1、A-A-50554 9999974 0175625 522 = INCH-POUND A-A-505 54 October 9, 1997 SUPERSEDING November 27,199 1 F-F-2790 COMMERCIAL ITEM DESCRIPTION FILTER, AIR-EXTENDED AREA, INITIAL INSTALLATION The General Services Administration has authorized the use of this Commercial Item Description for all federal agen
2、cies. 1. SCOPE. This specification covers replaceable, extended media area type air filters with externally supported, nonsupported, or self-supporting cartridges. The filters are installed in permanent metal holding frames and housings as required for use in air conditioning, heating, and ventilati
3、ng systems for removing particulate matter found in the atmosphere. 2. CLASSIFICATION. 2.1 Classification. Filters covered by this specification will be of the following types and grades, as specified (see 7.2). Type I - Prefilter - Externally supported or nonsupported cartridge Grade A - 30 percent
4、 commercially rated efficiency in accordance with Grade B - 40 percent commercially rated efficiency in accordance with Grade C - 85 percent commercially rated efficiency (minimum of 58 percent per Grade D - 95 percent commercially rated efficiency (minimum of 78 percent per ASHRAE 52 using atmosphe
5、ric dust ASHRAE 52 using atmospheric dust ASHRAE 52 using atmospheric dust) ASHRAE 52 using atmospheric dust) I Beneficial comments, recommendations, additions, deletions, and any data which may be of use in improving this document should be addressed to: Commanding Officer (Code 15E2), I Naval Cons
6、truction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301. AMSC NIA FSC 4130 Licensed by Information Handling Services A-A-50554 9939974 0375627 463 A-A-50554 Type II - Afterfilter - Externally supported or nonsupported cartridge Type IIi - Afterfilter - Self-supporting cartridge Grad
7、e E - 95 percent rated efficiency (Dioctyl Phthalate OP) Test using 0.3 micron particles) Grade F - 99.97 percent rated efficiency OP Test using 0.3 micron particles) 3. SALIENT CHARACTERISTICS. 3.1 Descriution. Filters shall be of the extended media area type for use in air conditioning, heating, a
8、nd ventilating systems. Each filter assembly shall include, but not be limited to, the following basic components: a. A permanent holding frame. b. A preformed, sealed, and disposable cartridge of the pleated or extended area type. c. A factory assembled side or bottom loading housing where so speci
9、fied (see 3.9.1.2 and 3.9.2.2). d. One direct reading draft gage per filter bank (see 3.10). 3.2 Zinc-coated steel. Galvanized and galvannealed sheet steel shall conform to ASTM A 525. The weight of zinc coating for galvanized steel media shall not be less than that specified in ASTM B 633 for type
10、LS electroplate zinc coating. 3.3 Aluminum. Aluminum shall be an alloy conforming to the requirements of ASTM B 209. The alloy shall have mechanical properties, formability, and a surface finish suitable for the intended application. 3.4 Corrosion-resistant steel. Unless a particular type of corrosi
11、on-resistant steel is specified (see 7.2), corrosion-resistant steel shall conform to any of the 300- or 400-series of ASTM A 167 or A 176, as applicable. 3.5 Aluminized steel. Aluminum-coated steel sheets shall be coated with aluminum on both sides by the hot-dip process. The total weight of coatin
12、g on both sides of the sheet shall be not less than .40 ounces per square foot (122 grams per square meter) of sheet. 3.6 Dissimilar metals. Joints between dissimilar metals, including bolts, nuts, rivets, and other fastenings and fittings shall be protected against galvanic corrosion by the proper
13、selection of materials, plating isolation, insulation, area relationships or other means, providing equivalent protection. 3.7 Fire and casualtv hazards. Filters shall meet the fire-resistant requirements of UL 900. Filters shall be either UL class 1 or UL class 2, at the option of the contractor, u
14、nless UL class 1 filters only are specified in the invitation for bids (see 7.2). Classifications under UL 900 shall be interpreted as follows: 2 Licensed by Information Handling ServicesA-A-50554 9999974 OL75b28 3T5 A-A-50554 4 a. Class 1 - Filters which, when clean, do not contribute fuel when att
15、acked by flame and emit b. Class 2 - Filters which, when clean, bum moderately when attacked by flame or emit only negligible amounts of smoke. moderate amounts of smoke or both. Adhesive coatings used on filters shall have a flashpoint of not less than 25 degrees ( O) Fahrenheit (1 63“ Centigrade)
16、as determined by ASTM D 92. 3.8 Health requirements. The media shall be nontoxic and without any detectable odor. The media shall have no adverse effect on the health of personnel handling same or on occupants of spaces served by the media. Questions pertinent to these effects shall be referred by t
