OpenAire™ Marine
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The OpenAire™ Marine CBR Filter System adds two key features to the OpenAire™ system: (1) All aluminum surfaces of the housing and covers are anodized and sealed for greater corrosion resistance, and (2) Filter covers are retained with spring-loaded hand nuts for improved vibration resistance. These two features make the OpenAire Marine system ideal for today’s ship applications where topside weight and cost are of paramount concern.
The OpenAire™ Marine CBR Filter System offers higher filtration capacities at lower weight and cost, making it ideal for most ColPro applications. These filter systems hold from 1 to 128 CBR filters (25,600 cfm) and weighs up to 50% less (5-deep length) than the U.S. Navy housing.
The standard configuration uses a 2-piece front cover system for independent compression of gas and particulate filters. It is also available with a 1-piece front cover when using the NATO CBR filter.
A fully functional CBR Filter System includes the filter system described in this section along with CBR filters and prefilters.
To determine filter system size, use the following information based on the flow rate required and available dimensional constraints. Housings are available in 8 lengths. Choosing the longest length that meets your dimensional constraint will provide the lowest cost system.
Filter System Arrangement Filter System Dimension Flow Rate at 200 CFM Per Filter W x H Width Height Depth (# of Filters) 1 2 3 4 5 6 7 8 1 x 1 36" 36" 200 400 600 800 1000 1200 1400 1600 1 x 2 36" 63" 400 800 1200 1600 2000 2400 2800 3200 1 x 3 36" 90" 600 1200 1800 2400 3000 3600 4200 4800 1 x 4 36" 117" 800 1600 2400 3200 4000 4800 5600 6400 2 x 1 63" 36" 400 800 1200 1600 2000 2400 2800 3200 2 x 2 63" 63" 800 1600 2400 3200 4000 4800 5600 6400 2 x 3 63" 90" 1200 2400 3600 4800 6000 7200 8400 9600 2 x 4 63" 117" 1600 3200 4800 6400 8000 9600 11200 12800 3 x 1 90" 36" 600 1200 1800 2400 3000 3600 4200 4800 3 x 2 90" 63" 1200 2400 3600 4800 6000 7200 8400 9600 3 x 3 90" 90" 1800 3600 5400 7200 9000 10800 12600 14400 3 x 4 90" 117" 2400 4800 7200 9600 12000 14400 16800 19200 4 x 1 117" 36" 800 1600 2400 3200 4000 4800 5600 6400 4 x 2 117" 63" 1600 3200 4800 6400 8000 9600 11200 12800 4 x 3 117" 90" 2400 4800 7200 9600 12000 14400 16800 19200 4 x 4 117" 117" 3200 6400 9600 12800 16000 19200 22400 25600
Section view of CBR Filter Housing showing airflow path
The NBC filter removes solid, aerosol, and gaseous NBC contamination using a two filter elements: an inner high efficiency particulate air (HEPA) filter and an outer gas adsorber as shown above. Each NBC filter has a rated flow capacity of 200 cfm (5.7 m3/min). It is manufactured in accordance with U.S. military specification MIL-F-51527.
The HEPA filter is the "first-stage" filter element of the NBC filter. Air passes first through the HEPA filter where solid particles (e.g., dust and dirt) are removed from the airstream, including biological aerosols and radioactive particles. The HEPA filter uses a high-efficiency pleated filter media approved for shipboard use. The HEPA filter has a rated efficiency of 99.97% at 0.3 microns.
The HEPA filter has an initial (clean) flow resistance (pressure drop) of approximately 0.7 in. wg (174 Pa). During operation, dust collected by the HEPA filter creates additional restriction but does not degrade the collection efficiency. The HEPA filter weighs approximately 10 lbs (4.5 kg).
The gas adsorber is the "second-stage" filter element of the NBC filter. As air passes through the gas adsorber, chemical warfare gases are removed through physical and chemical adsorption using a packed bed of granular carbon. This carbon bed has additional treatments for enhanced performance against certain gases and in presence of high relative humidity.
The gas adsorber has a flow resistance (pressure drop) of approximately 3.5 in. wg (872 Pa). During operation, the flow resistance of the gas adsorber does not increase. However, its weight will increase as water vapor is adsorbed. The initial (dry) weight of the gas adsorber is approximately 35 lbs (16.0 kg).
Parts
Index No. Description P/N Unit Qty Per Housing 1 
Nut, HEPA Cover 6263427-00 EA 4 2 Cover, HEPA, OpenAire NW000984-01 EA 1 3 O-ring, HEPA Cover 6263430-01 EA 1 4 Nut, Gas Cover 6263434-00 EA 4 5 Cover, Gas, OpenAire NW000985-01 EA 1 6 O-ring, Gas Cover 6263430-02 EA 1 7 Stud, HEPA Cover 6573702-01 EA 4 8a Stud, Gas Cover
(Housings containing from 1 to 5 filters)
6573702-02 EA 4 8b Stud, Gas Cover
(Housings containing from 6 to 8 filters)
NW001463-00 EA 4 9 Grease, Gasket, O-Ring NW000986-00 EA As required 10 Thread Compound, Antiseize NW000987-00 EA As required
