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
Ace Glass, Inc. Powder funnel, 75mm, angle heavy wall, 24/40 joint
75mm heavy wall angle powder funnel with 24/40 standard taper joint. For use with pouring powders or liquids into multi-neck flasks.
Ace Glass, Inc. 190mm powder funnel with 45/50 inner joint
190mm powder funnel with 45/50 inner joint is useful in pouring powders or liquids into ground joint containers.
Ace Glass, Inc. Funnel, powder, flat side, 71/60, 255mm OD opening, 300mm height above the joint
Funnel, powder, flat side, 71/60, 255mm OD opening, 300mm height above the joint
Ace Glass, Inc. 150mm powder funnel with 29/42 inner joint
150mm powder funnel with 29/42 inner joint is useful in pouring powders or liquids into ground joint containers.
Ace Glass, Inc. 100mm powder funnel with 29/32 inner joint
100mm powder funnel with 29/32 inner joint is useful in pouring powders or liquids into ground joint containers.
Cole-Parmer Scienceware H14660-0065 polypropylene powder funnel, 70 mL
Polypropylene funnels have 60°> wall incline. Use for transferring powders. Parallel stem minimizes bridging of powder. Bel-Art.
Ace Glass, Inc. Funnel, heavy wall glass, angled, 24/40 joint, 100mm ODx140mmlength
Funnel, heavy wall glass, angled, 24/40 joint, 100mm ODx140mmlength
US Plastic Corporation MINI POLYPROPYLENE FUNNEL
These polypropylene and high density polyethylene funnels have many uses. They are inexpensive, lightweight, and durable. They have numerous general applications in the laboratory.
US Plastic Corporation 16 oz. Polyethylene Funnel - 5" Dia. x 6-1/4"H
These polypropylene and high density polyethylene funnels have many uses. They are inexpensive, lightweight, and durable. They have numerous general applications in the laboratory. The 6-3/8" size has a large throat opening for quick transfer of materials.
Sigma Aldrich Fine Chemicals Biosciences Ace powder funnel with flat side top diam. 100 mm, Joint: ST/NS 24/40 | 1EA
Ace powder funnel with flat side top diam. 100 mm, Joint: ST/NS 24/40 | 1EA
California Pacific Lab & Consulting 8" ECO Funnel with 100mm cap adapter (Nalgene)
This 8" ECO Funnel is designed to fit a 9 liter Nalgene container with a 100mm closure. Our patented design features a latching lid with gasket to keep fumes contained. A removable large particle filter catches stir bars or other items. A detachable tube extends into the waste container to minimize chemical evaporation. The 8" version of our ECO Funnel includes an additional safety feature to prevent over-filling; a secondary air-lock tube creates a small air gap in your waste container, which causes fluid to back up temporarily into the funnel when the container is full. After the screw cap adapter is loosened, the remaining fluid will safely flow into the container and not spill.
Thomas Scientific STERIWARE BLUE LIQUID FUNNEL,
SteriWare Blue Liquid Funnel, PP,100mm Top Diameter, Sterile