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
Fisherbrand™ Imbuto in vetro borosilicato
Imbuto liscio in vetro borosilicato. L'imbuto in vetro borosilicato Fisherbrand™ è ideale per il travaso di liquidi in applicazioni di laboratorio.
Fisherbrand™ Imbuti per polveri
Gli steli paralleli riducono al minimo il passaggio di polveri
BRAND™ Imbuto in vetro borosilicato
In vetro borosilicato. L'imbuto in vetro borosilicato BRAND™ include un bordo superiore lucidato a fuoco o smerigliato. Lo stelo corto garantisce una penetrazione ottimale. Con angolo a 60 °C.
Thermo Scientific™ Nalgene™ Large HDPE Funnels
Choose a safer alternative to glass with this shatterproof funnel, featuring external and internal ribbing for air release.
Scientific Glass Labs™ Imbuto per sostanze in polvere in vetro borosilicato
In vetro borosilicato. L’imbuto per polveri Scientific Glass Labs™ in vetro borosilicato rende meno probabile l’intasamento o l’ostruzione quando si imbottigliano sostanze polverose.
BRAND™ Imbuti in polipropilene con interno liscio
Opzione eccellente in grado di resistere alle alte temperature per l'impiego generico in laboratorio.
BRAND™ Polypropylene Powder Funnels
Constructed of durable, lightweight polypropylene. Brand™ Polypropylene Powder Funnels are an excellent option for the transfer of samples without flow rate restrictions.
Thermo Scientific™ Nalgene™ Utility Funnels
Replace glass lab funnels with these utility funnels, which are an excellent shatter-proof alternative.
BRAND™ Imbuto per sostanze in polvere in vetro borosilicato
In vetro borosilicato. L'imbuto per polveri in vetro borosilicato BRAND™ include un bordo superiore lucidato a fuoco o smerigliato. Lo stelo corto e ampio è ottimale per l'incanalamento di polveri e altri materiali granulari.
Thermo Scientific™ Nalgene™ Polypropylene Powder Funnels
Transfer powders with these powder funnels. Parallel stem minimizes bridging of powder and external ribbing prevents air locks. A shatter-proof alternative to glass.
Fisherbrand™ Imbuto in vetro sodico-calcico
Imbuto liscio in vetro soda-calcico. L'imbuto in vetro soda-calcico Fisherbrand™ è ideale per il travaso di liquidi in applicazioni di laboratorio.
Fisherbrand™ Imbuti in PTFE
Con superficie interna ultra liscia antiaderente. Imbuto in PTFE resistente alle sostanze chimiche e inerte.
Cole-Parmer™ Stainless Steel Funnel
Stainless steel funnels are a laboratory supply you will count on for years of use.
Nickel Electro™ Imbuto da laboratorio in acciaio inox 304
Da utilizzare con o senza membrane filtranti per la filtrazione per gravità e per semplici procedure che prevedono l’uso di un imbuto. L'imbuto da laboratorio in acciaio inox Nickel Electro™ è dotato di scanalatura di sfiato per un flusso completo e continuo di liquidi o solidi.
Kartell™ Imbuto per uso generico in HDPE
Realizzati in HDPE per garantire la massima robustezza e resistenza chimica. Gli imbuti per uso generico Kartel™ HDPE forniscono sicurezza e precisione durante la fase di riempimento dei flaconi in laboratorio.