The ultra-clean workbench is a vital tool in laboratory and production settings, offering several advantages that make it an essential piece of equipment. It is user-friendly, efficient, and designed to maintain a sterile environment, ensuring the safety of sensitive materials during procedures such as inoculation or transfer. The workbench can be operated after being turned on for at least 30 minutes, allowing ample time for the laminar airflow system to establish a clean environment. This makes it ideal for long working hours, especially in industrial settings where large-scale vaccination or cell culture operations are common.
Powered by a three-phase motor with a power range of 145–260W, the ultra-clean workbench circulates air through a high-efficiency filter made of special microporous foam sheets. This filter effectively removes particles larger than 0.3 micrometers, including dust, fungi, and bacterial spores, creating a continuous flow of sterile air. The air velocity ranges between 24 to 30 m/min, which is sufficient to prevent contamination from surrounding air without interfering with flame-based sterilization methods like alcohol lamps or Bunsen burners.
In the event of a power outage, any exposed materials may become contaminated. In such cases, it’s important to complete the task quickly, label the containers, and decide whether the material should be discarded or moved to another stage of cultivation. If the material is in the proliferation phase, it should not be used for further propagation but instead transferred to rooting culture. For general materials, disposal might be necessary due to the risk of contamination. If the process is in the rooting stage, the material can be left for later planting.
The workbench operates on a three-phase four-wire system, with one wire connected to the ground. Proper wiring is crucial; if the wires are connected incorrectly, the airflow direction may reverse, causing the front of the bench to have no airflow. This issue can be resolved by swapping two of the wires. If only two phases are connected or if there is poor contact, the motor may overheat and get damaged. These precautions must be clearly explained to all users to avoid unnecessary damage and ensure safe operation.
The air inlet is typically located at the back or front of the unit, covered by a metal mesh with a foam or non-woven fabric filter to trap large particles. Regular inspection and cleaning are necessary, and any aging or damaged filters should be replaced promptly. Leaks in the system should also be sealed using materials like tape or cotton to maintain the integrity of the airflow.
To extend the lifespan of the ultra-clean workbench, it should be placed in a clean, controlled environment. In temperate regions, it can be used in standard laboratories, but in tropical or dusty areas, it should be installed in a room with double doors to minimize external contamination. Never place the inlet hood near open windows or doors, as this can reduce filter efficiency and shorten its life.
Sterile rooms should be regularly cleaned and disinfected using 70% alcohol, 0.5% phenol, or 2% chlorhexidine. Formalin and potassium permanganate can be used for fumigation, and UV sterilization lamps should be used for at least 15 minutes before each use. However, UV light should be turned off before entering the room, as ozone generated during the process can be harmful. The UV lamp inside the workbench should be positioned outside the illuminator to avoid interference with the workflow.
Proper maintenance is key to the longevity and performance of the ultra-clean workbench. Regular cleaning, filter replacement, and inspection of electrical components are essential. The coarse filter should be cleaned or replaced every 2–3 months, while the high-efficiency filter should be replaced when wind speed drops below 0.32 m/s. After replacing the filter, it's important to check the airflow and cleanliness levels using a particle counter.
Zhejiang Sujing Purification Equipment Co., Ltd. is a leading manufacturer based in Shaoxing, Zhejiang Province. Specializing in air purification systems, the company provides solutions for industries such as biomedicine, electronics, pharmaceuticals, and more. Their products include purification workbenches, biological safety cabinets, fume hoods, and air showers, all meeting international standards like ISO14644-1 and GMP. With a reputation for quality and reliability, Zhejiang Sujing serves both domestic and international markets, offering professional design, installation, and technical support. Their commitment to innovation and customer satisfaction ensures they remain a trusted name in the industry.
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