Product Details

OptiFluor SLF-T Cartridge

SLF-T - Hydrophobic PTFE Membrane Cartridge

Brand OptiFluor
Media: Gases
Micron Ratings: 0.2 µm
Filter Type: Pleated Membrane

Masterfilter SLF-T filter cartridges manufactured with permanently hydrophobic PTFE membranes are designed for sterile filtration of air and gas. Due to their permanent hydrophobicity, SLF-T cartridges offer high process security, with high volume gas streams and can withstand high differential pressures and stringent in-line steam sterilisations.

Features Benefits

  • 0.2 µm rated (0.01 µm for gases)
  • Pleated surface provides excellent flow rate and long service life
  • Permanently hydrophobic PTFE for maximum security with wet and dry gas
  • PTFE offers compatibility with most chemicals
  • Suitable for all integrity test procedure incl. WIT


  • Pharmaceuticals and Biologicals
  • Food and Beverage
  • Chemicals

Technical Specification

Materials of construction
Membrane: Hydrophobic PTFE
Support layers: Polypropylene
Inner core: Polypropylene
Outer cage: Polypropylene
End caps: Polypropylene
End cap insert: PBT
O-Rings: EPDM, Silicone

Operating parameters
Max. differential pressure forward: 6.9 bar at 25 °C, 2.4 bar at 85 °C
Max. differential pressure reverse: 3.0 bar at 25 °C, 1.0 bar at 80 °C
In situ steam sterilisation: for 30 min at 145 °C (< 0.3 bar) up to 100 cycles 
Autoclaving: 134°C for 30min
Max. continuous air inlet temperature: 60 °C
Surface area 10”: 0.85 m²


  • Fermentation
  • LVP (Large Volume Parenterals)
  • SVP (Small Volume Parenterals)
  • Pharmaceutical Water Treatment
  • Ophthalmics
  • API (Active Pharmaceutical Ingridients)
  • Brewing
  • Wine
  • Distilled Spirits
  • Bottled Water
  • Soft Drinks
  • Raw Materials Clarification
  • Raw Materials Intermediate Polishing
  • Final Product Filtration

Filter Properties

  • Cartridges produced in a controlled environment
  • Manufactured under ISO 9001:2015 certified quality management system and cGMP
  • Comply with the relevant requirements of EU 1935/2004 and EU directive 10/2011
  • Comply with USP Plastics Class VI-121 °C and ISO10993 equivalents