17、he procuring activity to the appropriate medical authority who will act as an advisor to the procuring agency. 3.9 Construction. The equipment shall be designed and constructed to facilitate field maintenance. All adjustments and replaceable accessories shall be readily accessible. Conditions which
18、can be hazardous to personnel or deleterious to equipment shall not be permitted. 3.9.1 Type I and II filters. 3.9.1.1 Holding frames. When specified (see 7.2), each filter shall be provided with a permanent holding frame. The permanent holding frame shall be manufactured of not less than 16-gage ma
19、terial as specified in 3.2 through 3.5. The permanent holding frame shall be equipped with suitable cartridge or media retainer clips along with cartridge supporting wire work and gaskets as required by design. There shall be no air leakage between the permanent holding frame and cartridge that may
20、cause air to bypass the filter. The permanent holding frame shall be provided with matching rivet holes to facilitate installation. The dimensions of the holding frame shall be as specified in 3.13. 3.9.1.2 Filter housing. When specified (see 7.2), a factory assembled side or a bottom access filter
21、housing(s) shall be provided. The housing(s) shall be manufactured of minimum l-gage material as specified in 3.2 through 3.5. The housing(s) shall be completed with mating flanges, quick opening, double skin insulated or rigidly insulated access doors, and gasketed channels to provide a leakproof s
22、upport for the filters. When specified (see 7.2), a nominal 2-inch prefilter track shall be provided. 3.9.1.3 Filter cartridge. Filter cartridge shall be a preformed, sealed, and disposable cartridge of the pleated or extended area type. 3.9.2 Type III filter. 3.9.2.1 Holding frame. When specified (
23、see 7.2), each filter shall be furnished with a permanent holding frame. The frame shall be manufactured of not less than 16-gage material as specified in 3.2 through 3.5. The holding frame shall be equipped with suitable cartridge retainer clips. The dimensions of the holding frame shall be as spec
24、ified in 3.13. 3 Licensed by Information Handling ServicesA-A-50554 3.9.2.2 Filter housing. When specified (see 7.2), a factory assembled side or a bottom access filter housing(s), with a nominal 2-inch prefilter track, shall be provided. The housing(s) shall be manufactured of minimum 16-gage mater
25、ial as specified in 3.2 through 3.5. The housing(s) shall be completed with mating flanges, quick opening, double skins insulated or rigidly insulated access doors, support channels, positive edge seals, and a filter sealing mechanism to provide a leakproof installation for the filter. 3.9.2.3 Filte
26、r cartridge. A preformed, close-pleated replaceable type filter cartridge shall be provided. The filter cartridge shall consist of a frame, media, fire-retardant sealers, and a gasket on downstream face, where required, to prevent any air bypass leakage. If separators are provided, they shall be alu
27、minum. 3.10 Draft gage. One direct reading draft gage shall be furnished with each filter bank complete with tips and necessary accessory items to provide zero adjustment and accurate operation. 3.11 TvDe I and II filters. Type I and II filter performance requirements shall be as follows for each gr
28、ade using a 24“ X 24“ nominal filter. 3.1 1.1 Pressure drop. Pressure drop shall be measured by the difference in pressure in the duct immediately before and after the filter. 3.1 1.1.1 Initial pressure drop. With clean filters, the average initial pressure drop measured in inches water gage (wg) (P
29、ascals (Pa), shall not exceed the values listed at the specified rated airflow capacity, measured in cubic feet per minute (cfm) (cubic meters per hour (CU mh). RATED AIRFLOW 4 Licensed by Information Handling ServicesA-A-50554 3.1 1.1.2 Final pressure drop. The final pressure drop of each filter ca
30、rtridge, when operated at rated airflow capacity, shall not exceed the following: 3.1 1.2 Average synthetic dust weight arrestance. The average synthetic dust weight arrestance shall not be less than the following at the final pressure drop in 3.1 1.12: RATED AIRFLOW 3.11.3 Average dust spot efficie
31、ncy. The average dust spot efficiency shall not be less than the following as determined in accordance with ASHRAE 52 using atmospheric dust: LESS THAN 20 5 Licensed by Information Handling ServicesA-A-50554 9999974 0375633 99T W GRADE A-A-50554 1500 CFM I 2000 CFM I 2,500 CFM 3.1 1.4 Average dust h
32、olding capacity. The average dust holding capacity shall not be less than the following: GRADE E F RATED AIRFLOW 6 INCH DEPTH 12 INCHDEFTH 650 CFM 1,000 CFM (1,700 CU M/HR) (1,105 CU M/HR) Pa MCHES wg “CHES wg (Pa) 2.0 (5 00.0) 2.0 (500 .O) 2.0 (5 OO. 0) 2.5 (625.0) 3.12 Tvue IIi filter. 3.12.1 Init
