Glass Holders for vacuum filtration applications of all sizes
Sterlitech Glass Filter Holders are available in a variety of sizes to accommodate most filtration applications, ranging from milliliters to liters of solution. Glass filter holders are reusable, easy to clean and sterilize, and enable precise filtration. They are recommended for use with polymeric Membrane Disc Filters to perform particulate collection and fluid filtration. Applying vacuum reduces process time compared to gravity flow.
Compared to other vacuum filter holders suited for coarse filtration (i.e. Buchner funnels), Glass Filter Holders form a tight seal with the membrane to ensure all fluid passes through its pores.
A typical holder apparatus consists of:
- glass base
- membrane support (glass frit, stainless steel, or PTFE)
- glass funnel
- rubber adaptor
- aluminum clamp
Glass frit supports are ideal for filtering acidic solutions, while stainless steel support screens offer the faster flow rate with viscous solutions. PTFE-coated supports provide the best of both worlds. Many of these holders, like the 150 mm Vacuum Filter Assembly, are sold with a vacuum receiving flask. All-glass assemblies are also available.
Sterlitech also carries the additional components such as pumps and tubing required to complete vacuum filtration assemblies, which can be selected individually or purchased in one of our Vacuum Filtration Kits. Our experts are happy to discuss any questions on building the proper filtration apparatus for your application.
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