Flanders Flanders FB1100-0606 Manuel utilisateur

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Precision Pak

General

Precision Pak extended surface bag filters are

designed for use in most commercial or industrial

HVAC systems where medium to high efficiency fil-

tration is required. Precision Pak filters are available

in two media types: lofted fiberglass and micro-fine

synthetic media with average efficiency ranges of

55%, 65%, 85%, and 95% per ASHRAE Standard

52.1 test methods. Offered MERV 10-15 according

to ASHRAE Std. 52.2. Operating face velocities up

to 625 fpm are available for all models. Precision

Pak filters in depths up to 22" are suited for variable

air volume systems. Filters with greater depth are

not recommended.

Precision Pak filters are UL 900 Class 2 listed as a

standard and are also available in UL Class I in both

synthetic and glass media.

Installation Considerations

Precision Pak bag filters may be installed in

Flanders Astr Frames, K-Trac Filter Framing

Modules, Sureseal Side Access Housings, or in

similar existing hardware.

Astr Frames are riveted together to form a bank

and may be installed for upstream or downstream

service. K-Trac Filter Framing Modules are

especially suitable for medium to large built-up filter

banks. Smaller systems and systems with minimum

upstream access space are best served using

Sureseal Side Access Housings.

Physical Data

Media: Lofted fiberglass or micro-fine synthetic

Media Backer: Non-woven polyester

Pocket Sealant: Thermoplastic resin

Pocket Retainer: Corrosion-resistant steel

Header: 13/16" wide corrosion-resistant steel

Operating Limits: 100% RH and 180° F

Actual Header Face Size: Nominal size less

5/8" (e.g., a nominal 24" x 24" filter header is

actually 23-3/8" x 23-3/8")

Important Features

• Low initial pressure drop provides longer life.

• Stitched pockets provide aerodynamics for

optimal inflation.

• Wide range of cartridge depths, efficiencies

and operating capacities are available.

• Edges have an over lock stitch.

• Available in lofted fiberglass or synthetic

media.

• 100% stake-through pocket retainers.

• UL 900 Class 1 or 2 available.

• MERV 10-15.

Spun Glass or Synthetic Media Bag Filters

Bulletin PB1100-0606

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15 12 24 24 65 1500 0.40 2000 0.55 2500 0.75

15 6 12 24 33 750 0.40 1000 0.55 1250 0.75

22 6 24 24 48 1500 0.42 2000 0.60 2500 0.79

22 3 12 24 24 750 0.42 1000 0.60 1250 0.79

22 8 24 24 64 1500 0.36 2000 0.51 2500 0.67

22 4 12 24 32 750 0.36 1000 0.51 1250 0.67

22 10 24 24 79 1500 0.34 2000 0.48 2500 0.64

22 5 12 24 40 750 0.34 1000 0.48 1250 0.64

30 6 24 24 65 1500 0.36 2000 0.52 2500 0.73

30 3 12 24 33 750 0.36 1000 0.52 1250 0.73

30 8 24 24 87 1500 0.25 2000 0.37 2500 0.52

30 4 12 24 43 750 0.25 1000 0.37 1250 0.52

30 10 24 24 108 1500 0.24 2000 0.35 2500 0.49

30 5 12 24 54 750 0.24 1000 0.35 1250 0.49

36 6 24 24 78 1500 0.32 2000 0.47 2500 0.66

36 3 12 24 39 750 0.32 1000 0.47 1250 0.66

36 8 24 24 104 1500 0.23 2000 0.33 2500 0.47

36 4 12 24 52 750 0.23 1000 0.33 1250 0.47

Nominal

Depth

(Inches)

Number

Pockets

Nom.

