A laminar pass box, also known as a laminar flow hood or clean bench, is a specialized laboratory enclosure designed to create and maintain a sterile environment for working with samples that require protection from contamination. It operates on the principle of laminar airflow, where HEPA-filtered air is blown in a uniform, unidirectional manner across the work surface, effectively creating a barrier against external contaminants.

Here are some key features and descriptions of a typical laminar pass box:

1. **Airflow Mechanism**: The core function of the laminar pass box is its ability to generate a consistent, horizontal (or sometimes vertical) laminar airflow. This is achieved by using a high-efficiency particulate air (HEPA) filter to remove particles from the incoming air before it is blown across the work surface.

2. **Work Area**: The interior of the laminar pass box consists of a flat, smooth surface made from materials like stainless steel or other non-porous, easy-to-clean surfaces. This area is where experiments or procedures involving sensitive materials are conducted.

3. **HEPA Filter**: At the heart of the system lies the HEPA filter, which captures at least 99.97% of particles that are 0.3 microns in diameter and larger. This ensures that the air entering the work zone is virtually free of airborne contaminants.

4. **UV Lighting**: Many laminar pass boxes are equipped with ultraviolet (UV) lamps for additional disinfection capabilities. UV light can be used to sterilize the work surface and tools before use, further reducing the risk of contamination.

5. **Access Openings**: To facilitate safe transfer of materials into and out of the pass box, there are usually access ports or windows with gloves attached, allowing hands to enter while maintaining the integrity of the sterile environment.

6. **Control Panel**: A control panel is typically located outside the pass box for adjusting settings such as airflow speed, UV light operation, and sometimes even monitoring environmental parameters like temperature and humidity if required.

7. **Safety Features**: To ensure operator safety and maintain the sterility of the environment, laminar pass boxes often include alarms for filter failure, power outages, or other critical issues. They may also have interlocks to prevent opening doors when the UV lights are on.

8. **Size and Design Variations**: Laminar pass boxes come in various sizes and designs to accommodate different types of work and space requirements. Some are compact enough for small-scale operations, while others are large enough to allow multiple users or complex procedures.

Overall, a laminar pass box provides a highly controlled and sterile workspace essential for applications in microbiology, pharmaceutical research, semiconductor manufacturing, and other fields where contamination control is critical.

Founded in 2006, Foshan City Zhongjing Purification Equipment Co., Ltd. (Zhongjing in Chinese) is a provincial high-tech enterprise integrating design, development, production, sales and installation services for high-class purification equipment.The company is located in Nanhai, Foshan, a famous manufacturing city in China. The company covers an area of more than 20,000 square meters and has more than 200 employees, including more than 20 R&D personnel, and production technicians account for more than one-third of the total employees.

The products produced by Zhongjing Purification include 6 series of Pharmaceutical factory/laboratory equipment, hospital construction equipment, purification equipment, purification filters, stainless steel products, and purification engineering supporting products, with more than 400 varieties. The products are produced according to the national GMP standard, the US federal FS209E standard and the IS09001 quality certification standard.
Products are widely used in the medical industry, bio-pharmaceuticals, cosmetics, food production, electron-ic products and other industries, and have been serving the Guangdong product quality supervision and Inspection Center,Nanfang hospital,Guangdong Provincial People's Hospital,the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine,Zhuhai people's hospital, Guangdong Livzon Pharma-ceutical Group Inc., Guangzhou baiyunshan medicine co,Itd,Zhuhai United laboratories,LEE KUM KEE,Wat-sons,FAW-Volkswagen,
Lenovo Group,Beijing Genomics institutionand other well-known enterprises.

All along, our company pays attention to technological innovation, and its products have obtained a number of national invention patents and utility model patent certificates.The company now has a group of imported CNC punching machines, CNC shearing machines, CNC bending machines, fiber laser machines, automatic welding equipment and other advanced production equipment.The company selects raw materials  and accessories from well-known manufacturers such as Baosteel, Yongjin, etc., to ensure the manufacture of high-quality products for  customers.The company's products sell well all over the country and serve more than 2,000 customers. The company's brand enjoys a high reputation in southern China!

Zhongjing Purification is also the vice president unit of Guangdong Association of Cleanroom Technology, the governing unit of Guangdong Laboratory Design and Construction Technology Association, the member unit of Shenzhen HVAC Cleaning Industry Association, and the member unit of Shenzhen Cleaning Association,a member unit of the Medical Clean Equipment Engineering Branch of China Medical Equipment Association, contributing to the advancement of the industry.

Zhongjing Purification takes "making clean space safer and making customer products more high-quality" as its mission, "becoming a trusted partner of high-quality clean space" as its goal and vision, and "realistic, talented, enterprising, professional, and trustworthy" as its Entrepreneurial spirit; abide by the value concept of "service first, keep improving, Good Quality Management, Dedication, Responsibility , and Create and share together", and wholeheartedly provide customers with high-quality products with reasonable design and well-made, and continue to create value for customers.

Company values

Service first - Customer is the God ,we regard ourselves as a member of customers, in order to allow customers to make better solutions, we will understand the needs of customers in more detail and make the best product solutions.

Keep improving-Today's best performance is tomorrow's minimum requirement.
We strive to be the best at everything we do, in order to provide customers with better services and products.

Good Quality Management-We regard product quality as our life, from material selection to processing technology, we strictly control and strive for perfection

Dedication our own post, we do what we should do well, do not need the supervision of others, are self-conscious, result-oriented, and go all out to make achievements.

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