F-F-320B
23 June 1985
SUPERSEDING
F-F-320A
March 29, 1971
FEDERAL SPECIFICATION
FILTERS, ELECTRONIC AIR CLEANING, IONIZING PLATE TYPE
This specification was approved by the Assistant Administrator, Office
of Federal Supply and Services, General Services Administration, for the
use of all Federal agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope. This specification covers electronic air cleaning filters
having ionizing sections and charged, plate-type collector sections, designed
for use in nonresidential air cleaning systems.
1.2 Classification. The filter units shall be of the following types,
styles, classes, groups, and sizes, as specified (see 6.2):
Type I - Oiled-plate type with traveling or oscillating washwater and
adhesive-oil system, ionizing type
Type II - Dry-plate type with washwater/detergent system and permanent
after-filters, ionizing type
Type III - Dry-plate type with disposable after-filter media, ionizing
type
Style A - Roll-type filter, vertical, standard design
Style B - Roll-type filter, vertical, compact design
Style C - Boll-type filter, horizontal
Style D - Extended media-type, stationary filter
Class 1 - Standard efficiency
Class 2 - High efficiency
Group 1 - Factory-assembled units
Group 2 - Field-assembled units
Sizes - 1,000 to 175,000 cubic feet per minute (cfm) (see 3.7)
2. APPLICABLE DOCUMENTS
2.1 The following documents, of the issues in effect on date of invitation
for bids or request for proposal, form a part of this specification to the
extent specified herein.
FSC 4460
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