Width

(inch)

375 FPM 500 FPM 625 FPM

cfm PD cfm PD cfm PD

Nom

Height

(inch)

Media

Area

(sq. ft)

15 12 24 24 65 1500 0.30 2000 0.44 2500 0.59

15 6 12 24 33 750 0.30 1000 0.44 1250 0.59

22 6 24 24 48 1500 0.32 2000 0.47 2500 0.63

22 3 12 24 24 750 0.32 1000 0.47 1250 0.63

22 8 24 24 64 1500 0.24 2000 0.36 2500 0.51

22 4 12 24 32 750 0.24 1000 0.36 1250 0.51

22 10 24 24 79 1500 0.22 2000 0.34 2500 0.48

22 5 12 24 40 750 0.22 1000 0.34 1250 0.48

30 6 24 24 65 1500 0.30 2000 0.42 2500 0.57

30 3 12 24 33 750 0.30 1000 0.42 1250 0.57

30 8 24 24 87 1500 0.22 2000 0.33 2500 0.46

30 4 12 24 43 750 0.22 1000 0.33 1250 0.46

30 10 24 24 108 1500 0.20 2000 0.31 2500 0.43

30 5 12 24 54 750 0.20 1000 0.31 1250 0.43

36 6 24 24 78 1500 0.27 2000 0.38 2500 0.51

36 3 12 24 39 750 0.27 1000 0.38 1250 0.51

36 8 24 24 104 1500 0.20 2000 0.30 2500 0.41

36 4 12 24 52 750 0.20 1000 0.30 1250 0.41

Nominal

Depth

(Inches)

Number

Pockets

Nom.

Width

(inch)

375 FPM 500 FPM 625 FPM

cfm PD cfm PD cfm PD

Nom

Height

(inch)

Media

Area

(sq. ft)

95% Synthetic Media MERV 15

85% Synthetic Media MERV 13

How to Select a Precision Pak Filter

• Determine the ASHRAE efficiency desired.

• Determine the face velocity needed to fit the system.

• Select the shortest depth possible with a pressure drop that is acceptable.

• Select the most economical filter based on the number of pockets per 24" x 24" size.

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Notes:

1. PD represents clean pressure drop in inches w.g. for synthetic media filters.

2. The recommended final pressure drop for all models is 1.0 inch w.g.

3. Gross media area is approximately 7% more than the net area listed.

4. Values shown may be averages or estimates typical of products styles.

Contact factory for test data on specific models.

15 12 24 24 65 1500 0.18 2000 0.28 2500 0.35

15 6 12 24 33 750 0.18 1000 0.28 1250 0.35

22 6 24 24 48 1500 0.19 2000 0.30 2500 0.37

22 3 12 24 24 750 0.19 1000 0.30 1250 0.37

22 8 24 24 64 1500 0.16 2000 0.25 2500 0.33

22 4 12 24 32 750 0.16 1000 0.25 1250 0.33

22 10 24 24 79 1500 0.15 2000 0.24 2500 0.31

22 5 12 24 40 750 0.15 1000 0.24 1250 0.31

30 6 24 24 65 1500 0.16 2000 0.26 2500 0.35

30 3 12 24 33 750 0.16 1000 0.26 1250 0.35

30 8 24 24 87 1500 0.14 2000 0.21 2500 0.31

30 4 12 24 43 750 0.14 1000 0.21 1250 0.31

30 10 24 24 108 1500 0.14 2000 0.20 2500 0.29

30 5 12 24 54 750 0.14 1000 0.20 1250 0.29

36 6 24 24 78 1500 0.15 2000 0.24 2500 0.32

36 3 12 24 39 750 0.15 1000 0.24 1250 0.32

36 8 24 24 104 1500 0.14 2000 0.20 2500 0.29

36 4 12 24 52 750 0.14 1000 0.20 1250 0.29

Nominal

Depth

(Inches)

Number

Pockets

Nom.

