3M Liqui-Cel EXF-4×13 Membrane Contactor

Overview

3M Liqui-Cel EXF-4×13 is a hollow fiber membrane contactor engineered for non-contact dissolved gas transfer in liquid streams – primarily CO2 and O2 removal, and N2/CO2 addition, in ultrapure water, boiler feedwater, RO permeate, power plant condensate, and semiconductor process water systems. Built around 3M’s proprietary microporous polypropylene hollow fiber membrane in an Extra-Flow cartridge configuration with a center baffle, the EXF-4×13 forces liquid to flow perpendicular to the fiber bundle rather than parallel to it, dramatically increasing mass transfer efficiency versus older parallel-flow contactor designs. The result is a compact, skid-mountable degassing module capable of driving dissolved oxygen or free CO2 down to trace levels without ever letting the liquid phase physically touch the stripping gas or vacuum source.

As the official authorized partner and exclusive regional representative for 3M separation and purification products, Seven Star LLC proudly supplies the Liqui-Cel EXF-4×13 membrane contactor to water treatment integrators, power generation plants, and semiconductor and pharmaceutical facilities across Oman and the wider GCC. Engineers in Muscat, Sohar, and Salalah rely on Seven Star LLC for genuine 3M Liqui-Cel cartridges, correct membrane and seal selection for their specific gas transfer duty, and full technical backing from initial system sizing through commissioning and ongoing replacement cartridge supply.

Operating Principle of the 3M Liqui-Cel EXF-4×13

The EXF-4×13 contactor houses thousands of microporous hollow fiber membranes potted at each end of a cylindrical polypropylene or 316L stainless steel shell. Process liquid is introduced on the shellside and flows radially across the fiber bundle, while a stripping gas, sweep gas, or vacuum is applied to the lumenside (fiber bore) of the membrane. Because the membrane pores are hydrophobic and sized in the sub-micron range, liquid cannot pass through them under normal operating pressures, yet dissolved gas molecules diffuse freely across the gas-liquid interface formed at each pore. This creates an enormous, non-dispersive contact area – equivalent to hundreds of square meters of interfacial surface packed into a housing roughly 512 mm long – without bubbling gas directly through the liquid.

Two membrane chemistries are offered for the 3M Liqui-Cel EXF-4×13 duty: X50 fiber, optimized for free CO2 removal from water, and X40 fiber, recommended for general gas transfer applications including dissolved oxygen stripping and nitrogen or CO2 addition. Because there is no direct gas-liquid contact and no moving parts inside the contactor, the EXF-4×13 introduces zero particulate generation, negligible pressure drop compared to spray or tray-based degasifiers, and no risk of process water re-contamination from ambient air – a critical requirement for ultrapure water loops feeding semiconductor rinse baths or pharmaceutical water-for-injection systems.

Engineering Design of the 3M Liqui-Cel EXF-4×13

The 3M Liqui-Cel EXF-4×13 is available in polypropylene housing for standard duty, or 316L stainless steel vessel and end caps (surface finish ≤ 0.8μm SI / 32 RA) for higher pressure and temperature service or sanitary applications. Overall dimensions are nominal 512 mm (20.1 in) length, 116 mm (4.6 in) diameter body, with a 413 mm (16.3 in) flange-to-flange face. Dry weight is approximately 3 kg for the polypropylene version and 6 kg for the 316L stainless steel version, rising to roughly 5 kg and 7 kg respectively once shellside water-filled.

Shellside liquid connections are offered as 1 inch sanitary, ¾ inch NPT female, or 1 inch GF/Rc ¾ per JIS B0203, while lumenside gas connections use 1 inch 90° sanitary, ¾ inch 90° NPT female, or JIS threaded fittings, allowing the contactor to be dropped into existing skid piping with minimal custom fabrication. Seal material options include FKM, FFKM (K-UPW grade for ultrapure water), and Buna-N depending on membrane type, housing material, and connection style. On the 3M Liqui-Cel EXF-4×13, the polypropylene/X50 or X40 shellside liquid path is rated up to 7.2 barg at 5–30°C, while the 316L stainless steel housing extends the working envelope to 9.3 barg at 5–50°C, giving system designers flexibility to match contactor selection to actual process conditions.

Key Features

The 3M Liqui-Cel EXF-4×13 membrane contactor delivers a combination of mass transfer efficiency and mechanical simplicity that makes it the standard choice for compact dissolved gas control systems. Key features include:

• Extra-Flow cartridge design with center baffle directs liquid flow perpendicular to the hollow fiber bundle for significantly higher mass transfer efficiency than parallel-flow contactors.
• Microporous polypropylene hollow fiber membrane provides a non-dispersive gas-liquid interface with zero direct contact between process fluid and stripping gas or vacuum source.
• Available with X50 membrane optimized for free CO2 removal or X40 membrane suited to dissolved oxygen stripping and general gas transfer duties.
• Liquid flow guideline of 0.5–3.4 m³/hr (2–15 gpm) suits laboratory feasibility testing through low-flow point-of-use applications.
• Polypropylene or 316L stainless steel housing options accommodate working pressures up to 7.2 barg and 9.3 barg respectively.
• Sanitary, NPT, and JIS flange connection options simplify integration into new or existing shellside and lumenside piping.
• FKM, FFKM (K-UPW), and Buna-N seal materials are available, with FKM-sealed units built from FDA Title 21 CFR § 170-190 compliant wetted materials.
• Compact nominal footprint of 512 mm length and 116 mm diameter allows multiple contactors to be racked on a single skid for higher throughput duty.

Industrial Applications

The 3M Liqui-Cel EXF-4×13 is specified wherever dissolved gas control directly protects downstream equipment or product quality. Power generation plants use the 3M Liqui-Cel EXF-4×13 to strip dissolved oxygen and carbon dioxide from boiler feedwater and condensate, reducing corrosion in steam-side metallurgy. Semiconductor fabrication facilities integrate it into ultrapure water polishing loops to hold dissolved oxygen at parts-per-billion levels ahead of wet bench processing, while RO desalination and municipal water treatment plants use it to remove free CO2 from permeate before ion exchange or remineralization, extending resin life and reducing chemical dosing.

As the officially authorized partner for 3M in the region, Seven Star LLC distributes the Liqui-Cel EXF-4×13 to district cooling operators, RO desalination plants, pharmaceutical water-for-injection systems, and oil and gas processing facilities throughout Oman and the GCC, including projects across the Sohar and Salalah economic zones. Facility engineers in Muscat and beyond depend on Seven Star LLC not only for authentic 3M Liqui-Cel cartridges and correct membrane selection, but for sizing support, spare cartridge stocking, and technical guidance that keeps degassing systems running at rated performance.

Technical Specifications

The table below summarizes the core specifications of the 3M Liqui-Cel EXF-4×13 membrane contactor as published in the 3M technical datasheet.

Call To Action

Seven Star LLC supplies the 3M Liqui-Cel EXF-4×13 membrane contactor from regional warehouse stock across Oman, and the 3M Liqui-Cel EXF-4×13 remains in stock for rapid dispatch across Oman and the GCC, with formal RFQ processing, technical datasheet downloads, and direct access to our instrumentation and process equipment division for membrane and seal selection support. As the authorized partner for 3M in Oman and the GCC, Seven Star LLC guarantees genuine Liqui-Cel cartridges, correct sizing for your dissolved gas removal or addition duty, and ongoing replacement cartridge availability – contact our team today for a formal quotation.