The ultra-clean workbench is a vital tool in laboratory and industrial settings, offering a controlled, sterile environment for sensitive procedures. Its key advantages include ease of use, comfort, high operational efficiency, and minimal preparation time—typically requiring only 30 minutes or more to stabilize before use. This makes it ideal for continuous operation in environments where large-scale tasks like vaccination or cell culture are common. The unit is powered by a three-phase motor with a power range of 145–260W, which pushes air through a high-efficiency filter made of microporous foam sheets. This creates a laminar airflow of up to 24–30 m/min, effectively removing particles larger than 0.3 μm, including dust, fungi, and bacterial spores. The clean air flow prevents contamination while allowing the use of alcohol lamps or Bunsen burners without interference.
In case of a power outage, the workbench loses its protective airflow, making exposed materials vulnerable to contamination. In such scenarios, it’s crucial to complete the task quickly, label the containers, and decide whether to discard, re-culture, or store the material depending on its stage of development. Proper training and awareness among staff are essential to prevent such issues.
The workbench uses a three-phase four-wire system, with one line connected to the casing and grounded for safety. If the wiring is incorrect, the fan may reverse, causing abnormal sounds. A quick fix involves swapping two wires. If the fan doesn’t operate correctly due to missing phases or poor contact, immediate shutdown and repair are necessary to avoid motor damage.
The air inlet, located at the back or front, is covered with a metal mesh and a coarse filter (foam or non-woven fabric) that should be cleaned or replaced regularly. Any leaks in the system must be sealed with tape or other suitable materials. The main HEPA filter can also be replaced when clogged, ensuring consistent airflow and sterility.
To maximize the lifespan of the workbench, it should be placed in a well-controlled indoor environment, especially in tropical or dusty regions. Avoid placing the inlet near open doors or windows to protect the filters from external contaminants.
Sterilization of the surrounding area is critical. Regular cleaning with 70% alcohol, 0.5% phenol, or 2% chlorhexidine helps maintain a sterile environment. Formalin fumigation combined with UV sterilization is also recommended. UV lamps inside the workbench should be turned on for over 15 minutes before use, but they should be turned off before entering the workspace due to ozone production, which can be harmful to health.
UV lamps can be mounted outside the workbench, avoiding direct exposure to the operator. Internal UV lamps are ineffective if enclosed in glass, as UV rays cannot penetrate it. Instead, quartz glass is used for proper sterilization.
Proper operation and maintenance are essential. Before use, the workbench should be turned on 30 minutes in advance, with UV lamps activated for surface disinfection. Afterward, the UV light is turned off, and the fan is started. New or long-unused units should be thoroughly cleaned and sterilized before use.
Regular maintenance includes cleaning the coarse filter every 2–3 months, wiping the UV lamp surface, and replacing the HEPA filter when wind speed drops below 0.32 m/s. After replacement, the workbench should be tested for cleanliness using a particle counter.
For use in barrier systems, the workbench is reserved for animal models and transgenic mice. Each session requires UV irradiation for 30 minutes, followed by surface disinfection with 75% alcohol or peracetic acid. All operations must follow strict aseptic protocols, and after use, the workbench should be wiped down and UV sterilized for 15 minutes.
Zhejiang Sujing Purification Equipment Co., Ltd., based in Shaoxing, Zhejiang, is a leading manufacturer of purification equipment, serving industries such as biomedicine, pharmaceuticals, electronics, and food processing. They provide customized solutions according to international standards, ensuring high-quality performance and reliability. Their products, including biosafety cabinets, fume hoods, and clean benches, are widely used across various sectors and have gained recognition in domestic and Southeast Asian markets. With a commitment to quality, service, and affordability, Zhejiang Sujing continues to support global clients in maintaining clean and safe working environments.
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