01Liquid & chemistry
Composition, concentration, viscosity and cleaning chemicals.
What it informsYarn, core & wetted material suitability
PP String-Wound Filter Cartridges.
Polypropylene yarn wound around a perforated support core for depth filtration of water and compatible process liquids. Select the nominal grade, core and cartridge dimensions around your process.
- Filter medium
- Polypropylene yarn
- Nominal grades
- 1–100 μm
- Core options
- Polypropylene / stainless steel
- Nominal lengths
- 10 / 20 / 30 / 40 in
PP Yarn & Core Options
Choose the filtration medium and support structure as one wetted assembly.
- Polypropylene yarn
- Cross-wound PP yarn forms a porous wall. Yarn size and winding construction shape the filtration grade and the path through the depth.
- Polypropylene support core
- A polymer core supports the yarn pack and provides collection openings. Include the core when reviewing liquid compatibility and operating conditions.
- Stainless steel support core
- A perforated metal core is an alternative support construction. The PP yarn remains part of the assembly, so a metal core does not turn this into a high-temperature glass fiber or cotton cartridge.
Cartridge Construction
Explore the yarn pack, support core and plain open ends. The cutaway shows the stainless steel core option.
Cross-wound polypropylene
Overlapping yarn courses form the filtration wall. Liquid passes from the outside through the yarn pack toward the central core.
Specifications
Reference options for selecting the grade, support core and installation format.
Media & filtration
| Filter medium | Polypropylene (PP) yarn |
|---|---|
| Construction | Cross-wound depth media on a perforated support core |
| Nominal grade options | 1, 5, 10, 25, 50 and 100 μm |
| Retention basis | Nominal particulate filtration; compare the grade together with its retention efficiency and test method |
| Flow direction | Outside to inside, toward the central collection bore |
Dimensions & installation
| Nominal lengths | 10, 20, 30 and 40 inches |
|---|---|
| Reference outside diameter | 60 mm |
| Bore diameter options | 28 or 30 mm; match the housing center post |
| Support core options | Polypropylene or stainless steel |
| Standard end format | Plain double-open ends (DOE) |
| Other dimensions & end fittings | Define overall length, diameter and end arrangement from the housing or an existing sample |
Operating conditions
| Temperature reference | Up to 60°C for the PP-yarn construction, subject to liquid and assembly suitability |
|---|---|
| Differential pressure | Select the allowable limit for the yarn pack, core, temperature and housing support |
| Required flow | Size length and element quantity using clean-element pressure drop and the actual liquid viscosity |
| Wetted materials | Review PP yarn, the selected core and any housing seals against liquid chemistry and cleaning conditions |
Flow & Differential Pressure Curves
Compare nominal grades under the same reference conditions.
Differential pressure (bar)
View curve data
| Flow rate (L/min) | Differential pressure (bar) |
|---|---|
| 0 | 0 |
| 3 | 0.037 |
| 6 | 0.076 |
| 9 | 0.118 |
| 12 | 0.161 |
| 15 | 0.207 |
| 18 | 0.255 |
| Flow rate (L/min) | Differential pressure (bar) |
|---|---|
| 0 | 0 |
| 3 | 0.022 |
| 6 | 0.045 |
| 9 | 0.07 |
| 12 | 0.096 |
| 15 | 0.123 |
| 18 | 0.152 |
| Flow rate (L/min) | Differential pressure (bar) |
|---|---|
| 0 | 0 |
| 3 | 0.013 |
| 6 | 0.026 |
| 9 | 0.04 |
| 12 | 0.055 |
| 15 | 0.071 |
| 18 | 0.088 |
Dimensions & Housing Fit
Compare actual dimensions and both end faces with the existing cartridge and housing.
L is the overall installed length, D the outside diameter and d the bore diameter. Plain double-open ends require the matching housing seat and compression arrangement. Share a drawing or sample when matching an existing installation.
Selection Guide
Four details connect the filtration task with the cartridge configuration.
02Particles & target
Particle size, loading and requirements of the next process stage.
What it informsNominal grade & retention basis
03Operating conditions
Required flow, temperature, pressure and continuous or batch operation.
What it informsLength, element quantity & core support
04Housing & installation
Actual length, outer and bore diameters, end faces and housing photographs.
What it informsInstalled fit & end seating
Applications
Particulate filtration tasks where the PP yarn, core and installation fit are selected together.
Water & RO Pretreatment
Suspended-particle removal within a wider pretreatment train ahead of downstream membranes.
Process Liquid Prefiltration
Reduce particulate loading in compatible process liquids before finer filtration or equipment.
Cleaning & Rinse Liquids
Particle control in compatible cleaning and rinse fluids before reuse or the next stage.
Frequently Asked Questions
Your liquid. A clearer specification.
Share the liquid, particle-removal target and existing housing details. We can work through the PP yarn grade, core and cartridge dimensions together.
Discuss this productPP String-Wound Filter Cartridges
- Liquid & particle loading
- Nominal grade & required flow
- Temperature & core material
- Dimensions & housing fit
