Applications
It widely used to hospital operation room, laboratory, pharmaceutical room, electronics, optical fiber equipment and food processing factory etc.
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.

28+

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.
Production
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    
Certificate
6S management; ISO9001 quality management system; ISO14001 environmental management system
  • CE-AS Series
  • CE-LF Series
  • Air shower-CE
  • CE-Clean bench
  • CE-Pass box
  • FFU-CE
  • ISO9001 (EN)
  • ISO14001 2015
  • Pleated Filter-UL-Certificate of Compliance
  • Pocket Filter-UL-Certificate of Compliance
  • Separator Filter-UL-Certificate of Compliance
  • SGS AIR Shower test report
  • SGS FFU & LC VC
  • 2009 UL-filter
  • SGS F5 F7 F9 filter roll stitched RoHS
  • Certificate ffu ul
Our Team
Senior & professional sales service team and Professional production team
  • Senior & professional sales service team
    Senior & professional sales service team

    More than 10 years experience in filter and clean room equipment sales

  • Senior design and development team
    Senior design and development team

    More than 10 years of experience

  • Professional production team
    Professional production team

    6S management

  • 1994
    0
    Since
  • 2000
    0+
    Sales
  • 500
    0+
    Solutions
  • 100+
    0
    Countries
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.
Featured Products
The products involve 58 fields and have a certain market share.
  • Air Filter
  • Cleanroom Equipment
Certificate
6S management; ISO9001 quality management system; ISO14001 environmental management system
  • CE-AS Series

    CE-AS Series

  • CE-LF Series

    CE-LF Series

  • Air shower-CE

    Air shower-CE

  • CE-Clean bench

    CE-Clean bench

  • CE-Pass box

    CE-Pass box

  • FFU-CE

    FFU-CE

  • ISO9001 (EN)

    ISO9001 (EN)

