Filling Funnels
Funnels have a conical shape and short, wide stems for filling bottles or transferring powders. Filling funnels typically have a 60-degree angle that permits accurate fitting of filter paper, as well as vents or flutes to reduce vacuum formation and decrease filtering time.
Filling Funnel Materials
Glass
Borosilicate glass filling funnels include a strong beaded edge that resists chipping. Their resistant structure allows for the use of various reagents and chemicals. They also have a high resistance to thermal and mechanical shock and chemical attack. Funnels made from flint glass and soda-lime glass are also available.
Plastic
Plastic filling funnels may be disposable or reusable and are made from polystyrene, polypropylene, polyethylene (LDPE or HDPE), or other resins.
Metal
Metal funnels are durable and reusable and may be constructed from a variety of metals. Each has characteristics that facilitate a particular use and purpose.
Filling funnels are available in a range of sizes and dimensions. They are typically sized based on capacity — the volume they can contain. Dimensionally, they may vary in top diameter, stem length, stem diameter, bowl angle, bowl capacity, and overall length. Filling funnels may be classified as Class A or Class B based on tolerances specified by ASTM and other standards.
What Different Types of Glass Funnels Are Available?
• General-purpose glass filling funnels for channeling, filling, and decanting liquids
• Short-stem or powder funnels to prevent the stem from clogging during the handling of fine powders
• Long-stem analytical funnels, often used with filter papers
• Fluted funnels to help reduce vacuums and facilitate more rapid filtration
• Büchner, glass-filtering, or vacuum filtration funnels made with an integral sintered glass disc for filtering precipitates or particulates without the need for filter papers. The sintered discs come in a range of pore sizes, typically from 10 to 40 μm
• Pear-shaped separatory funnels (separating or separation funnels) fitted with a stopper and a PTFE or glass stopcock for separating layered immiscible liquids in chemistry applications
• Weighing funnels to function as weighing dishes and to transfer weighed solids to other vessels
Corning™ PYREX™ 60° Angle Fluted Funnel, Short Stem
Useful in clinical and hospital labs; can be used in flasks or tubes without racks
Corning™ Plain Reusable Short Stem Plastic Funnels
Durable polypropylene funnels are translucent and allow safe and easy transfers of solids or liquids from one vessel to another.
Bel-Art™ Urbanti™ High-Speed Funnels
Optimized for nonvacuum, high-speed filtration, these glass-clear funnels have internal helicoid ribs to increase the filtration speed
Caplugs™ (Evergreen Scientific) Disposable Funnels
Economical funnels for a variety of applications.
Fisherbrand™ Large LDPE Funnels
Large plastic funnels for transferring liquids at temperatures up to 80°C (180°F).
Thermo Scientific™ Nalgene™ Heavy-Duty LDPE Funnels
Avoid breakage and corrosion with these heavy-duty funnels, the toughest large funnels available.
Corning™ PYREX™ Funnel for Sugar Analysis
Molded construction with bottom ground flat and beaded rim
Corning™ PYREX™ Plain Diameter 60° Angle Funnel with Short Wide Stem
Beaded rims reduce chipping
Bel-Art™ Micro Funnels
Designed for micro work, filling burets, manometers and small bottles
DWK Life Sciences Kimble™ KIMAX™ Addition Funnels with 58° Angle Bowls and 150mm Stems
Bowls pressed to exact angle for fast filtering
Fisherbrand™ Reusable Glass Long-Stem Funnels
Promote faster, more effective filtering
Corning™ PYREX™ Plain 60° Angle Funnel with Long Narrow Stem
Permit precise filter paper fitting