Appeared in 1950s and 1960s, the bag-in/ bag-out (BIBO) filter has been widely used in various fields with high risks or high requirements for isolation. For examples: chemical and biological (CB) protection, chemical, biological and radiological (CBR) protection, nuclear chemical, biological and chemical (NBC) protection, hospital isolation rooms, pharmaceutical equipment, microelectronic environment, food processing areas, biological research, genetic and biotechnology laboratories, industrial processing and discharge systems, chemical processing equipment, animal diseases research laboratories, radioisotope processing equipment, nuclear power station, strategic nuclear facilities, DOE equipment, military bases, etc.
Constitutive elements of the filter are similar to that of a combined air-conditioning unit, which are assembled into the BIBO chamber according to the needs of use, including the commonly used pre-filter, high efficiency particulate air (HEPA) filter, high efficiency gas absorption (HEGA) filter, precision ScanTest sections, etc.
In general, the BIBO filter consists of two parts: the filter unit and the detection unit. The simplest filter unit only contains a HEPA filter. If there is no other filtering equipment to filter air before it enters the BIBO filter, a pre-filter is needed to protect the HEPA filter; And if adsorption requirements exist, a HEGA filter is needed to be configured; The detection unit refers to a/an automatic /manual precision ScanTest section.
In addition to the above main components, some supporting devices are arranged on the BIBO chamber, like pressure gauges, pressure taps, quick connection ports, etc., and between them a miniature HEPA filter is set to ensure isolation from the outside world. The filter, together with the supporting bubble tight isolation dampers, forms a complete air filtration isolation system, which is called "containment system" in North America.
The biggest feature of the BIBO filter is that installation, replacement, and inspection of the filter are all carried out under the protection of a PVC (polyvinyl chloride) bag (or a high-temperature bag). The filter unit does not contact the outside air at all, thus ensuring the safety of personnel and the environment and facilitating replacement.
The BIBO housing is equipped with a high-efficiency HEPA filter air duct, which is widely used in places used for the production and storage of hazardous substances, mainly involving hospitals, laboratories, and hazardous waste treatment plants. It effectively prevents contamination caused by radioactive gases, pathogens, and toxic chemicals.
Safe and reliable performance
It adopts totally enclosed bag design and guarantees the safety of personnel in their replacement work.
Installation of the filter
In order to ensure airtightness of the system, the HEPA filter is embedded in the sealing frame with a movable buckle locking design, on which a control lever is arranged for easy disassembly. The primary filter is installed on a supporting frame.
Replacement of the filter
To replace the filter, first open the hatch cover, stretch the polyethylene plastic bag, and then remove the used filter material and put it in the bag, and finally tighten the flange to prevent the leakage of contaminants.
Sturdy structure free from disturbance
The outer surface of the standard chamber is made of steel coated with white epoxy paint, which is able to withstand a positive pressure of up to 2,500 Pa and a negative pressure of up to 3,000 Pa, and can be used at as low as 60 ºC.
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