar flow ceiling different from a fan filter unit (FFU)?An FFU has its own motor; a laminar flow ceiling is usually a passive plenum supplied by a central Air Handling Unit (AHU), though KLC offers powered versions. 6. Does a laminar flow ceiling need HEPA or ULPA filters?Standard hospital ORs use H14 HEPA filters. ULPA filters are generally reserved for ultra-sensitive microelectronics or specialized research. 7. How often should operating room HEPA filters be replaced?Typically every 2-3 years in a hospital setting, or whenever the pressure drop exceeds the manufacturer's limit (usually 2x the initial resistance). 8. Who manufactures laminar flow ceilings for hospitals?KLC International is a leading manufacturer specializing in hospital-grade filtration and laminar flow systems for the global market. Upgrade your surgical safety standards.Explore KLC Laminar Flow Ceiling Models or Consult with our medical engineers.

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