  • ISO14001 2015

    ISO14001 2015

  • Pleated Filter-UL-Certificate of Compliance

    Pleated Filter-UL-Certificate of Compliance

  • Pocket Filter-UL-Certificate of Compliance

    Pocket Filter-UL-Certificate of Compliance

  • Separator Filter-UL-Certificate of Compliance

    Separator Filter-UL-Certificate of Compliance

  • SGS AIR Shower test report

    SGS AIR Shower test report

  • SGS FFU & LC VC

    SGS FFU & LC VC

  • 2009 UL-filter

    2009 UL-filter

  • SGS F5 F7 F9 filter roll stitched RoHS

    SGS F5 F7 F9 filter roll stitched RoHS

  • Certificate ffu ul

    Certificate ffu ul

Latest News
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.
  • Negative Pressure in Labs: How HEPA Filter Boxes Create Invisible Contamination Barriers
    May 12, 2026
    Negative Pressure in Labs: How HEPA Filter Boxes Create Invisible Contamination Barriers
    Negative pressure rooms prevent the escape of airborne pathogens by maintaining lower air pressure than surrounding areas. The Terminal HEPA Filter Box is the critical engine of this system, filtering exhaust air to ensure no contaminants exit the controlled environment.   In high-risk environments like BSL-3 laboratories, ICU isolation wards, and TB treatment rooms, contamination control is a matter of life and death. The most effective defense is a negative pressure environment supported by high-efficiency filtration.     How Negative Pressure Works The principle is simple: air naturally flows from areas of high pressure to areas of low pressure. By continuously exhausting more air than is supplied, the room maintains a "negative" state. If a door is opened, air rushes into the room, preventing contaminated particles from floating out into corridors.     The Role of HEPA Filter Boxes While the pressure prevents air leakage, the HEPA Filter Box (Terminal Filter Module) ensures that the air being exhausted or supplied is purified. Supply Side: HEPA boxes filter incoming air to ensure the lab remains sterile. Exhaust Side: In negative pressure setups, HEPA boxes are often placed in the exhaust ceiling or wall. They capture 99.99% of bacteria and viruses before the air reaches the external ducting. Seal Integrity: KLC’s HEPA boxes utilize gel-seal technology to ensure a 100% airtight connection, which is vital for maintaining pressure differentials.   Pressure Differential Standards   Facility Type Required Pressure (vs. Corridor) Recommended HEPA Grade General ICU Isolation -2.5 Pa to -5 Pa H13 / H14 TB Isolation Room -10 Pa to -15 Pa H14 BSL-3 Laboratory -30 Pa to -50 Pa H14 (Double HEPA) Pharmacy Compounding -12.5 Pa (Buffer room) H14   Case Study: BSL-3 Laboratory Implementation In a recent BSL-3 project, KLC supplied Terminal HEPA Modules with integrated pressure sensors. Challenge: The lab required a constant -40 Pa differential. Solution: KLC’s gel-seal HEPA boxes were installed in a redundant exhaust configuration. Result: The system passed DOP (Dispersed Oil Particulate) leak testing on the first attempt, ensuring  total containment of airborne viral agents.     FAQ: Frequently Asked Questions 1. What is negative pressure in a hospital room? It is a ventilation technique where the air pressure inside the room is lower than outside, ensuring that air flows into the room but never out, protecting people outside from airborne infections.   2. What pressure difference is needed for a negative pressure isolation room? According to CDC and WHO standards, a minimum of -2.5 Pa (0.01" water gauge) is required, though many facilities aim for -5 Pa to -10 Pa for added safety.   3. How does a HEPA filter box maintain negative pressure? The box itself doesn't create pressure, but its airtight housing and low-resistance filters allow the HVAC exhaust fan to pull air through efficiently without leaks that would compromise the vacuum.   4. What is the difference between negative pressure and positive pressure cleanroom? Negative pressure protects the outside from the room (used for biohazards). Positive pressure protects the inside from the outside (used for electronics or pharma manufacturing).   5. Can HEPA filters be used in negative pressure exhaust systems? Yes, they are mandatory. Without HEPA filtration, a negative pressure room would simply pump pathogens directly into the environment or the building's ductwork.   6. How often should HEPA filters in negative pressure rooms be tested? Integrity testing (DOP/PAO test) should be performed at least every 6-12 months or whenever a filter is replaced.   7. What is a terminal HEPA module? It is a housing unit installed at the end of a duct (at the ceiling or wall interface) that holds the HEPA filter and often includes a diffuser to distribute air evenly.   8. Who installs HEPA filter boxes for hospital negative pressure rooms? Specialized HVAC contractors or cleanroom engineering firms typically handle installation, but the equipment should be sourced from a certified manufacturer like KLC.     Designing a safe containment facility? View KLC's Terminal HEPA Filter Box Solutions or Request a technical drawing.  
  • KLC Class II Biosafety Cabinet: A2 vs B2 — Which One Does Your Lab Actually Need?
    May 08, 2026
    KLC Class II Biosafety Cabinet: A2 vs B2 — Which One Does Your Lab Actually Need?
    A Class II A2 biosafety cabinet recirculates 70% of air and exhausts 30%, making it ideal for microbiological work without volatile chemicals. In contrast, a Class II B2 cabinet exhausts 100% of its air, providing total protection when working with toxic chemicals or radionuclides.     Choosing the right biosafety cabinet (BSC) is critical for laboratory safety and compliance. This guide breaks down the technical differences between the two most common types: Class II Type A2 and Type B2.   Technical Comparison: A2 vs. B2 Structure   Feature Class II Type A2 Class II Type B2 Air Recirculation 70% Recirculated / 30% Exhausted 0% Recirculated (100% Exhausted) Exhaust Requirement Can exhaust to room or via canopy Must be hard-ducted to external blower Chemical Protection Trace amounts only (if ducted) Excellent (volatile chemicals/radionuclides) Safety Fail-safe Internal blower maintains airflow Cabinet shuts down if external fan fails Energy Consumption Lower (Internal blower only) Higher (Requires powerful external exhaust) Installation Cost Minimal High (Ductwork + External Blower)   Key Differences in Protection Airflow Mechanism: In an A2 cabinet, air is filtered by HEPA filters and recirculated within the work zone. This is sufficient for BSL-1, BSL-2, and BSL-3 pathogens. Total Exhaust (B2): The B2 cabinet draws all its air from the room and exhausts it entirely through a dedicated duct. This prevents any chemical vapors from building up or being recirculated onto the sample. Fail-Safe Operation: KLC's B2 cabinets are designed with an interlock system. If the external exhaust fan fails, the internal blower shuts down immediately to prevent positive pressure from pushing contaminated air into the lab.   Decision Tree: Which One Should You Choose? Step 1: Are you working with volatile toxic chemicals or radionuclides? Yes → You MUST use a Class II Type B2. No → Go to Step 2.   