PCP Bag Filter
PP Outer Layers, Cotton Core: Chemical Resistance and Oil Retention Combined
The PCP bag filter is a process-specific three-layer liquid filtration medium that combines the chemical resistance of polypropylene outer layers with the oil absorption of a natural cotton core.
Three-Layer Lamination
0.5–0.8 µm (in high-viscosity liquids)
90 °C
Made to Process Requirements
What Is a PCP Bag Filter?
PCP bag filters are a three-layer liquid filtration medium with a natural cotton core layer between two outer polypropylene layers. The outer polypropylene layers provide chemical resistance and structural stiffness (limited with strong acids because of the cotton core), and stop fibre migration from the cotton core, preventing fibres from getting into the cleaned liquid. The middle cotton layer retains fine particles down to 0.5 µm in depth in dense liquids, while its naturally lipophilic structure also absorbs non-emulsified free oil particles.
PCP keeps the same cotton-core absorption capacity as SCS, but because the outer layer material changes to polypropylene, it works reliably in more chemically demanding processes. PCP bag filters are not a standard product; each is made specifically for the process according to liquid type, viscosity, temperature and chemical profile.
Product Identity and Technical Summary
PCP bag filters are three-layer hybrid depth filters made by laminating two outer polypropylene layers with a natural cotton core in the middle. They offer operating temperatures up to 90 °C; the PP outer layers provide chemical resistance, limited with strong acids because of the cotton core. In addition, the lipophilic structure of the natural cotton core provides particle retention at 0.5–0.8 µm and free oil absorption in high-viscosity, oily liquids. The outer polypropylene layers prevent fibre migration and ensure a clear product output.
Key Technical and Structural Features
- Construction
- Outer Layer: Polypropylene (PP)
- Middle Layer: Natural Cotton Core
- Inner Layer: Polypropylene (PP)
- Outer Layers
- Polypropylene (PP); provides chemical resistance and structural strength and helps prevent fibre migration.
- Middle Layer
- Natural cotton provides high dirt-holding capacity and lipophilic oil absorption.
- Micron Rating
- 0.5–0.8 µm (in dense liquids; may vary with process conditions)
- Filtration Type
- Depth filtration
- Max. Operating Temperature
- 90 °C
- Chemical Resistance
- PP outer layers provide chemical compatibility; limited with strong acids because of the cotton core.
- Recommended Change-Out Pressure
- 2–2.5 bar
- Silicone Content
- Silicone-free construction
- Production Type
- Made to order for each process
PCP Bag Filter Layer Structure
| Layer | Material | Function |
|---|---|---|
| Outer Layer (Inlet Surface) | Polypropylene (PP) | Retains large particles as a pre-stage; provides chemical resistance and structural strength. |
| Middle Layer | Natural Cotton | Retains fine particles down to 0.5 µm in depth in dense liquids; absorbs free oil with its lipophilic structure. |
| Inner Layer (Outlet Surface) | Polypropylene (PP) | Stops fibres that may come loose from the cotton layer from getting into the cleaned liquid and provides chemically resistant structural integrity. |
Advantages of the PCP Bag Filter
- Sub-Micron Particle Retention
- Fine particle retention down to 0.5 µm in dense liquids, a level of precision standard bag filters cannot reach.
- Chemical Resistance Across a Wide pH Range
- The PP outer layers provide chemical resistance (limited with strong acids because of the cotton core); they work more reliably in chemically demanding processes than the spunbond outer layers of SCS.
- Oil Absorption by the Cotton Core
- The lipophilic structure of the cotton middle layer absorbs non-emulsified free oil particles; protected by chemically resistant outer layers, this property stands out in oily processes with chemical content.
- High Structural Stiffness
- The stiffness of the PP outer layers gives the medium dimensional stability, reducing the risk of deformation in high-pressure and high-viscosity applications.
- Fibre Migration Protection
- The PP outer layers stop fibres that may come loose from the cotton core from getting into the cleaned liquid.
- Made to Process Requirements
- Made specifically according to liquid type, viscosity, temperature and chemical profile.
Industry Applications
Bag filters suited to different process needs are used across a wide range of industrial applications to protect product quality, production continuity and system safety.
01
Vegetable Oil
Clarity, purity and shelf life in vegetable oil and refining.
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02
Pipe and Profile
Cooling water filtration in pipe and profile extrusion.
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03
Paint Industry
Surface quality and pigment filtration in the paint industry.
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04
Glass Industry
Furnace and process filtration in the glass industry.
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05
Dialysis Centers
Water preparation and process filtration in dialysis centers.
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06
Foundry Industry
Equipment protection and dust filtration in foundries.
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07
Industrial Oil
Filtration in industrial oil production and recovery.
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08
Energy and Biogas
Maximum efficiency and turbine protection in energy and biogas.
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09
Recycling
Filtration for efficiency and environmental compliance in recycling.
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10
Food and Beverage
Hygienic filtration in food and beverage.
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11
Pharmaceuticals and Biotechnology
GMP-compliant sterile filtration in pharmaceuticals and biotechnology.
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12
Paper and Packaging
Process water filtration in paper and packaging.
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13
Chemical Industry
Corrosion-resistant, safe filtration in the chemical industry.
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14
Cosmetics
Microbiological safety and precision filtration in cosmetics.
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15
Machinery
Precision and technical filtration in the machinery industry.
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16
Printing and Ink
Flawless color and print quality in printing and ink.
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17
Metal and Surface Treatment
Flawless surfaces and bath stability in metal and surface treatment.
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18
Forest Products
Resin and glue filtration in forest products and furniture.
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19
Automotive
Precision process filtration for zero defects in automotive manufacturing.
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20
Oil and Petrochemicals
Equipment protection and process safety in oil and petrochemicals.
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21
Plastic Packaging
Precision process filtration and raw material purity in plastic packaging.
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22
Plastic Injection Molding
Cooling and hydraulic filtration in plastic injection molding.
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23
Water and Environment
Recovery filtration in water and environmental technologies.
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24
Shipyards and Marine
Operational safety and efficiency in shipyards and marine.
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Products that work with this product
PCP Bag Filter
Your Questions Answered
Frequently Asked Questions
At Prosestim, we are committed to answering your questions and providing technical support for our filtration solutions.
What is a PCP bag filter?
How does it differ from SCS and SPS?
Is it a standard stock product?
How does it retain oil?
What is the operating temperature limit?
What is needed for custom production?
Simply contact our technical team with the liquid type, viscosity, operating temperature, chemical content and required filtration precision.
PCP Bag Filter RFQ Configurator
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