Membrane Pleated Filters

Membrane Pleated Filter Cartridges

  CMI Membrane Pleated Filter Cartridges are designed for high-efficiency removal of fine particles and microorganisms in critical liquid filtration applications. Using advanced pleated membrane technology, these cartridges provide high flow rates, low pressure drop, and consistent filtration performance across a wide range of industries. Depending on chemical compatibility and process requirements, multiple membrane materials are available, including Nylon, Polyethersulfone (PES), Polypropylene (PP), and Hydrophilic PTFE. All cartridges are manufactured under strict quality control and are 100% integrity tested to ensure reliable and repeatable performance.

Key Features

• High-efficiency pleated membrane construction
• Nominal or absolute rated filtration (up to 99.9%+)
• Low initial differential pressure
• Long service life with high dirt-holding capacity
• Broad chemical compatibility
• Thermally bonded construction (no adhesives)
• Autoclavable and suitable for repeated sterilization
• Multiple adapter and sealing options
• FDA-compliant materials for food and pharmaceutical use
• 100% integrity testing before shipment

Available Membrane Types

Nylon 6.6 Membrane (Hydrophilic)

• Naturally hydrophilic membrane
• No surfactants or wetting agents
• Fast wetting and stable flow
• Ideal for aqueous solutions and general-purpose filtration

Typical Ratings: 0.22, 0.45, 1.0 μm Applications: Water, solvents, chemicals, pharmaceuticals

PES Membrane (Hydrophilic, Asymmetric)

• Highly asymmetric pore structure
• Excellent flow rate and throughput
• Very low protein binding
• Ideal for biopharmaceutical and high-purity applications

Typical Ratings: 0.04, 0.1, 0.2, 0.45, 0.65, 1.2 μm Applications: Pharma, biotech, DI water, buffers

Polypropylene (PP) Membrane

• Excellent chemical compatibility
• Broad micron range
• Economical choice for industrial filtration
• All-polypropylene construction

Typical Ratings: 0.2–100 μm Applications: Chemicals, process water, industrial liquids

Hydrophilic PTFE Membrane

• Outstanding chemical and corrosion resistance
• Hydrophilic PTFE allows direct liquid filtration without pre-wetting
• Suitable for strong acids and bases
• High temperature resistance

Typical Ratings: 0.05, 0.1, 0.22, 0.45, 1.0 μm Applications: Semiconductor chemicals, aggressive fluids, ultrapure processes

Hydrophobic PTFE Membrane

• Naturally hydrophobic PTFE membrane
• Excellent chemical and corrosion resistance
• Suitable for gas, air, and aggressive liquid filtration
• High temperature resistance
• Absolute-rated filtration efficiency >99.9%
• Can be used for sterile venting and gas filtration

Typical Ratings: 0.1, 0.22, 0.45, 1.0 μm Applications: Sterile air and gas filtration, tank vent filtration, aggressive and oxidative fluids, chemical processing gases

Construction Materials

• Filter Media: Nylon / PES / PP / Hydrophilic PTFE / Hydrophobic PTFE
• Inner Core & Cage: Polypropylene or Stainless Steel
• End Caps & Adapters: Polypropylene
• Seal Materials: EPDM, NBR (Buna-N), Viton, Silicone, FEP/Silicone, FEP/Viton

Specifications

• Micron Ratings: 0.04 – 100 μm
• Lengths: 10”, 20”, 30”, 40”
• Outside Diameter: 60 mm / 63 mm / 65 mm / 68 mm
• Maximum Operating Temperature: Up to 93°C (standard), higher for PTFE configurations
• Maximum Differential Pressure: Up to 5.5 bar @ 21°C (depending on membrane type)
• Recommended Change-Out ΔP: 2.1 bar @ 21°C
• End Connections & Adapters: Double Open End (DOE); 222 O-ring (flat / fin); 226 O-ring (flat / fin); customized adapters available upon request

Applications

• Pharmaceutical & biotechnology processes
• Semiconductor chemical filtration
• Food & beverage production
• Ultrapure water systems
• Chemical processing
• Laboratory and analytical filtration
• Industrial process liquids

Customization & OEM Capability

• Choice of membrane material
• Nominal or absolute rated filtration
• Custom micron ratings
• Various lengths and diameters
• Multiple sealing materials
• OEM branding and private labeling

Why Choose CMI Membrane Pleated Cartridges

• Complete membrane material portfolio
• Consistent manufacturing and quality control
• 100% integrity tested products
• Broad chemical compatibility
• Competitive alternative to international brands
• Strong OEM and customization capability