When to change a filter cartridge: differential pressure and service life
When to change a filter cartridge based on differential pressure: what ΔP measures, clean and change-out ΔP, warning signs, and how to log it batch by batch.
Technical blog
Filtration and bioprocessing, explained by the people who build it
Articles to select, operate and validate cartridges, housings and single-use systems, with data from our catalogs and engineering criteria.
AISI 304 vs. 316L stainless steel in sanitary equipment: differences and when to use each
AISI 304 vs. 316L stainless steel in sanitary equipment: molybdenum, carbon and welding, chlorides, passivation, Ra finish, and when to use each one.
Bacterial retention test (BRT): how sterilizing filtration is validated with your product
How sterilizing filtration is validated with your product in a bacterial retention test: worst case, bacterial viability, controls, and filter integrity.
How a coalescing filter separator for natural gas works
How a coalescing filter separator for natural gas works: the two stages, coalescence, change-out by differential pressure, and replacement in installed units.
Filter cartridge integrity test: bubble point and diffusive flow
How a filter integrity test works on a cartridge: bubble point, diffusive flow, and pressure hold, how to wet the membrane, and when to run the test.
How to choose a sanitary filter housing: material, finish, connections, and pressure
How to choose a sanitary filter housing: service, cartridges, 304 or 316L steel, Ra finish, connections, pressure, sterilization, and documentation.
Microbial stabilization of beverages by filtration before filling
Microbial stabilization of beverages by filtration before filling: which pore size retains yeast and bacteria, and how to set up the prefilters and final membrane.
PES or nylon membrane: how to choose a final filter cartridge
PES or nylon 6,6 membrane for your final filter cartridge: structure, pore sizes, filtration area per 10″, chemical compatibility, and applications of each.
Prefiltration: how to protect the final filter and lower the cost per liter filtered
Prefiltration that protects the final filter: depth, pleated and hybrid media, nominal vs. absolute ratings, and how to stage the steps to filter more liters.
Single-use bags or stainless steel vessels: when to choose each
Single-use bags or stainless steel vessels: cleaning and validation, cross-contamination, scale, costs and waste, and what to specify in a single-use bag.
Sterilizing filtration: what 0.2 µm means and how a filter is validated
Sterilizing filtration: what defines a sterilizing-grade filter, how ASTM F838 bacterial retention is validated, and when to use 0.1 µm instead of 0.2 µm in pharma.
Wine filtration step by step: from coarse filtration to the filler
Wine filtration in stages: coarse filtration, clarification, final filter protection, and the membrane before the filler, with housings, integrity, and sanitization.
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