TECHNICAL ARTICLES
Technical Articles
A shared language for selection, from basic concepts to practical methods.
Filter Ratings: Define Before You Compare ↗
1 μm equals 1,000 nm. Even after converting units, compare rating definitions, test methods and retention efficiency. Equal numbers do not necessarily mean equal process performance.
Materials & CompatibilityLook Beyond the Membrane ↗
Fluid may contact the membrane, support layers, housing, core, end caps and seals. A membrane name is not a complete wetted-material specification.
Process applicationsReading a Flow Curve: Conditions Matter ↗
Review fluid, temperature, cartridge length, area and rating. Curves measured under different conditions cannot be compared by flow rate alone.
Selection guideHydrophilic or Hydrophobic? Start with the Fluid ↗
Hydrophilicity and hydrophobicity describe how liquids wet a membrane surface. Selection also depends on material, fluid composition, pressure and product construction.
Process applicationsCMP Filtration: Removal and Retention ↗
Slurry filtration involves controlling oversized particles while retaining useful abrasives. A single nominal rating cannot describe the relationship between these goals.
Validation and maintenancePlanning a Meaningful Filter Trial ↗
Specify the current problem, the measure to improve and the conditions to hold constant. Avoid changing too many variables in one trial.
Technical guides & practical checkpoints
Membrane selection: compatibility, recovery and wetting
Screen materials against the actual fluid and complete flow path, then compare changes in a controlled small-scale trial.
Read guide →Formats and systemsCartridge, capsule or bag: choose the service format
Compare connections, changeout, venting, drainage and batch losses so the format fits the way the process is operated.
Read guide →Process applicationsLiquid and gas filtration: why ratings are not interchangeable
Distinguish flow references, condensation, wetting state and validation methods before transferring a filter between duties.
Read guide →Laboratory methodsLaboratory recovery: build a mass balance
Use blanks, fraction collection and volume records to distinguish adsorption, hold-up and analytical interference.
Read guide →Validation and maintenanceSterilizing filtration: from product evidence to process validation
Distinguish pore rating, microbial retention, integrity testing and the protected downstream boundary.
Read guide →Process applicationsMedia and buffer filtration: protect formulation and capacity
Plan preparation and filtration around dissolution, sensitive components and representative batch trials.
Read guide →Membrane separationTangential flow filtration: concentration and buffer exchange
Understand the three streams, transmembrane pressure and recovery before using flux as an optimization target.
Read guide →Water treatmentUF and MBR: identify the role of the membrane
Distinguish standalone ultrafiltration from membrane bioreactors using feed conditions, net production and recoverability.
Read guide →Validation and maintenanceInstallation and start-up: establish a repeatable baseline
Check configuration, seals and flow direction, then use controlled filling and venting to establish the initial operating state.
Read guide →TroubleshootingPressure and flow troubleshooting: identify the pattern first
Use upstream and downstream pressure, flow, temperature and time trends to narrow the cause before changing a filter.
Read guide →Validation and maintenanceClean or replace: decide from reuse qualification and evidence
Separate cleanable design, single-use limits, performance recovery and the quality requirements of the next use.
Read guide →Selection guideReading a data sheet: put each number back in context
Distinguish series options, typical values, operating limits and validation evidence to avoid transferring claims between models.
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