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General
Flanders Type 9 Holding Frames are used to con-
struct built-up filter banks for upstream or down-
stream access using ASHRAE rated filters. Type 9
frames will accommodate 1”, 2” or 4” panel filters
including metal washable filters. They are also suit-
able for bag filters, self-supporting rigid filters and
disposable type carbon elements. A filter-to-frame
seal is effected by a factory-installed gasket and
positive-sealing fasteners.
Options
The standard frame is nominal 3” deep and con-
structed of 16 ga. galvanized steel. Type 304
stainless steel is an available option. Frames are
also available in nominal 2”, 4”, and 6” depth.
Actual depth is 1/8” under nominal size.
Installation Consideration
Type 9 Frames can be assembled with pop rivets or
nuts and bolts. Prior to assembly, all sides should
be caulked with a non-hardening compound to pre-
vent air bypass. Filter banks three frames high or
higher should be strengthened with 3” wide 16 ga.
stiffeners between each vertical row.
Fasteners
Flanders offers several types of fasteners for use
with Type 9 Frames. Refer to the Fastener
Selection Chart on the reverse side of this sheet to
select the appropriate fastener.
Guide Specifications
1.0 Filter holding frames shall be Type 9 as manufac-
tured by Flanders.
1.1 Frames shall be manufactured of 16 ga. galva-
nized steel and furnished with factory-installed
gasketing.
1.2 In-line depth shall be 3” in order to effect a rigid
and secure filter bank assembly. Filter fasteners
shall be selected to meet the requirements of the
specified filters. Fasteners shall not require the
use of tools to secure the filter.
Flanders - Foremost in Air Filtration
Corporate Headquarters, St. Petersburg, FL
119
Type 9
Filter Holding Frames and Fasteners
Models 9HF-xxxxx
9HF-12243R
9HF-16203R
9HF-16253R
9HF-20203R
9HF-20243R
9HF-20253R
9HF-24243R
12
16
16
20
20
20
24
24
20
25
20
24
25
24
2-7/8
2-7/8
2-7/8
2-7/8
2-7/8
2-7/8
2-7/8
Model
Number
HWD
Dimensions, Inches
Note: 1. Tolerances are +0 inch and -1/16 inch
2. Special sizes are available upon request
Standard 3 inch Holding Frames
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