LDM 040-HS / LDM 040-LS

Summary

Product identification

DuPont™ Ligasep™ Degasification Modules, Models LDM-040-HS and LDM-040-LS, utilize a proprietary Polymethylpentene (PMP) hollow fiber membrane for efficient gas transfer between liquid and gas phases. They are designed for deoxygenation, decarbonation, and general gas control in liquids.

Key features include:

• Hollow fiber membrane with a skin layer to reduce water vapor passage, allowing use of blowers and vacuum pump technologies on the gas side.
• Membrane acts as a barrier to prevent mixing and cross-contamination between fluids.
• Provides a stable and efficient contact area for achieving low dissolved gas levels at the outlet.
• Immediate gas transfer for rapid start-up.
• Low pressure drop across the module, eliminating the need for a booster pump and reducing energy consumption.
• Inline installation for continuous operation and improved process reliability.

The "LS" fiber is typically used for gases with lower solubility in water, such as oxygen, where high removal levels are required. The "HS" fiber is designed for more efficient contact between sweep gas and liquid, ideal for gases with high solubility in water, such as CO₂, H₂S, and NH₃.

Applications:

• Boiler feedwater
• Ultrapure water
• Deionized water

Industries:

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

Mechanical / hydraulic

Configuration:

• Flow Structure: External Flow
• Connection Type:
  • Liquid: 1” ANSI B16.5 class 150
  • Gas: ISO 15A Ferrule

Physical Properties:

• Volume (liquid phase): 6.5 L (1.7 gal)
• Height (including flanges): 673 mm (26.5 in)
• Diameter: 180 mm (7.1 in)
• Weight:
  • Empty: 10 kg (22.1 lb)
  • Full: 16.5 kg (36.4 lb)

Materials of Construction:

• Hollow Fiber Membrane: Polymethylpentene (PMP)
• Housing: PVC
• Cap: Polysulfone
• Pipe: Polysulfone
• Sealing Resin: Epoxy resin, Polyurethane resin
• O-ring: EPDM

Operating limits

Suggested Operating Conditions:

• Water Flowrate: 1 – 11 m³/h (4.4 – 48.4 gpm)
• Temperature Range: 5 – 50°C (41 – 122°F)
• Water Pressure:
  • 5 – 40°C (41 – 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

Feedwater Characteristics:

• 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

Disclaimer This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official PDF datasheet. For contractual data and complete product information, always refer to the specific OEM PDF revision used for your project. DuPont strongly encourages customers to review their processes and applications to ensure products are used as intended and to consult DuPont product literature, including safety data sheets, prior to use.

Official datasheet (PDF)

Lenntech datasheet mirror