33、ial pressure drop. With clean filters, the initiai pressure drop shall not exceed the values listed at the given rated air flow capacity. (In no case shall media velocity exceed 11 feet per minute.) 3.12.2 Final pressure drop. The final pressure drop of each filter, when operated at rated capacity,
34、shall not exceed the following: Licensed by Information Handling ServicesA-A-50554 W 9999974 0375632 826 W A-A-5 05 5 4 3.12.3 Eficiency. The efficiency of the type III filters shall be determined in accordance with MIL-STD-282 using 0.3 micron particle of thermally generated DOP smoke, or any equiv
35、alent grade of DOP, and shall not be less than the following: 3.13 Dimensions. Unless otherwise specified (see 7.2), the actual outside face dimensions of the holding frame shall be 24 inch by 24 inch (610 millimeters (mm) by 610 mm) and with the depth as manufacturers standard. The nominal face dim
36、ensions of the filter cartridge shall be 23.5 inch by 23.5 inch (598 mm by 598 mm) with the depth as required by design to comply with the requirements as specified in 3.7. The actual face dimension of the cartridge shall be not less than 1/4 inch (6 mm) in either width or length from the nominal me
37、dia face dimensions (for grades A through E). Grade F filter cartridge dimension shall be 24.0 inch (610 mm) by 24.0 inch (610 mm), +O inch (+O mm), -1/16 inch (-2 mm), including the header frame, and depth as required by design. 3.14 Interchangeability. Ail air filter units of he same classificatio
38、n furnished with similar options under a specific contract shall be identical to the extent necessary to insure interchangeability of component parts, assemblies, accessories, and spare parts. 3.15 Treatment and oaintinp. Unless otherwise specified (see 7.2), when mediaframes, holding frames, and ho
39、usings are furnished they shall be treated and painted in accordance with the manufacturers standard practice. All surfaces of the frames or housings, other than corrosion- resisting steel, shall be protected against corrosion and present a neat appearance. 3.16 Marking. 3.16.1 Commercial marking. E
40、ach filter shall be marked with the following: a. The name or trade name of the manufacturer or vendor. b. A distinctive model number, catalog designation, or equivalent marking. If a manufacturer produces air-filter units of the same model at more than one manufacturing facility, each filter shall
41、have a distinctive marking. Such markings shall identi the filter as the product of a particular facility and may be in code. 3.16.2 Military marking. When specified (see 7.2), additional Military marking for each filter shall be fbmished. Military marking shall be as permanent as the normal life ex
42、pectancy of the filter, and shall include the applicable National Stock Number and such other essential information as may be specified or approved by the procuring activity. Letters, numerals, and other characters shall be such as to be clearly legible. 7 Licensed by Information Handling Services A
43、-A-50554 = 9799974 017.5633 7b2 D A-A-50554 4. REGULATORY REQUIREMENTS. 4.1 Recovered Materials. The offeror/contractor is encouraged to use recovered materials to the maximum practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR). Unless otherwise specified her
44、ein, all equipment, material, and articles incorporated in the work covered by this description are to be new and fabricated using materials produced from recovered materials to the maximum extent possible, without jeopardizing the intended use. The term “recovered materials” means materials which h
45、ave been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products are allowed under this description unless otherwise specified. 4.2 Metric
46、products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, provided they fail within specified tolerance using conversion tables contained in the latest version of IEEWASTM SI 10, and all other requirements of this Commer
47、cial Item Description including form, fit and function are met. Ifa product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the contracting officer to determine if the product is acceptable. The contractin
48、g oficer has the option of accepting or rejecting the product. 5. QUALITY ASSURANCE PROVISIONS. 5.1 Product Conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producers own drawings, specifications, standards, and quality ass
49、urance practices, and be the same product offered for sale in the commercial market. The product must be offered for sale in the commercial marketplace by a nationally recognized brand found in standard vendor catalogs. The government reserves the right to require proof of such conformance prior to first delivery, and thereafter as may be otherwise provided for under the provisions of the contract. 6. PACKAGING. Preservation, packing and marking shall be as specified in the contract or order. 7. NOTES. 7.1 Part or Tdentifving Number PIN) . The PIN to be used
