Product description
A PTFE membrane capsule filter is a compact disposable filtration unit designed for gas, air and solvent filtration in laboratory and industrial environments. The capsule integrates the membrane and housing in a sealed assembly, enabling simple installation without the need for a separate filter housing.
Technical overview
PTFE (polytetrafluoroethylene) membranes are naturally hydrophobic and highly chemically resistant. These properties make PTFE capsule filters suitable for sterile air filtration, tank vent filtration and gas filtration applications where moisture resistance and particle retention are required.
Because the membrane repels water, PTFE filters are frequently used in venting applications where gases must pass while liquid water or aerosols are prevented from entering the system.
Operating principle
During operation, the gas or liquid stream enters the capsule through the inlet connection and flows through the PTFE membrane.
The membrane contains controlled pore structures that retain particles, microorganisms and aerosols according to the selected micron rating, while the filtered gas or liquid exits through the outlet connection.
For gas filtration applications, the hydrophobic membrane allows gas to pass while resisting moisture penetration.
Material options
Typical construction materials include:
- Filter media: PTFE membrane
- Support layers: Polypropylene
- Capsule housing: Polypropylene
- Optional filling bell: Polycarbonate
These materials provide broad chemical compatibility and suitability for gas, air and chemical filtration processes.
Available micron ratings
Typical pore size options include:
- 0.05 µm
- 0.1 µm
- 0.2 µm
- 0.45 µm
- 0.65 µm
The selected micron rating determines the retention level for particles and microorganisms in gas or liquid streams.
Design and construction
Capsule filters are designed as integrated filtration units combining membrane media and housing in a single disposable device.
Typical design characteristics include:
- Hydrophobic PTFE membrane
- Disposable capsule configuration
- Multiple inlet and outlet connection options
- Available capsule lengths: 1.5", 2.5", 5" and 10"
- Typical filtration area around 300 cm²
- Maximum operating pressure approximately 5 bar at 20°C
- Maximum operating temperature approximately 80°C
Capsule length influences filtration area and gas flow capacity.
Typical applications
- Sterile air filtration
- Tank vent filtration
- Gas filtration systems
- Laboratory gas filtration
- Protection of analytical instruments
- Filtration of organic solvents and chemical solutions
Key benefits
- Hydrophobic PTFE membrane for gas and vent filtration
- Resistance to moisture penetration
- Broad chemical compatibility
- Disposable capsule design simplifies installation
- Multiple pore size options for different filtration requirements
- Compact design suitable for laboratory and pilot-scale systems
Configuration and quotation
To specify a PTFE capsule filter, the following parameters should be defined:
- Required pore size (micron rating)
- Capsule length (1.5", 2.5", 5" or 10")
- Connection type
- Gas or liquid type
- Operating pressure and temperature
Providing this information allows the capsule filter configuration to be matched to the filtration system.