Polypropylene Buchner Funnels for Vacuum Filtration
These heavy-duty polypropylene Buchner funnels provide efficient vacuum-assisted filtration for analytical chemistry, environmental testing, and pharmaceutical quality control laboratories. Each PP Buchner funnel features a two-piece snap-together design with a perforated plate that accepts standard flat disc filters including cellulose, glass microfiber, and polymeric membrane filters. The vacuum-tight seal between the upper cone and lower stem requires no grease, simplifying setup and preventing sample contamination.
Two-Piece Design for Easy Cleaning and Filter Replacement
The snap-fit construction allows quick disassembly for thorough cleaning and effortless filter paper replacement without removing the funnel from the filter flask or bench-top rack. Manufactured from chemical-resistant virgin polypropylene, these Buchner funnels resist acids, bases, and most organic solvents while remaining virtually unbreakable under normal laboratory conditions. All sizes are fully autoclavable at 121°C for reliable sterilization between filtration runs.
Specifications by Size
| Funnel Size | Filter Disc Size | Material | Stem Connection |
|---|---|---|---|
| 45mm | 47mm disc | Virgin PP | Standard taper |
| 55mm | 50mm disc | Virgin PP | Standard taper |
| 70mm | 70mm disc | Virgin PP | Standard taper |
| 80mm | 80mm disc | Virgin PP | Standard taper |
| 90mm | 90mm disc | Virgin PP | Standard taper |
| 110mm | 110mm disc | Virgin PP | Standard taper |
| 160mm | 150mm disc | Virgin PP | Standard taper |
| 240mm | 240mm disc | Virgin PP | Standard taper |
Vacuum Filtration Setup
Pair any polypropylene Buchner funnel with a borosilicate glass filter flask (sold separately) and an appropriately sized rubber adapter for a complete vacuum filtration system. The tapered stem fits standard filter flask necks, providing a secure connection under vacuum. Use with cellulose filter paper for routine gravity and vacuum filtration, glass microfiber filters for fine particulate removal, or membrane filters for microbiological analysis and sterility testing.
Laboratory Applications
Buchner funnels are indispensable for separating precipitates from reaction mixtures, collecting crystallized products, clarifying solutions before analysis, and performing solid-liquid separations in environmental water testing. The polypropylene construction makes these funnels ideal for applications where glass breakage poses a safety concern, including teaching laboratories and field sampling operations.
Below Retail Pricing from LabSupplies.com
LabSupplies.com is an authorized Globe Scientific dealer offering Buchner funnels at below retail pricing with fast USA shipping. Volume discounts are available for research institutions and university purchasing departments. Choose your size from the dropdown above.