Step 2: Does your facility have existing external exhaust ducting? Yes → You can use Type A2 (with canopy) or Type B2. No → Use Type A2 (recirculating to the room).   Step 3: Is energy efficiency a priority? Yes → Type A2 is the superior choice.     Why Choose KLC Biosafety Cabinets? KLC International provides high-performance Class II cabinets certified for global standards. Our cabinets feature: H14 HEPA Filters: 99.995% efficiency for particles down to 0.3μm.   Real-time Airflow Monitoring: Precise sensors for inflow and downflow velocities.   Ergonomic Design: 10° slanted front for operator comfort during long hours.     FAQ: Frequently Asked Questions 1. What is the difference between Class II A2 and B2 biosafety cabinet?The main difference is the exhaust. A2 recirculates 70% of air, while B2 exhausts 100%. B2 is required for volatile chemicals, while A2 is for standard biological work.   2. Can I use a Class II A2 cabinet for working with volatile chemicals?Only if it is "thimble-connected" (canopy) to an external exhaust, and only for trace amounts. For significant chemical work, a B2 is mandatory.   3. Does a B2 biosafety cabinet require external exhaust?Yes. A B2 cabinet cannot function without a dedicated external exhaust system and a hard duct connection.   4. What BSL level does a Class II biosafety cabinet protect against?Class II cabinets (both A2 and B2) are designed for work in Biosafety Level 1, 2, and 3 laboratories.   5. How often should biosafety cabinet HEPA filters be replaced?Typically every 3-5 years, depending on usage and environment. KLC cabinets include a filter life indicator to alert users.   6. What certifications should a biosafety cabinet have?Look for NSF/ANSI 49 (USA), EN 12469 (Europe), or equivalent national standards to ensure safety compliance.   7. Is a biosafety cabinet the same as a fume hood?No. A fume hood protects the operator from chemicals but does not protect the product from contamination. A BSC protects the operator, the product, and the environment.   8. How do I validate a biosafety cabinet after installation?You should perform field certification, including HEPA filter leak tests, airflow velocity testing, and smoke pattern visualization by a qualified technician.   Ready to upgrade your lab safety?Explore the KLC Class II Biosafety Cabinet Series or Contact our engineers for a custom layout
  • How to Scientifically Choose a High-Efficiency Air Filter? KLC Helps You Master These 5 Dimensions!
    May 06, 2026
    How to Scientifically Choose a High-Efficiency Air Filter? KLC Helps You Master These 5 Dimensions!
        In cleanroom operation, maintenance, and renovation, the selection of high-efficiency particulate air (HEPA) filters directly impacts environmental cleanliness and system energy consumption. KLC recommends precise matching based on the following five dimensions:   Five Dimensions ★ Efficiency LevelDetermine requirements based on the cleanroom class (e.g., ISO Class 5). Class H13 (efficiency ≥99.97%@0.3μm) is suitable for most pharmaceutical and electronics workshops, while Class H14 (≥99.995%) is recommended for semiconductor facilities or high-level laboratories. To avoid over-specification, KLC offers precisely graded products that meet standards while controlling costs.   ★ Air Volume and Air SpeedEnsure the filter’s rated airflow meets the actual operating airflow. A face velocity of approximately 0.45 m/s is recommended. Excessive airflow velocity increases resistance, while insufficient velocity reduces airflow uniformity. KLC products undergo rigorous airflow testing to ensure stable performance at rated airflow.   ★ Resistance ParametersLower initial resistance improves energy efficiency. Typically, initial resistance ranges from 150–220 Pa, with final resistance recommended to be no more than twice the initial value. Choosing KLC’s low-resistance filters can significantly reduce fan power consumption.   ★ Size and StructureStandard sizes, such as 610×610 mm, help reduce procurement costs. For space-constrained environments, KLC’s plateless HEPA filters are thinner, have larger dust-holding capacity, and are easier to install and replace.   ★ Special CompatibilityFor environments like chemical and pharmaceutical industries, corrosion resistance and fumigation resistance are critical. With over 20 years of R&D experience, KLC provides customized solutions and recommends proper pre- and medium-efficiency filter configurations to extend the life of high-efficiency filters.     Corporate Mission and Vision As a national high-tech enterprise, KLC focuses on addressing customers’ environmental challenges by providing competitive solutions and products. We continuously create value and are committed to becoming a world-class environmental technology company.  
  • Cleanroom Equipment List: KLC provides a summary for you
    Apr 29, 2026
    Cleanroom Equipment List: KLC provides a summary for you
      Building a high-standard cleanroom (dust-free workshop) is a systematic undertaking. In addition to decoration and construction, the configuration of hardware equipment is essential. KLC has compiled the following list, categorized by function.   Functional Category List ■ Air handling and filtration system This is the core of the cleanroom, responsible for providing clean air. It includes KLC pre-/medium-efficiency filters (installed at the front end of the air conditioning unit to intercept large dust particles), KLC high-efficiency particulate air (HEPA) filters, which determine the final cleanliness level and KLC air conditioning units (AHU) responsible for regulating temperature and humidity.   ■ Terminal air supply equipment The selection is based on cleanliness requirements and airflow design. KLC FFU (Fan Filter Unit) is self-powered and suitable for high-level cleanrooms; KLC high-efficiency air outlets are suitable for general clean areas; and KLC laminar flow hoods are used to provide local Class 100 protection.   ■ Personnel and material purification equipment This is a critical barrier to prevent contamination. It includes KLC air showers (for personnel), KLC pass-through windows (for material transfer), KLC cargo showers (for large items), and KLC hand dryers are included.   ■ Local purification and auxiliary equipment KLC clean booths and clean workbenches can quickly establish microenvironments.; KLC air shower pass-through windows improve pass-through safety; KLC biosafety cabinets are suitable for biological laboratories.   ■ Environmental monitoring equipment The equipment used to verify compliance includes the KLC dust particle counter, KLC differential pressure gauge, and KLC anemometer.   ■ Basic process of cleanroom construction Solution design (determining air quality level and differential pressure) → Equipment selection (calculating air volume) → Construction and installation → Commissioning and testing. Since its establishment in 2005, KLC has been committed to providing global customers with complete air purification solutions and high-quality purification equipment.  
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