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String Wound Depth Filter Cartridges
50mm and 60mm string wound depth cartridges in 50 to 80 inch lengths, 0.5 to 100 micron, 80 C, 2.5 bar. Dimensional equivalent to common OEM series.
What The String Wound Depth Does In Your Line
HFSW is a string wound depth filter cartridge with a continuous yarn structure that forms a graded density media pack. It captures particles throughout the depth of the media, reducing the risk of surface blinding. The cartridge is available in 50mm and 60mm outer diameters and lengths from 50 to 80 inches. It is dimensionally equivalent to common OEM series and fits into standard housings without adapters. The core is made of SS304 or SS316L for high strength, and the media is polypropylene or cotton. It is designed for high flow applications where suspended solids must be removed from process water, condensate, or chemical streams.
Category: Depth Filter Cartridges · Industries: Water Treatment And RO Systems Oil And Gas Operations
Why Buyers Pick This Element
- Graded density structure captures particles throughout the media depth, not just on the surface
- Continuous yarn construction prevents fiber release during operation or backwash
- SS304 or SS316L core provides high mechanical strength for high pressure service
- Available in 50mm and 60mm outer diameters with lengths from 50 to 80 inches
- Dimensional equivalent to common OEM series so no housing change is needed
- Backwashable design extends filter life in continuous duty applications
Buyers Who Specify This Cartridge
- Plant engineers in power and steel plants needing reliable condensate filtration
- Water treatment operators in desalination and chemical plants specifying depth filters
- Procurement teams replacing OEM string wound cartridges with shorter lead times
- System integrators specifying cost-effective, dimensionally equivalent filters for skids
What It Fixes On The Line
- OEM string wound cartridges have long lead times and high unit cost
- Fiber shedding from poor media construction contaminates downstream systems
- Low core strength causes collapse under high differential pressure
- Surface blinding leads to rapid pressure rise and short filter life
- Lack of backwash capability limits filter reuse and increases operating cost
Construction Detail
- Continuous yarn wound media forms a graded density structure for depth filtration
- No fiber release due to seamless, continuous winding process
- SS304 or SS316L core provides high strength and corrosion resistance
- Polypropylene or cotton media for general industrial and chemical service
- Threaded adapter for secure installation and easy handling
- Backwashable design allows reuse in continuous duty applications
Materials Of Construction
- Polypropylene media wound continuously with no joints or fiber release
- Cotton media for applications requiring higher dirt holding capacity
- SS304 core for general industrial strength and corrosion resistance
- SS316L core for higher corrosion resistance in aggressive chemical or marine environments
- Threaded adapter made of polypropylene or stainless steel for secure fit
String Wound Depth Filter Cartridges Specifications
Every figure below comes from the manufacturer data for this series. Anything not listed here is not published and we will confirm it against your duty before you order.
| Series | HFSW |
|---|---|
| Outer Diameter | 50mm, 60mm |
| Lengths | 50, 60, 70, 80 inch |
| Micron Ratings | 0.5, 1, 3, 5, 10, 20, 30, 50, 70, 100 micron |
| Media | Polypropylene, Cotton |
| Core | SS304, SS316L |
| Max Temperature | 80 C |
| Max Differential Pressure | 2.5 bar |
| Flow Pattern | Inside-out |
| Backwashable | Yes |
| Adapter Type | Threaded |
Where It Is Installed
Power plant condensate water filtration to remove iron oxide and copper particles
Steel plant process water treatment where suspended solids cause scaling or erosion
Desalination pretreatment ahead of RO membranes to protect downstream equipment
Chemical plant feedwater filtration where particulate contamination affects product quality
High flow industrial water systems where long filter life and low pressure drop are required
How This Cartridge Is Built
Media Preparation
Continuous yarn winding to form a graded density media pack
Pack Forming
Core insertion with precise alignment to prevent media shift
Hardware Assembly
Threaded adapter assembly to the cartridge ends
End Cap Bonding
End cap sealing with thermal bonding or mechanical crimping
Configuration
Final inspection for media integrity and core alignment
Inspection And Packing
Individual packaging with protective end caps
Checks Before It Ships
- Dimensional check of outer diameter, length, and adapter thread against order
- Visual inspection of media for gaps, loose yarn, or core misalignment
- Pressure test at 2.5 bar to verify structural integrity
- Core strength verification under tension and bending load
- End cap bond integrity check before packing
What We Can Change For You
- Lengths from 50 to 80 inches to match installed housing
- Micron rating selected from 0.5 to 100 micron based on duty
- Media type chosen from polypropylene or cotton
- Core material selected from SS304 or SS316L
- Threaded adapter configured to match housing inlet and outlet
How It Compares With The Alternatives
| Pleated membrane cartridges | HFSW holds more solids and is backwashable, but has lower absolute rating and is not suitable for fine filtration |
|---|---|
| Melt blown cartridges | HFSW has higher dirt capacity and is backwashable, but melt blown offers tighter micron ratings and better initial efficiency |
| OEM string wound cartridges | Same dimensions and fit at lower landed cost and shorter lead time, without OEM warranty documentation |
| Bag filters | HFSW provides higher pressure drop tolerance and better particle retention, but bag filters are cheaper for coarse duty |
Installing And Running This Cartridge
- Confirm housing bore, adapter type, and cartridge length before ordering
- Install the cartridge with the threaded adapter facing the inlet to ensure correct flow
- Backwash the cartridge after each cycle to extend service life
- Flush the housing before installing a new element to prevent initial load
- Do not exceed 80 C; select SS316L core for aggressive or high temperature service
String Wound Depth Filter Cartridges FAQ
Will HFSW fit my existing housing?
What micron ratings are available?
Can I backwash the cartridge?
What core material should I choose?
How do I write the order code?
Can I get a sample before ordering?
Other Elements Buyers Compare With This One
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PP Melt Blown Sediment Filter Cartridges
PP Melt Blown is a depth filter cartridge with a polypropylene melt blown media pack, an inner core, and thermally bonded end caps.
View SpecificationsReading That Helps You Specify
Melt Blown Compared With String Wound Depth Cartridges
Compare graded density, media migration, dirt holding capacity, and suitable duties for melt blown and string wound depth cartridges. Both handle 80℃ and 100μm
Read GuideHow To Choose A Micron Rating For Cartridge Filters
Absolute versus nominal ratings, choosing from the stage you protect, and why rating drives change-out cost more than unit price.
Read GuideHigh Flow Cartridges Compared With Standard 2.5 Inch Cartridges
Compare element count, footprint, change-out labour, and cost per cycle between 6 inch and 6.5 inch high flow cartridges and traditional 2.5 inch cartridges.
Read GuideSend Us Your Housing Model And Duty
Send the housing model and the code on the element you use today and we will confirm whether String Wound Depth Filter Cartridges is the right match before you order.