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Flanders - Foremost in Air Filtration
Corporate Headquarters, St. Petersburg, FL
96
Guide Specifications
1.0 General
1.1 Minipleat HEPA/ULPA filters shall be Alpha Panel
Model AP493 or AP591 as manufactured by
Flanders.
1.2 Filter sizes and capacities shall be as scheduled
on the drawings.
1.3 Filter construction shall meet UL 900 Class 2
requirements.
2.0 Construction
2.1 The filter pack shall be 2.1” (53 mm) thick and
shall consist of moisture-resistant microfine fiber-
glass co taining a water-repellant binder. The
media shall be formed into closely spaced pleats
and stabilized with polyurethane bead separa-
tors.
2.2 The filter pack shall be urethane sealed in a
clearcoat-anodized extruded aluminum frame
3”deep.
2.3 Extruded aluminum media dividers shall be pro-
vided on filters over 36” wide and 24” in height.
2.4 Furnish 0.25” thick x 0.75” wide closed cell
neoprene gaskets on the face flanges when
required.
3.0 Performance
3.1 Particle size efficiency shall be certified to be not
less than 99.99% on 0.30 micron or 99.99% on
0.12 micron. Each filter is scan tested with auto-
mated laser equipment. Filters shall meet the
requirements of IEST RP-1 for Type C or F filters.
3.2 Initial resistance shall not exceed the scheduled
values.
3.3 Filters shall be capable of operating up to 150 fpm
face velocity.
Drawing Notes:
1. Physical Data
Media: Moisture-resistant fiberglass
Filter Construction: 2.1” (53 mm) thick separatorless
minipleat
Filter Frame: Clearcoat-anodized extruded aluminum
Media Divider: Extruded aluminum channel
2. Add 0.25” to the 3” depth for each gasket.
3. Media dividers are furnished on air filters over 36” in
width. Filters over 24” in height are also furnished
with media dividers and media pleats that are paral-
lel to the width.
Performance Data Notes:
1. Filters are scan-tested for leaks after assembly and
are certified to be 99.99% on 0.30 Fm or 99.99% on
.012 Fm particles.Performance meets the require-
ments of IEST RP-1 for Type C or F filters.
2. Dimensional tolerances are +0” -.13”on height and
width, + 0.6” on depth and +.13” on diagonal dimen-
sions.
3. Maximum operating conditions: 200 degrees F, 100%
RH.
4. Filters are designed to UL 900 Class 2 requirements.
5. Gasket location: Suffix D denotes a downstream gas-
ket. Use suffix U for upstream, B for both upstream
and downstream gasketing and N if no gaskets are
required.
Performance Data - Capacities and Dimensions
Particle
Size
Efficiency
99.99% on
0.30 Fm
HW7090 110
Cfm Capacity at
Gross Face Velocity,
fpm
99.99% on
0.12 Fm
AP493-2424*
AP493-2448*
AP591-2424*
AP591-2448*
Clean Filter Resistance (inch
24
24
24
48
24
24
24
48
Model Number
280
560
.35
280
560
.50
360
720
.45
360
720
.65
440
880
.55
440
880
.80
Actual
Dimensions
(inch)
Clean Filter Resistance (inch
H
W
3” depth,
.75” Flange (typical)
*Insert gasket designator: D, U, B or N. See Note 5.
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