F-F-320C
(DoD activities may obtain copies of those adopted voluntary standards listed in the DoD Index
of Specifications and Standards free of charge from Defense Automated Printing Services,
Attn: DoDSSP, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)
2.2 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 Description. The filter units shall consist essentially of electronic ionizing-type, particulate
collecting cells, sheet metal enclosure panels, power pack(s), and additional devices or systems for
washing away or storing collected particulate accumulations. Group 1 units shall be factory-
assembled except for the power pack and wash systems, which may be shipped unmounted at the
option of the supplier. Group 1 units shall be designed for floor mounting unless suspension
mounting is specified (see 6.2). Group 2 units shall be shipped with all components necessary for
field assembly at the site, including the following:
a.
The ionizing-collecting cells.
b.
Power pack(s).
c.
Top and side enclosure panels.
d.
Safety interlocks.
e.
Warning signs.
f.
After-filters.
g.
Fasteners and miscellaneous hardware.
3.1.1 Type I. Type I units shall be equipped with one or more motorized, traveling, or oscillating
manifold(s), to spray washwater and apply adhesive-oil. The manifold(s) shall be of adequate size
to provide proper distribution of the washwater and adhesive-oil. The water and adhesive
systems shall be complete with all necessary piping, spray arms or nozzles, flexible hoses, electric
motor drives, adhesive pump with suction hose, and specified controls.
3.1.2 Type II. Type II units shall be equipped with a fixed, traveling, or oscillating washwater
manifold(s) as required to provide full, effective spray coverage of the collector cells. The
washwater manifold(s) shall also serve to distribute a pumped detergent over the plate surfaces
prior to or during the wash cycle. As an alternative, a separate detergent manifold may be used.
A detergent pump with suction hose shall be furnished with each unit. The manifold(s) shall
include a separate connection for the detergent line. When specified (see 6.2), group 1 units with
fixed manifolds, having capacities of 3,000 cfm (1.41 m3/s) or less, may be provided with a
detergent dispenser or pump.
3
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