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Distinction and Application Analysis of String-Wound, Melt-Blown and Pleated Filter Elements

It is important to make it clear about the different application between PP melt-blown, PP string-wound, and PP membrane pleated filter cartridges, which would largely help you in its water treatment related equipment maintenance.
post_micron grade pleated filter and filter housing

How to do water treatment? UMECO® introduce you a professional water treatment knowledge, the distinction and application analysis between these three sorts of filter cartridges.

PP melt-blown filter

PP melt-blown filter is a filter medium made from non-toxic and tasteless PP particles by heating & melting, spraying, towing and shaping. It has pore-uniformed, deep filtering structure, and with high filtering efficiency, acid and base resisted characteristics. It can effectively remove suspended matters, particles and rusts in liquids.
If it is made from PP particle which is called PP melt-blown filter, of course, there are some other materials for selection, PP melt-blown filter is largely not only used in water purification, but also in other chemical industry thanks for its excellent chemical compatibility, e.g.: strong acid, strong base and organic solvent filtration.

Regular Technical Data

OD63, 115mm
ID28, 30mm
Length5-40 inch
Filter Rating1-100 micron
End CapsDOE 222 226
PH Value1~13
Working Temp.<60℃ @ 0.03Mpa, <90℃ @ 0.02Mpa
Max. Working Differential0.01Mpa / 0.06 Mpa (forward and reverse)

Classical Application

  • Filtration of electroplate liquid, etch solution, pure water in electronic industry.
  • Pre-filtration of various fine filtration.
  • Medicament and solvent filtration in chemical industry.
  • Filtration in brewing and beverage industry.
  • Pre-filtration of RO, UF system, water treatment for industries.

String-Wound Filter

String-wound filter is a deep filtration elements for low viscosity, low impurities liquid filtration, it is made from textile fiber line, mainly polypropylene and cotton wool line, by twining it on PP or SS inner core. It can effectively remove suspended matters, particles and rusts in liquids.

Regular Technical Data

OD63, 115mm
ID28, 30mm
Length10-40 inch
Filter MediaPP, Cotton, glass fiber
Inner CoreSS, PP
Filter Rating1-100 micron
End CapsDOE 222 226
PH Value1~13
Working Temp.Cotton@120°C, Glass fiber@200°C, PP@60°C
Max. Working Drop0.01Mpa / 0.06 Mpa (forward and reverse)

Classical Application

  • Pre-filtration of industry water, municipal tap water and water for food and beverage industry.
  • Pre-filtration of developer, etch solution, plating solution and organic solvent.
  • Cooling circulating water, boiler water supply, ultra-pure water secondary filtration.

Pleated Filtered Elements

PP pleated filter cartridge is made from extra-fine PP fiber membrane, with its stable filter rating, high dirt-hold capacity, large effective filtering area, it can remove micron particles and gel matters, its filtering effectiveness can be as high as 99.8%. for other filtering purpose, the material for making pleated filter cartridge for selection can be: stainless steel screen, sintered screen, PTFE, PES, Nylon, etc.

Regular Technical Data

OD69mm
ID28mm
Length5-40 inch
Filter MediaPP
SkeletonPP
Removal Rating0.1-50 micron
End CapsDOE 222 226 215
PH Value1~13
Working Temp.PP@80℃
Max. Working Differential0.01Mpa / 0.06 Mpa (forward and reverse)

Classical Application

  • Acid-base liquid clarification filtration.
  • Photoresist, developer final filtration.
  • Ink, painting, printing ink, adhesive final filtration.

Melt-blown filters use layered PP fibers for gradient particle removal, ideal for deep filtration. String-wound filters, crafted from wound fibers, excel in high-flow industrial pre-filtration. Pleated filter cartridges maximize its surface filtering area so as to offering superior dirt-holding capacity for precision applications in water treatment field. In this article we will go through what they and how they perform in various industries.

Author: Maxbo
Maxbo, Application Engineer in fluid filtration & separation field, is an industry veteran merging filter element, filter equipment, and filtration solutions together. He takes advantage of mature filtering-related parts supply chain, flexible production system, reliable filtration solution design in China to help global customers perform better in this specific field.

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UMECO® has been committed to customizing a variety of filter element for more than 15 years. Our filter element are mainly used for gas and liquid filtration, which is relevant to many industries like: vehicle, construction machinery, water treatment, chemical, food & beverage, agriculture, etc.
Do not hesitate to reach out to us if you need any help in your field, our Sales Engineers are always available to guide you through your specific needs.
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