Hongtek Filtration Co., Ltd.

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SFB series Standard Felt Liquid Filter Bags
  • SFB series Standard Felt Liquid Filter Bags
  • SFB series Standard Felt Liquid Filter Bags
  • SFB series Standard Felt Liquid Filter Bags

SFB series Standard Felt Liquid Filter Bags

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Product Description


SFB Series Standard Felt Liquid Filter Bags are made of high-quality polypropylene, polyester & Nomexfelt materials which provide consistent performance of liquid filtration in various of critical industries. Standard felt liquid filter bags offer efficient depth filtering at increased flow rates, and the glazed outer as well as the plain inner finish are to reduce fiber migration and enhance filtration performance. The collars and top rings of felt liquid filter bags ensure general compatibility with most of commercial bag filter housings in processing. Sewing or welded connection of polypropylene, polyester or Nomex makes the liquid filter bags suitable for different housings and purposes. Felt filter bags extend life time without media migration or bypass. Customized felt liquid filter bags are accepted for different requests in many industrial fields.

Filter Media Polypropylene Felt, Polyester Felt, Nomex Felt
Bag Dimensions Size 1: Ø7"×16.5"
Size 2: Ø7"× 32"
Size 3: Ø4"× 8"
Size 4: Ø4"× 14"
Filtration Rating 1, 5, 10, 25, 50, 75, 100, 150, 200, 300μm
Ring Style Galvanized Steel O-Ring, Plastic Ring, S.S. O-Ring
Seam Welded, Sewing, Welded top & Sewing Bottom, Sewing top & Welded Bottom

Electronics Pre RO Filtration Coatings
Oil Refinery Food & Beverage Paints and Inks
Petrochemical Process Chemicals & Solvents Waste Water Treatment


Operation Data for Standard Felt Liquid Filter Bags

Filter Media Polypropylene Felt Polyester Felt Nomex Felt
Abrasion & Flex Good Good Excellent
Weak Acid Excellent Good Excellent
Strong Acid Excellent Good Excellent
Weak Alkali Excellent Good Excellent
Strong Alkali Excellent Poor Excellent
Solvents Fair Good Good
Maximum Operating Temperature 70℃(160℉) 160℃(320℉) 250℃(500℉)
Maximum Differential Pressure 1.8 bar (26.1 psi)
Recommended Change Out Differential Pressure 1.03 bar (15 psi)

Pressure Drop vs Flow Rate of Standard Felt Liquid Filter Bags


Tech Support
Working Principle of Standard Felt Liquid Filter Bags

● The drawing is the working principle of standard felt liquid filter bags

● Dirty fluid flow through the plain inner finish layer and large particle block in surface

● Felt filter media traps contaminants within its depth, no sliding sideways during processing

● Clean fluid come out from glazed layer, high filtration efficiency and long service life with low cost

Oder Information
SFB Filter Media Bag Dimensions Filtration Rating Ring Style Seam

SFB Series

Standard Felt Liquid Filter Bags

P = Polypropylene Felt 1 = Size 1: Ø7"×16.5" 1 = 1 μm G = Galvanized Steel O-Ring W = Fully Welded
5 = 5 μm
10 = 10 μm
E = Polyester Felt 2 = Size 2: Ø7"× 32" 25 = 25 μm S = Plastic Ring F = Fully Sewing
50 = 50 μm
75 = 75 μm
N = Nomex Felt 3 = Size 3: Ø4"× 8" 100 = 100 μm Q = Welded Top & Sewing Bottom
150 = 150 μm U = S.S. O-Ring
4 = Size 4: Ø4"× 14" 200 = 200 μm T = Sewing Top & Welded Bottom
300 = 300 μm

For Example:


SFB Series Standard Felt Liquid Filter Bags - Polypropylene Felt - Size 1: Ø7"×16.5" - 5 μm - Plastic Ring - Fully Welded

Special specifications Standard Felt Liquid Filter Bags can be customized, such as special bag dimensions, ring style and seam etc.

Product Image

SFB series Standard Felt Liquid Filter BagsSFB series Standard Felt Liquid Filter BagsSFB series Standard Felt Liquid Filter Bags
Company Profile

Business Info (公司经营范围)

Business Range: Industrial Equipment & Components , Manufacturing & Processing Machinery

Management Certification: ISO 9001

Main Products: High Flow Filter Cartridges, High Flow Pleated Filters, PP Melt Blown Filters, Water Filter Cartridges, High Flow Filters, Pleated Filter Cartridges, Carbon Block Filters, String Wound Filters, Water Filter Bags, Filter Housings




Hongtek brand concept: Make Better Filtration! 


Hongtek Filtration Co., Ltd. is famous for high-tech filtration, separation and purification, committed to provide high quality filtration solution to meet worldwide customers various needs with good service, struggle for health, safety and environment friendly sustainable development. 

Since 2000, Hongtek specialize in better filtration solution, supply good quality high flow water filters & housings to a diverse range of customers in water treatment, food & beverage, electronics, oil & chemicals, petrochemical, sea water desalination, power generation industry etc. We are always committed to create more value for customers and engage in win-win business. 

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