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
Chemglass Life Sciences 75mm Powder Funnel, Modified, 29/42 Inner Joint, 25mm Flat Sided
75mm Powder Funnel, Modified, 29/42 Inner Joint, 25mm Flat Sided. Similar to CG-1720, but with one side flattened to allow funnel to be used in multi-neck flasks where space is limited. Flat side dimension is the distance between the center of the standard taper inner joint and the flattened side of the funnel. Funnels have 60º angled sides with a standard taper inner joint.
Chemglass Life Sciences 100mm Powder Funnel, Modified, 29/42 Inner Joint, 35mm Flat Sided
100mm Powder Funnel, Modified, 29/42 Inner Joint, 35mm Flat Sided. Similar to CG-1720, but with one side flattened to allow funnel to be used in multi-neck flasks where space is limited. Flat side dimension is the distance between the center of the standard taper inner joint and the flattened side of the funnel. Funnels have 60º angled sides with a standard taper inner joint.
Chemglass Life Sciences 75mm Powder Funnel, Offset, 24/40 Inner Joint, C to C Offset is 30mm
75mm Powder Funnel, Offset, 24/40 Inner Joint, C to C Offset is 30mm. Funnel has a lower stem made with an offset to permit use with multi-neck flasks.
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
Bellco Glass, Inc. Manufactured from Type 1 Class A Borosilicate Glass. Ideal for use of filling other glass vessels. Receiving vessel is placed under bell to maintain sterility during filling. Attaches to reservoir with rubber tubing. Dimensions: 104x130mm Tubing s
Manufactured from Type 1 Class A Borosilicate Glass. Ideal for use of filling other glass vessels. Receiving vessel is placed under bell to maintain sterility during filling. Attaches to reservoir with rubber tubing. Dimensions: 104x130mm Tubing s
California Pacific Lab & Consulting 4IN FUNNEL SAFETY HAZARDOUS
Eco funnel, 4 in. dia. w/38-430 screw cap. Made of HDPE and has an easy use lid, gasket, positive latch, filter, and an 11 in. stem to effectively reduce chemical evaporation of hazardous solvents in the lab, 250mL
Ace Glass, Inc. 100mm powder funnel with 35/25 inner joint
100mm powder funnel with 35/25 inner joint is useful in pouring powders or liquids into ground joint containers.
California Pacific Lab & Consulting 8" ECO FUNNEL,SYSTEM,10 LITER
8" ECO Funnel, System, 10 Liter, 83mm Cap adapter (83B)The 8 inch ECO Funnel with 10 Liter Waste Disposal System and 83mm screw cap features a latching lid with gasket to keep fumes contained. A removable large particle filter catches stir bars or other items. The 11" funnel stem reduces chemical evaporation, and the secondary air lock tube helps prevent over-filling.