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Conventional Sewn Felt Filter Bags

HL Filter offers a wide range of Polyester liquid filter bags designed and constructed to fit an assortment of filter vessels, whether from HL Filter or from another supplier. We manufacture our own felt media for our felt filter bags under 9001:2008 quality systems, resulting in order to order, year to year, reliability and repeatability. Each filter bag is also individually sealed in protective plastic packaging to prevent contamination. Our filter bags are silicone free with sturdy construction and easy installation.

HL Sewn Filter Bags are made out of 100% polypropylene or polyester fibers, ensuring maximum purity and consistent performance. Using silicone-free threads, high-speed industrial sewing machines, and tight and durable sewn filter bag rings, we offer affordable and reliable sewn filter bags.

Quantity:

Materials: Polypropylene, Polyester

Available micron rating range from 0.5-200 µ (for PE, PP)

Continuous operating temperature: PE: 265°F (130°C), PP: 194°F (90°C)

Surface treatments available: signed and/or glazed to reduce the possibility of migration

Resistance to chemicals depends on the materials (please refer to Fiber Characteristics_Liquid Filtration)

Silicone free threads and double stitches for maximum strength

Heavy-duty sewing construction enhancing particle holding capacity

Puncture free overlap side seams provide added strength and improves effluent consistency

Types of ring/side/bottom constructions:  s/s/s fully sewn (w/s/s or s/w/s modifications are available)

Sewing method: five-thread flat lock

Optional covers to eliminate fiber release and migration

All industry-standard #1,2,3,4 & custom sizes available 

Standard or reserving binding

OEM replacement ring styles

Standard Needle Punched Felt Samples
Standard Needle Felt, Polypropylene (PP)
Part Number Micron Rating
Weight
oz/yd²±5% (g/m2±5%)
Thickness
   In±0.004 (mm±0.1)

Air Permeability
 CFM @ ½" W.G 125PA ±25%
(L/dm2min @ 200PA ±25%)
Tensile Strength
 lb/in±25 (N/5CM±25%)
Max. Operating Temperature Continuous/Surge oF (oC)
Warp MD Weft CD
PP-01 1 14.01 (475) 0.106 (2.7) 32(156) 69 (600) 91 (800) 194/230 (90/110)
PP-05 5 13.17 (450) 0.095(2.4) 55(270) 57 (500) 69 (600) 194/230 (90/110)
PP-10 10 10.91 (370) 0.091(2.3) 80(390) 57 (500) 69 (600) 194/230 (90/110)
PP-25 25 10.62 (360) 0.091(2.3) 123(600) 57 (500) 69 (600) 194/230 (90/110)
PP-50 50 10.32 (350) 0.091(2.3) 160(780) 57 (500) 69 (600) 194/230 (90/110)
PP-75 75 10.32 (350) 0.091(2.3) 172(840) 57 (500) 69 (600) 194/230 (90/110)
PP-100 100 9.73 (330 0.091(2.3) 252(1230) 46 (400) 57 (500) 194/230 (90/110)
PP-150 150 9.73 (330 0.091(2.3) 283(1380) 46 (400) 57 (500) 194/230 (90/110)
PP-200 200 9.44 (320) 0.091(2.3) 320(1560) 69 (600) 103 (900) 194/230 (90/110)
Standard Needle Felt, Polyester (PE)
Part Number Micron Rating Weight
oz/yd²±5% (g/m2±5%)
  Thickness Inch±20%  (mm±20%) Air Permeability
 CFM @ ½" W.G 125PA ±25%
(L/dm2min @ 200PA ±25%)
Tensile Strength
 lb/in±25 (N/5CM±25%)

Max. Operating Temperature Continuous/Surge oF (oC)





Warp MD Weft CD
PE-01 1 14.01 (475) 0.075 (1.9) 32(156) 114 (1000) 148 (1300) 265/302 (130/150) 
PE-05 5 10.62 (360) 0.091 (2.3) 61(300) 57 (500) 114 (1000) 265/302 (130/150) 
PE-10 10 10.62 (360) 0.087 (2.2) 82(400) 57 (500) 103 (900) 265/302 (130/150) 
PE-25 25 10.62 (360) 0.095 (2.4) 123(600) 57 (500) 103 (900) 265/302 (130/150) 
PE-50 50 10.62 (360) 0.102 (2.6) 164(800) 57 (500) 103 (900) 265/302 (130/150) 
PE-75 75 10.62 (360) 0.098 (2.5) 184(900) 46 (400) 91 (800) 265/302 (130/150) 
PE-100 100 10.62 (360) 0.114 (2.9) 205(1000) 46 (400) 91 (800) 265/302 (130/150) 
PE-150 150 10.62 (360) 0.122 (3.1) 266(1300) 46 (400) 80 (700) 265/302 (130/150) 
PE-200 200 10.62 (360) 0.126 (3.2) 307(1500) 46 (400) 74 (650) 265/302 (130/150) 
Further technical data, modified surface treatments, and other micron ratings are available on request

Self-supported felts are standard. Scrim-supported felts are available on request



General Chemical

Produced Water from Gas Drilling

Process Water

Food and Beverage

Paints and Coatings

Custom OEM Applications

How to order a felt filter bag




1) Material 2) Micron Rating 3) Finish 4) Size 5) Ring 6) Ring/side/bottom Construction
PE-Felt, Polyester PE:0.5-200 PL-Plain  #1 S- Carbon Steel 
PP-Felt, Polypropylene PP:0.5-200 SO-Singed One Side #2 SS-Stainless Steel SSS- Fully Sewn 


SB-Singed Both Side #3 Z- Zinc Galvanized Steel  SWS- Ring Sewn, Side Welded, Bottom Sewn


GL-Glazed #4 P-Polypro PP Flange WSS- Ring Welded, Side Sewn, Bottom Sewn


SG-Singed & Glazed
E-Polyester PE Flange


HS-Heat Set
DS-Draw String


MS-Special/modified
VS-High-temp Plastic Snap-seal 7) Options




PP-Polypro Ring HS-Handle Strap (additional handle, same media)




PE-Polyester Ring A-Automotive (bottom and side seams inside bag)




T-Titanium MC- Mesh Cover




N-No Ring SB-Spunbond cover




MS-Modified/Special SR-Special request












Other micron ratings, other sizes, and special design are available on request




Standard Bag Size #1 #2 #3 #4
Surface Area  2.6 (0.24) 5.2 (0.48) 0.9 (0.08) 1.7 (0.16)
ft2 (m2)
Volume 2.1 (7.9) 4.5 (17.0)
0.7 (2.7)
U.S gal (liter) 0.37 (1.4)
Max. Flow Rate 90 (20) 180 (40) 26 (6) 53 (12)
GPM (m3/h) 
Bag Diameter 7.0 (180) 7.0 (180) 4.0 (105) 4.0 (105)
inch (mm)
Bag Length 17.0/430 32.0/810 9.0/230 15.0/380
Inch (mm)
Other Bag Size Available upon request
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