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
Thomas Scientific STERIWARE BLUE LIQUID FUNNEL,
SteriWare Blue Liquid Funnel, PP,100mm Top Diameter, Sterile
Prism Research Glass POWDER FUNNEL 14/20 JOINT
Powder funnel 14/20 joint offset straight side to be used with multi neck flask
California Pacific Lab & Consulting 4" ECO FUNNEL SYSTEM, 1 GALLON
4" ECO Funnel System, 1 gallon Jug with Handle, Secondary Container
MSC PRO-LUBE 1707002 16 oz Capacity Plastic Funnel 6" Mouth OD, 3/4" Tip OD, Straight Spout, White
PRO-LUBE 1707002 16 oz Capacity Plastic Funnel 6" Mouth OD, 3/4" Tip OD, Straight Spout, White
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
MSC PRO-LUBE 1707005 2 Qt Capacity Polyethylene Funnel 7" Mouth OD, 1" Tip OD, Straight Spout, Red
PRO-LUBE 1707005 2 Qt Capacity Polyethylene Funnel 7" Mouth OD, 1" Tip OD, Straight Spout, Red
Chemglass Life Sciences Filling Bell, Aseptic, 49mm ID, 100mm OAH
Filling Bell, Aseptic, 49mm ID, 100mm OAH. For aseptic filling of vessels. Tubing is attached to the serrated hose connection while the receiving vessel is placed inside the bell. Made from Type 1 Class A borosilicate glass.
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.
iXCells Biotechnologies AdiposeDerived Stem Cell Attac
Adipose-Derived Stem Cell Attachment Medium - 500mL
BURKLE INC Funnel, stainless steel, V2A, outer-Ø 2.36 in. (60 mm)
The rugged stainless steel filling funnel makes it easy to fill and transfer free-flowing powders, liquids and low-viscosity media. With an air vent on the discharge tube, it provides complete and unobstructed flow for efficient handling of a wide variety of materials.
The larger versions of the feed hopper are also equipped with a handle, which not only increases safety when handling larger fill quantities, but also improves usability in industrial environments.