Standard Felt Filter Bags

Summary

Product Identification

FSI Standard Felt Filter Bags are designed for applications with higher solid loading in vessel or open filtration systems. They feature FSI's "Comprehensive Manufacturing Control" for consistent performance.

Key characteristics include:

• Available Materials:
  • PO = Felt, Polypropylene
  • PE = Felt, Polyester
  • N = Felt, Nylon
  • HT = Felt, High Temperature
  • TFE = Felt, Teflon
• Construction Options:
  • Conventional sewn bags
  • PolyWeld® welded seam bags (no-bypass, eliminates fluid bypass through needle holes)
  • Reinforcing scrim needled inside for inserted felts (polyester only)
  • Glazed and singed finishes to inhibit fiber migration
• Ring Options:
  • FSI PolyLoc® ring (Polypropylene, Polyester, Nylon)
  • Cuno
  • Snap ring metal (S, SSS - Stainless steel)
  • Commercial (CO - steel, COP - plastic)
  • Ronningen-Petter (RP - snap ring, RPP - plastic ring, RPF - flange)
• Finish/Material properties:
  • N = Non-inserted felt
  • I = Inserted felt (polyester only)
  • G = Glazed finish
  • F = Fuzzy finish (polyester only)
• Seam Construction:
  • WE = Welded Seam Construction (available in sizes 1 and 2, polypropylene and polyester non-inserted only)
  • A = Auto Construction (seam inside bag)
• Handles:
  • C = Cotton Handle
  • N = Nylon Handle
  • LOOPS = Loops

Features

• Full line of felt materials and micron ratings.
• Conventional sewn bags or PolyWeld® welded seam bags available.
• FSI PolyLoc® ring or other common bag rings available on most bags.
• Heavy Duty and Extended Life designs available.
• Extended Life filter bags provide superior filtration and up to twice the dirt holding capacity of a standard filter bag.

Operating Limits

• Maximum Operating Temperature:
  • Polypropylene: 200-220° F (93-104° C)
  • Polyester: 275-325° F (135-162° C)
  • Nylon: 275-300° F (135-149° C)
  • High Temperature: 400-450° F (204-232° C)
  • Teflon: 450-500° F (232-260° C)
• Suggested Differential Pressure:
  • 35 PSIG maximum — dirty
  • 10-15 PSIG optimum change out

Mechanical / Hydraulic

• Micron Ratings Available by Material:

  • PO: 1, 3, 5, 10, 25, 50, 100
  • PE: 1, 3, 5, 10, 25, 50, 75, 100, 200
  • N: 5, 10, 25, 50, 100
  • HT: 5, 10, 25, 50, 100, 200
  • TFE: 1, 5, 10, 25
  • Other materials like Microfiber and Mesh have varied micron availabilities; see the official PDF for a full matrix.

• Standard Sizes (Diameter x Length):

  • #1: 7” x 16” (17.78 cm x 40.65 cm)
  • #2: 7” x 32” (17.78 cm x 81.28 cm)
  • #3: 4” x 8.25” (10.16 cm x 20.96 cm)
  • #4: 4” x 14” (10.16 cm x 35.56 cm)
  • #5: 6 7/8” x 34” (17.46 cm x 86.36 cm)
  • #6: 6 7/8” x 16 1/2” (17.46 cm x 41.91 cm)
  • #7: 5 1/2” x 16” (13.97 cm x 40.64 cm)
  • #8: 5 1/2” x 22” (13.97 cm x 55.88 cm)
  • #9: 5 1/2” x 33” (13.97 cm x 83.82 cm)
  • Sizes 5, 6 are available with S ring only.

• Filter Bag Data (Bag Size, Diameter, Length, Surface Area, Volume):

  • Bag Size 1: Diameter 7.0"/17.8 cm, Length 16"/40.65 cm, Surface Area 2.0 ft²/0.19 m², Volume 2.1 gal*/7.9 liter.
  • Bag Size 2: Diameter 7.0"/17.8 cm, Length 32.0"/81.3 cm, Surface Area 4.4 ft²/0.41 m², Volume 4.6 gal*/17.3 liter.
  • Bag Size 3: Diameter 4.0"/10.2 cm, Length 8.25"/20.9 cm, Surface Area 0.5 ft²/0.05 m², Volume 0.37 gal*/1.4 liter.
  • Bag Size 4: Diameter 4.0"/10.2 cm, Length 14.0"/35.5 cm, Surface Area 1.0 ft²/0.9 m², Volume 0.67 gal*/2.5 liter.
  • Bag Size X01: Diameter 6.0"/15.2 cm, Length 22"/55.9 cm, Surface Area 2.0 ft²/0.19 m², Volume 2.1 gal*/7.9 liter.
  • Bag Size XL: Diameter 9.25"/23.5 cm, Length 32"/81.3 cm, Surface Area 5.3 ft²/0.49 m², Volume 5.5 gal*/0.51 liter.

• FSI Filter Vessel Model Number Compatibility:

  • Bag Size 1: FSPN-40
  • Bag Size 2: CBFP-11 and all multi-hole vessels
  • Bag Size 3: FSPN-20, BFN-13
  • Bag Size 4: FSPN-35, BFN-14
  • Bag Size X01: FSPN-85, X100B
  • Bag Size XL: FSPN-250, CBFP-12, XL234

• Typical Flow Rates (for #2 BAG):

  • Felt, 1 & 3 Micron: 80 GPM
  • Felt, 5 THRU 200 Micron: 120 GPM
  • Mesh, 1, 3, 5 & 100 Micron: 100 GPM
  • Mesh, 25 THRU 100 Micron: 125 GPM
  • Mesh, 150 THRU 800 Micron: 150 GPM
  • Microfiber, 1A and 2A: 60 GPM
  • Microfiber, 10A, 25A, 90A & 0A: 80 GPM

Material Properties (Filter Fabric Qualities)

See the official PDF for exact tabulated values for Specific Gravity and Tensile Strength. A qualitative comparison of properties is provided below:

• Cotton: Poor weak acids, poor strong acids, excellent weak alkali, excellent strong alkali, good solvents. Temperature 200-240°F.
• Polyester: Very good abrasion & flex, very good weak acids, good strong acids, good weak alkali, poor strong alkali, good solvents. Temperature 275-325°F.
• Glass: Poor abrasion & flex, excellent weak acids, good strong acids, fair weak alkali, poor strong alkali, excellent solvents. Temperature 500-600°F.
• Nylon: Excellent abrasion & flex, fair weak acids, poor strong acids, excellent weak alkali, excellent strong alkali, good solvents. Temperature 275-300°F.
• Nomex: Very good abrasion & flex, fair weak acids, poor strong acids, excellent weak alkali, excellent strong alkali, good solvents. Temperature 400-450°F.
• Polypropylene: Very good abrasion & flex, excellent weak acids, excellent strong acids, excellent weak alkali, excellent strong alkali, fair solvents. Temperature 200-220°F.

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Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions. For contractual data, please refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror