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
MSC PRO-LUBE 1707001 8 oz Capacity Plastic Funnel 4-1/2" Mouth OD, 1/2" Tip OD, Straight Spout, Red
PRO-LUBE 1707001 8 oz Capacity Plastic Funnel 4-1/2" Mouth OD, 1/2" Tip OD, Straight Spout, Red
Chemglass Life Sciences Funnel, Process Reactor, Large, Polypropylene, 14.1L Capacity, 350mm Top, 80mm Flange
Funnel, Process Reactor, Large, Polypropylene, 14.1L Capacity, 350mm Top, 80mm Flange. Large funnels have a 80mm flange fused to the bottom of the funnel. This design makes them ideal for filling Chemglass's process reactors by clamping the funnel directly to the powder addition port. The wide mouth funnel has a large opening to optimize flow. The 4.3L size has a handle at the rim. Main body and flange are made from Polypropylene. Funnels are autoclavable at 121C (250F).
Chemglass Life Sciences Funnel, Solvent Addition, Stem 12mm OD X 75mm Long
Funnel, Solvent Addition, Stem 12mm OD X 75mm Long. Design of funnel permits addition of solvents to flash chromatography columns without disturbing the silica-gel / packing layer. Lower end of the funnel is closed and the stem has a series of small holes through which the solvent drains. Top of the funnel is 75mm (3in) in diameter with the stem size as listed.
Chemglass Life Sciences Funnel, Solvent Addition For Chromatography Column, Assorted Pack
Funnel, Solvent Addition For Chromatography Column, Assorted Pack. Unbreakable, polypropylene solvent addition funnels useful for chromatography columns. The unique closed-end design facilitates gentle addition of solvent to the column. Perforated funnel stem permits solvent to pour down the column wall without disturbing the top layer of silica gel. Convenient assortment pack consists of five funnels for use with various column sizes. Approximate dimensions are provided.
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.
Foxx Life Sciences Borosil Funnels with 60 Angle Bowls and 50mm Stems, Medium (M), 20/CS
Borosil Short Stem Funnels are built for durability & long-term use. Funnels have 60 bowl angles for perfect fit with filter papers. Used for filtration & decanting of a wide variety of liquids. Built from Borosil's world-renowned 3.3 borosilicate, low-expansion, chemically resistant glass. Avail. in a variety of sizes from 25mm diameter (XS, Extra Small) to 100mm diameter (XXL, 2X-Extra Large). Borosil Short Stem Funnels comply with DIN/ISO 4798. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil Type 3.3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust Borosil Laboratory Glassware offers unparalleled mechanical strength, clarity & reliability at competitive prices. And thanks to a unique annealing process, Borosil Glassware is stress-free & incredibly resistant to thermal shock.