The secondary biosafety cabinet is currently the most widely used cabinet type. Like Class I biosafety cabinets, Class II biosafety cabinets also have airflow into the front window opening, known as the "inlet airflow", to prevent aerosols that may be generated during microbial operations from escaping from the front window. Unlike Class I biosafety cabinets, the unfiltered intake air stream is captured by the incoming grid before reaching the work area, so the test product is not contaminated by outside air. A unique feature of the Class II biosafety cabinet is that the vertical laminar airflow filtered through the HEPA filter is blown from the top of the safety cabinet and is referred to as the "downward flow." The sinking airflow is continuously blown through the working area of ​​the safety cabinet to protect the test items in the cabinet from external dust or bacteria.
According to the regulations, the secondary biosafety cabinet can be divided into four levels according to the inlet airflow speed, exhaust mode and circulation mode: A1 type, A2 type, B1 type and B2 type. All secondary biosafety cabinets provide protection for workers, the environment and products.
The performance of each cabinet type of the second-level biosafety cabinet is designed for the level 4 biosafety level of the third-class biosafety cabinet. It is the safest cabinet with the highest safety protection level in the world. The cabinet is completely airtight, 100% fully exhausted, all gases are not involved in the cycle, the staff is operated by gloves connected to the cabinet, commonly known as glove boxes, and the test products enter and exit the safety cabinet through the double-door transfer box to ensure no pollution. Suitable for high-risk biological tests.
An A2 type secondary biosafety cabinet with an external drain pipe cover can be used under operating conditions that allow for the circulation of chemical gases. The discharge pipe cover is different from the general hard pipe in that it has an intake hole for sucking air; the discharge pipe cover is connected to the outer pipe and then connected to an external fan. The air intake on the drain pipe cover is essential for the A2 type II biosafety cabinet to maintain the balance of intake and sink airflow through the built-in fan. If a sealed external duct is used, the intake air flow will be too strong, which may cause the safety cabinet to protect the product; and the air inlet hole in the discharge duct cover can draw air from the room without affecting the airflow balance in the safety cabinet. This condition applies only to trace amounts of toxic chemicals.
If circulating chemical gases are not permitted, a B2 type secondary biosafety cabinet equipped with a rigid tube must be used. Since the B-type safety cabinet is not an independent balancing system, its built-in fan can only produce a downdraft flow, and the safety cabinet relies on an external exhaust fan to make the intake air flow. This type of safety cabinet is complicated to install and maintain, because the external exhaust fan must be balanced with the built-in fan, otherwise it will lead to the failure of the safety performance of the operator or product.
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The laundry rack-X type stainless Steel Laundry Rack / foldable laundry rack/ laundry rack for outdoor using/ . Made of stainless steel material , easy folding and carrying , taking less space to storage in house .
Features:
MILDEW-PROOF AND RUST-RESISTANT: Waterproof epoxy coating helps eliminate rust and mildew. Good stability and load-bearing capacity, long service life.
It easy to open, close and it is the perfect solution to organize your clothes. There is no need to leave clothes on a messy of bed anymore.
Free installation foldable and save space. Perfect for indoor drying your laundry, perfect for heavy items.
A full-featured choice, this drying rack has hanging space, a sweater shelf, and shoe rack. Quilts, clothes and shoes can be drying.
Specification:
--The max size: 240*150*65cm
--Gross weight: 5kgs
--MATERIAL: Stainless steel
--Packing size : 155*16*8cm/Ctn
More details as follows :
Q: Are you factory or trading company ?
A: We are factory , exported foreign over decade with rich experiences .
Q: We can change the color of the rubber cover ?
A: yes , the regular is black , you also choose other color .
Q:What`s the MOQ ?
A: 50 PCS.
Q: Can I have a sample ?
A: It`s ok .
Q:What`s your price ?
A: It`s depends on your demands, quantity , we can offer you lowest price .
Q:What`s your delivery time ?
A: Sample order : 3days , bulk order : 23-25days .
Q: Can we use our logo or brand on the package ?
A: yes , OEM is ok .
Q: What`s the payment :
A: (1) T/T: 30% deposit be paid in advance , the 70% of total payment see the copy of B/L.
(2) L/C it`s ok .
(3) Cash also ok .
More inquires or questions , plz feel free to contact us !
Welcome to visit our factory !
Laundry Rack
Folding Laundry Rack,Steel Laundry Rack,Laundry Drying Rack,Metal Laundry Rack
Yongkang Aoyi Industry&Trade Co., Ltd. , https://www.aoyiladder.com