Width

(inch)

375 FPM 500 FPM 625 FPM

cfm PD cfm PD cfm PD

Nom

Height

(inch)

Media

Area

(sq. ft)

60-65% Synthetic Media MERV 11

50-55% Synthetic Media MERV 10

15 12 24 24 65 1500 0.18 2000 0.28 2500 0.39

15 6 12 24 33 750 0.18 1000 0.28 1250 0.39

22 6 24 24 48 1500 0.19 2000 0.30 2500 0.41

22 3 12 24 24 750 0.19 1000 0.30 1250 0.41

22 8 24 24 64 1500 0.16 2000 0.25 2500 0.37

22 4 12 24 32 750 0.16 1000 0.25 1250 0.37

22 10 24 24 79 1500 0.15 2000 0.24 2500 0.34

22 5 12 24 40 750 0.15 1000 0.24 1250 0.34

30 6 24 24 65 1500 0.18 2000 0.29 2500 0.39

30 3 12 24 33 750 0.18 1000 0.29 1250 0.39

30 8 24 24 87 1500 0.15 2000 0.23 2500 0.34

30 4 12 24 43 750 0.15 1000 0.23 1250 0.34

30 10 24 24 108 1500 0.14 2000 0.22 2500 0.32

30 5 12 24 54 750 0.14 1000 0.22 1250 0.32

36 6 24 24 78 1500 0.18 2000 0.26 2500 0.36

36 3 12 24 39 750 0.18 1000 0.26 1250 0.36

36 8 24 24 104 1500 0.14 2000 0.22 2500 0.31

36 4 12 24 52 750 0.14 1000 0.22 1250 0.31

Nominal

Depth

(Inches)

Number

Pockets

Nom.

Width

(inch)

375 FPM 500 FPM 625 FPM

cfm PD cfm PD cfm PD

Nom

Height

(inch)

Media

Area

(sq. ft)

Flanders PrecisionAire ~ Foremost in Air Filtration

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1.0 General

1.1 Medium and high efficiency self-supporting filters

shall be Precision Pak extended surface type as

manufactured by Flanders.

1.2 Filter sizes, efficiencies and capacities shall

be as scheduled on the drawings.

2.0 Filter Construction

2.1 Filters shall be constructed of lofted fiberglass

or micro-fine synthetic media encased in a

thin non-woven polyester backer mat.

2.2 Open area on the filter face for air passage

shall

be not less than 90%.

2.3 Flexible internal support stitching shall maintain

individual pockets in a controlled form under all rated

air flow conditions. Stitching shall be sealed with

thermoplastic sealant. Edges shall be finished with

over lock stitch to prevent air

unraveling.

2.4 Pockets shall be 100% stake-through

crimped to prevent media pullout.

2.5 Pockets shall be bonded to corrosion-

resistant steel casings and assembled into a

corrosion-resistant steel header.

2.6 Filters shall be UL 900 Class 2 or Class 1

listed.

3.0 Performance

3.1 Initial and final resistances shall not exceed the

scheduled values.

3.2 Media area must equal or exceed that of the

specified filter.

3.3 The average efficiency shall be as determined

3.4 The manufacturer shall guarantee

performance as stated in its literature within

tolerances as out-

lined is Section 7.4 of ARI

Standard 850.

Guide Specifications

Application Guidelines

Precision Pak filters should be

installed with pockets vertical

wherever possible. It is acceptable

to install 24" x 12" face size filters

with pockets horizontal if necessary

to meet the size requirements of

the filter banks.

Gasketed Headers

Precision Pak filters installed in

Flanders K-Trac Filter Framing

Modules or Sureseal Side Access

Housings require polyfoam gaskets

on opposite header sides to

prevent air bypass. To specify

Precision Pak filters with gasketed headers, add suffix “SA” (side access), “GU” (upstream), “GD” (downstream)

and “GS” (sides) to the model number.

Prefilters

Properly selected bag filters without prefilters will generally require change out annually in typical HVAC

applications. Because of the frequent maintenance expense and increase in fan kW input using prefilters,

they are often recommended with 85% and 95% efficient Precision Pak final filters. However, the energy

cost to operate a prefilter seldom warrants their use with 55% or 65% filters.

by the ASHRAE Standard 52.1 and 5.22 test

methods.

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