Product description
A polypropylene capsule filter is a disposable filtration unit designed for coarse filtration and prefiltration of aqueous process fluids. The capsule integrates filtration media and housing into a sealed device, allowing quick installation without the need for a separate filter housing.
Technical overview
Polypropylene filtration media is commonly used for removal of suspended solids and larger particulate contamination in liquid streams. Capsule filters using polypropylene media are frequently installed as prefilters upstream of finer membrane filtration stages or analytical systems.
The capsule configuration provides a compact, single-use filtration unit that simplifies installation and reduces contamination risks during laboratory or pilot-scale filtration processes.
Operating principle
During operation, the process liquid enters the capsule through the inlet connection and passes through the polypropylene filtration media. The porous structure of the filter media captures suspended particles and solid contaminants according to the selected micron rating.
Filtered liquid exits through the outlet connection while retained particles remain trapped within the filtration structure.
Material options
Typical construction materials include:
- Filter media: Polypropylene
- Support layers: Polypropylene
- Capsule housing: Polypropylene
- Optional filling bell: Polycarbonate
Polypropylene provides broad chemical compatibility for many aqueous solutions and general industrial liquids.
Available micron ratings
Typical pore size options include:
- 0.3 µm
- 0.65 µm
- 1.0 µm
- 2.0 µm
- 3.0 µm
- 5.0 µm
- 7.0 µm
- 10 µm
- 30 µm
These pore sizes make polypropylene capsule filters suitable for clarification and prefiltration stages before finer filtration processes.
Design and construction
Capsule filters integrate filtration media and housing into a single disposable filtration device.
Typical design characteristics include:
- Polypropylene filtration media
- Disposable capsule configuration
- Multiple inlet and outlet connection options
- Available capsule lengths: 1.5", 2.5", 5" and 10"
- Typical filtration area approximately 250–300 cm² depending on capsule size
- Maximum operating pressure approximately 5 bar at 20°C
- Maximum operating temperature approximately 80°C
Capsule length determines filtration area and flow capacity.
Typical applications
- Prefiltration before membrane filtration
- Removal of suspended solids
- Laboratory sample preparation
- Water purification systems
- Process liquid clarification
- Protection filtration for analytical instruments
Key benefits
- Suitable for coarse filtration and prefiltration
- Broad chemical compatibility
- Disposable capsule design simplifies installation
- Multiple micron ratings for different particle removal requirements
- Compact design suitable for laboratory and pilot-scale filtration
- Cost-effective solution for prefiltration stages
Configuration and quotation
To specify a polypropylene capsule filter, the following parameters should be defined:
- Required pore size (micron rating)
- Capsule length (1.5", 2.5", 5" or 10")
- Connection type
- Process liquid type
- Operating pressure and temperature
Providing these parameters allows the capsule filter configuration to be matched to the filtration system.