Critical-liquid filtration
PSguard® PES membrane cartridge filters
Hydrophilic polyethersulfone membrane configurations for compatible pharmaceutical, bioprocess and laboratory liquids.
Product overview
PSguard combines a hydrophilic PES membrane with polypropylene support and structural components. It is intended for applications requiring fine liquid filtration with configuration-specific performance and documentation. Selection should account for the fluid, retention objective, flow, differential pressure, temperature, sterilization method and validation strategy.
Available configurations
| Filter medium | Hydrophilic polyethersulfone (PES) membrane |
|---|---|
| Available ratings | 0.2 and 0.45 µm |
| Nominal diameter | 2.75 in (7 cm) |
| Nominal lengths | 10, 20, 30 and 40 in (25, 50, 75 and 100 cm) |
| Seal | Silicone; confirm connection and seal configuration |
Materials of construction
| Membrane | Polyethersulfone (PES) |
|---|---|
| Supports, core, outer guard and end caps | Polypropylene |
| Sealing method | Thermal bonding |
Operating limits
| Differential pressure | 80 psi (5.5 bar) at 32–100 °F (0–38 °C); 60 psi (4.1 bar) at 150 °F (66 °C); 30 psi (2.1 bar) at 180 °F (82 °C) |
|---|---|
| Steam-in-place | Saturated steam at 121–125 °C for 30–60 minutes, subject to approved configuration and procedure |
| Autoclave | 121–135 °C for 30–60 minutes, subject to approved configuration and procedure |
Confirm the reinforcement-ring option, integrity-test parameters and permitted sterilization-cycle count for the exact configuration.
Typical application discussions
- Compatible pharmaceutical solutions and process intermediates
- Media, buffer and biological-process liquids
- Diagnostic, protein and laboratory solutions
- Fine filtration before validated downstream processing
Validation and limitations
A pore rating alone does not establish sterilizing-grade performance. Microbial retention, integrity-test values, chemical compatibility, extractables, adsorption and process suitability must be confirmed against current configuration-specific evidence and validated by the user for the intended process.
Selection support
Discuss your PSguard application.
Share the liquid, retention objective, batch or flow requirement, operating conditions, sterilization method and documentation needs.