Varafine VFTR Filter Cartridges

Summary

Product Identification

The VARAFINE™ VFTR Series filter cartridges are designed for critical filtration of solvents and aggressive liquids.

Key features:

• Chemically Resistant PTFE Media
• Absolute Construction
• Uniform Pore Size Throughout Membrane for High Contaminant Retention Capacity and Flow Rates
• Biologically Inert Media
• Pre-Flushed with 18 Megohm-cm Water to Ensure Fast Rinse-Up
• Engineered Polymer Components for Enhanced Resistance and Purity
• Optional Pre-Wetting in Low TOC, Ultra High Purity DI Water for Quick Rinse-Up

Performance Specifications

• Filter Grades (>99.9% Retention Rating by Standard Latex Bead Challenge): 0.05, 0.1, 0.2, 0.45, or 1.0 µm

Operating Limits

• Maximum Differential Pressure:
  • 80 psid (5.5 bar) @ 68°F (20°C)
  • 20 psid (1.4 bar) @ 203°F (95°C)
• Recommended Changeout Differential Pressure*: 35 psid (2.4 bar)
  • *Provided that the maximum differential pressure is not exceeded based on temperature limits defined above.
• Sterilization: Cartridge can be autoclaved at 274˚F (134˚C) for 1 hour.

Mechanical / Hydraulic

• Materials of Construction:
  • Filter Media: PTFE (polytetrafluoroethylene)
  • Support Material: Polypropylene
  • Hardware: Polypropylene
  • Gaskets/O-rings: Viton® A (standard), Silicone Elastomer, Expanded PTFE, White Silicone, FEP Encapsulated Silicone, EPDM, FEP Encapsulated Viton® A
• Dimensions (nominal):
  • Outside Diameter: 2.6" (6.6 cm)
  • Lengths (tip-to-tip): 4" (10.2 cm), 10" (25.4 cm), 20" (50.8 cm), 30" (76.2 cm), 40" (102 cm)
• Flow Rate (1 psid, 10" equivalent, water at 68°F / 20°C):
  • 0.05 µm: 0.9 gpm (3.41 lpm)
  • 0.1 µm: 1 gpm (3.79 lpm)
  • 0.2 µm: 2 gpm (7.57 lpm)
  • 0.45 µm: 2.5 gpm (5.7 lpm)
  • 1.0 µm: 3 gpm (11.36 lpm)
  • Flow rate is per 10" (25.4 cm) cartridge. For liquids other than water, multiply differential pressure by fluid viscosity (cps).
• End Configurations: Available options include various single open end (SOE) and double open end (DOE) configurations to fit different housing types. See the official PDF for specific code details.

Chemical Compatibility

• Cartridge resists most acids and bases, pH 1-14, and most oxidizing agents. Consult factory for specific application information.

Toxicity

• All polypropylene cartridge components meet USP, Class VI (121˚C/250˚F) toxicity criteria (gaskets/O-rings excluded).

Integrity Test

• Bubble Point (in 60/40 Isopropyl alcohol (IPA), DI water):
  • 0.1 µm: 20 psig (1.4 bar)
  • 0.2 µm: 15 psig (1.0 bar)
• Diffusion (in 60/40 Isopropyl alcohol (IPA), DI water):
  • 0.1 µm: ≤30 ml/min @ 15 psig (1.0 bar)
  • 0.2 µm: ≤30 ml/min @ 10 psig (0.7 bar)

Pre-wetting Procedure

PTFE is a naturally hydrophobic media. If filtering a high surface tension solution, it is necessary to prewet by immersing the VFTR cartridge in a mixture of 60% IPA and 40% DI water for five minutes. If an integrity test is required, remove and flow 60% IPA through the cartridge at 1 gpm (3.8 lpm) for five minutes and then proceed with the integrity test.

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Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror