LDM 120-HS / LDM 120-LS

Summary

Product identification

DuPont™ Ligasep™ Degasification Modules (Models LDM-120-HS, LDM-120-LS) utilize a proprietary Polymethylpentene (PMP) hollow fiber membrane for efficient gas transfer between a liquid and a gas. These modules are designed for deoxygenation, decarbonation, and gas control of liquids.

Key features include:

• Hollow fiber membrane with a skin layer that reduces water vapor passage.
• Membrane acts as a barrier, preventing mixing and cross-contamination between gas and liquid.
• Provides a stable and efficient contact area for achieving low dissolved gas levels.
• Rapid start-up due to immediate gas transfer.
• Low pressure drop across the module, eliminating the need for a booster pump.
• Inline installation for continuous operation and improved process reliability.

Fiber types:

• "LS" fiber: Typically used for gases with lower solubility in water (e.g., oxygen), where high levels of removal are required.
• "HS" fiber: Designed for more efficient contact between sweep gas and liquid, ideal for gases with high solubility in water (e.g., CO₂, H₂S, NH₃).

Applications:

• Boiler feedwater
• Ultrapure water
• Deionized water

Industries:

• Industrial water treatment
• Power
• Beverage
• Oil & Gas
• Microelectronics
• Pharmaceutical

Operating limits

• Water Flowrate: 5 – 50 m³/h (22 – 220 gpm)
• Temperature Range: 5 – 50°C (41 – 122°F)
• Water Pressure:
  • 5 – 25°C (41 – 77°F): 8 bar (116 psig)
  • 25 – 40°C (77 – 104°F): 6 bar (87 psig)
  • 40 – 50°C (104 – 122°F): 5 bar (72.5 psig)
• Operating Vacuum Level: 10 – 760 mmHg (Torr)

Feed water

• Total Suspended Solids: < 1 ppm
• Total Dissolved Solids: Under saturation limits
• Total Organic Carbon: < 1 ppm
• Oil & Grease: < 0.1 ppm
• Free Chlorine: < 0.1 ppm
• Oxidizer: Not detectable
• pH Range: 1 – 13
• Turbidity: < 0.5 NTU
• SDI₁₅: < 3

Mechanical / hydraulic

• Configuration: External Flow
• Flow Structure: Hollow Fiber Membrane
• Connection Type:
  • Liquid: 3” ANSI B16.5 class 150
  • Gas: 1” ANSI B16.5 class 150
• Physical Properties:
  • Volume (liquid phase): 18 L (4.8 gal)
  • Height (including flanges): 876 mm (34.5 in)
  • Diameter: 315 mm (12.4 in)
  • Weight:
    • Empty: 35 kg (77.2 lb)
    • Full: 52 kg (114.7 lb)
• Materials of Construction:
  • Hollow Fiber Membrane: Polymethylpentene (PMP)
  • Housing: Polypropylene
  • Cap: Polypropylene
  • Pipe: Polypropylene
  • Sealing Resin: Epoxy resin
  • O-ring: EPDM

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data for any project must always match the specific OEM PDF revision used for that project.

Official datasheet (PDF)

Lenntech datasheet mirror