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
Sigma Aldrich Fine Chemicals Biosciences FILTER FUNNEL GLASS 50 ML
NC2892924 FILTER FUNNEL GLASS 50 ML
California Pacific Lab & Consulting FUNNEL SAFETY HAZARDOUS
Eco Funnel System, System Includes : 8 in. Eco Funnel, 4L Polyethylene Container, Secondary Container and Base, 38-430 Screw Cap
Chemglass Life Sciences 100mL Powder Addition Funnel, 24/40 Joint Size, Auger A
100mL Powder Addition Funnel, 24/40 Joint Size, Auger A. Facilitates the delivery of free-flowing, granular solids into reactions. Pressure equalizing arm is equipped with a vented stopper for air-free operations and also permits access into the delivery stem for easy clean-out. One piece, easily removed grooved PTFE auger delivers powders at a uniform rate. Funnel has a lower inner joint and top outer, both being the size listed.
Chemglass Life Sciences Funnel, Powder, PTFE, 79mm Diameter, Stem 18mm, 116mm Height
PTFE powder funnel is totally chemically inert with super smooth non-stick internal finish.Virgin grade PTFE conforming to FDA and USP Class VIChemical Resistance is virtually total.Temperature Range, -200°C to 260°C (-328°F to 500°F).Shelf life is considered indefinite within the confines of normal use and storage conditions.Autoclavable
California Pacific Lab & Consulting FUNNEL SAFETY HAZARDOUS
Funnel, HDPE; California Pacific; ECO; Capacity: 2000mL; 8 in.; Cap size: 70mm; Suitable for 20L carboy; Easy use lid, gasket, and positive latch; Interior filter; 11 in. stem
Prism Research Glass POWDER FUNNEL 14/20 JOINT
Powder funnel 14/20 joint offset straight side to be used with multi neck flask
Chemglass Life Sciences 4" ECO Funnel, 38-430 Thread, 1/16" HPLC Fitting, Use CG-1759-10 Waste Container
4" ECO Funnel, 38-430 Thread, 1/16" HPLC Fitting, Use CG-1759-10 Waste Container. Same as the standard 4" ECO Funnel, but with the addition of an HPLC waste hook adapter that connects to the side of the funnel eliminating the danger of dangling waste lines into bottles and containers.
Hach Company Funnel, Micro
Ideal for micro work, filling burets, manometers, and small bottles. Steam autoclavable at 250°F (121°C).
Enterprise Technology Solutions Regular Stems Assorted
Regular Stems 12 X 4 Mm Metal Wire Polyester Assorted 1 000/box
Grainger Folding Funnel 12 oz 1/2 Dia Spout
The Funnel King Folding Spout Funnel is a polyethylene funnel with a folding spout that can be folded down for compact storage. It has a wide mouth opening and tapered body to easily guide liquids or powders into containers and features a flexible spout that folds down flat against the funnel body. This folding funnel has a 6 inch diameter mouth opening and stands 5 inches tall. It's made from durable polyethylene plastic and can hold up to 1 quart of liquid. The folding spout design allows this funnel to take up less space for convenient storage.