Alfa Laval Module M39L/H Membrane Filtration Parts and Membranes

Alfa Laval Module M39L/H Plate-and-Frame Cross-Flow Membrane Filtration Module Component Set – Replacement Support Plates, Seals, and Flat-Sheet Membranes for Ultrafiltration and Microfiltration

The Alfa Laval Module M39L/H (used in full-scale production plants as well as LabStak M39L/H and PilotUnit Combi M39 benchtop systems) is an industry-standard plate-and-frame cross-flow membrane filtration module engineered for high-efficiency ultrafiltration (UF) and microfiltration (MF). Specially developed for processing viscous liquids, fermentation broths, biological extracts, and food/beverage streams, the M39 architecture utilizes open-channel support plates and flat-sheet membrane pairs to establish high cross-flow velocities with low pressure drop. Available in low-channel (M39L for low-to-medium viscosity) and high-channel (M39H for high viscosity up to 30 cP) configurations, these genuine replacement support plates, end plates, PVDF locking strips, EPDM gaskets, and polymer flat-sheet membranes restore peak flow dynamics, maintain sanitary separation, and prevent cross-contamination in bio-pharmaceutical and industrial bioprocessing operations.

Technical Performance and Structural Design

• Dual Channel Options (M39L vs. M39H): M39L low-channel support plates (PL835) optimize flow velocity and energy efficiency for standard liquids (1 to 5 cP), while M39H high-channel plates (PL836) accommodate highly viscous fermentation broths and slurries (up to 30 cP) without channel clogging.

• Sanitary FDA & EEC Compliance: Built with high-purity polysulfone (PSO) or PEEK support plates, PVDF membrane locking strips, food-grade EPDM seals, and AISI 316 stainless steel internal hardware to meet strict biopharmaceutical, dairy, and food contact regulations.

• Broad Chemical & Thermal Endurance: Formulated to withstand continuous process temperatures up to 80 C, wide operating pH ranges (pH 1 to 14 depending on membrane selection), and system working pressures up to 8 bar (116 psi).

• Open-Channel Flow Dynamics: Plate-and-frame geometry features slotted internal permeate collection channels that deliver uniform trans-membrane pressure (TMP) distribution, reducing membrane fouling and extending operational run times between CIP cycles.

Product Specifications

• System Model / Series: Alfa Laval Module M39L / M39H (Compatible with LabStak M39L/H & LabUnit M39)

• Manufacturer / Brand: Alfa Laval AB

• Filtration Technology: Tangential Cross-Flow Plate-and-Frame Microfiltration (MF) & Ultrafiltration (UF)

• Support Plate Material Options: Polysulfone (PSO) or Polyetheretherketone (PEEK)

• Plate Channel Options: M39L Low Channel (Code PL835) / M39H High Channel (Code PL836)

• Membrane Type Compatibility: Standard Alfa Laval polymeric flat-sheet membranes (0.1 m2 surface area per sheet pair)

• Operating Pressure Limit: Up to 8 bar (116 psi) max inlet pressure

• Operating Temperature Limit: Up to 80 C (176 F)

• pH Operating Tolerance: pH 1.0 to 14.0

• Sealing Materials: PVDF locking strips, EPDM gaskets, and silicone rubber permeate hoses

Key Benefits and Applications

• Whole Broth Clarification & Downstream Processing: Ideal for harvesting whole broth, clarifying amino acids, organic acids, antibiotics, and recombinant proteins directly from dense fermentation media.

• Food, Dairy & Beverage Concentration: Widely deployed for whey protein concentration, juice clarification, sugar syrup filtration, and beer/wine polishing.

• Modular Scale-Up & Maintenance: Allows operators to easily replace worn flat-sheet membrane pairs or worn PSO/PEEK support plates without scrapping the heavy-duty stainless steel stack frame.

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