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
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.
Electron Microscopy Sciences CytoSep™ Plastic Cytology Single Funnel Tubing with White
CytoSep Cytology Funnels are totally disposable, eliminating time consuming decontamination and cleaning. They are safe to use and reduce the risk of exposure to pathologic samples.They also decrease the possibility of cross-contamination.
This series of CytoSep Funnels is single-use. The disposable sample chambers do not need metal clips and are designed to meet any processing equipment. They are capable producing high quality thin-layer slide preparation while improving laboratory efficiency. White Filter Cards for sample volumes up to 0.5 ml.
Ace Glass, Inc. Powder funnel, 75mm, HW 24/40 joint
75mm heavy wall powder funnel for greater durability when pouring powders or liquids into ground joint containers. Funnel has a 24/40 standard taper joint.
BURKLE INC Disposable liquid funnel, PS, Ø 3.94 in (100 mm), white, sterile
Disposable funnel for reliable filling of liquids, ideal for filling bottles and other containers with a narrow filler opening.
The disposable funnel ensures no loss when transferring liquid samples or free-flowing solids. That makes this practical and hygienic pouring aid a helpful accessory for sampling or in laboratories.
Clean room produced funnel with suspension eye and venting fins for ventilation to ensure uniform flow while pouring.
In combination with a filter paper the disposable funnel is also well suited for filtering.
Chemglass Life Sciences Chemglass 12 mm PTFE Stem, Replacement for Chem-Drain Valve
Replacement PTFE stem for 12 mm drain valves, intended for use as a spare or repair part to restore sealing and flow control in Chem-Drain style valve assemblies. Manufactured from PTFE for broad chemical resistance and smooth operation, the stem is sized to fit 12 mm valve assemblies and permits drainage of particulate-laden solutions.
- 12 mm stem diameter for standard 12 mm drain valve assemblies.
- PTFE material provides excellent chemical resistance and low friction.
- Permits drainage of liquids and solids up to 2 mm in diameter.
- Designed for use as a replacement or spare stem for repair and maintenance.
- Simple installation; compatible with valve bodies where PTFE components are supported.
Ace Glass, Inc. 100mm powder funnel with 24/29 inner joint
100mm powder funnel with 24/29 inner joint is useful in pouring powders or liquids into ground joint containers.