TN Lab Supply Heavy Wall Borosilicate 3.3 Glass Conical Erlenmeyer 250 ml Filter Flasks Conical glass filter flask also known as vacuum flasks or Büchner flask because they are typically used in filter applications Filter Flask have heavier walls than a standard conical flask to endure effects of vacuum filtration Sidearm with barbs extends 1 1/2" with a outside diameter of 3/8" allowing flexible hose solutions to a vacuum pump or system. Vacuum hose with 3/8" ID is perfect for attaching to the filter flask. During filtration, the filtrate enters and is held in the flask while the sample or residue remains on the filter paper in the funnel. Can also be used as a vacuum trap in a vacuum line. Borosilicate 3.3 is highly leach resistant to most chemicals Manufactured to ISO: 9001, CE Certification Heavy Wall 250 ml Borosilicate 3.3 Glass Narrow Neck Graduated Filter Flask Applications Vacuum filtration using Buchner or other funnels Vacuum aided evaporation or separation Heating of solid and liquid chemicals Evaporation of water or solvents Mixing and dissolution of chemicals into liquid Chemical reactions of organics and/or inorganics Collection of samples analysis or other treatment 250 ml Filter flask is used primarily as a flask to draw a vacuum to enhance the rate of filtration when using a Buchner funnel Sidearm with barbs extends 1 1/2" with a outside diameter of 3/8" allowing flexible hose solutions to a vacuum pump or system. Vacuum hose with 3/8" ID is perfect for attaching to the filter flask. Filter flasks are also used a separating flask in a vacuum line to remove liquids that to prevent being carried though a vacuum line 250 ml Conical Filter Flasks are also used with other types of filter that may utilize either a paper or other types of frit such as glass or plastic The vacuum being applied increased the draw through a filter membrane to nearly an atmosphere of pressure if the vacuum level is low enough. The glass frit is reusable and often used with paper or other removable disk filters The clamp is used as both a mechanism to hold the 250ml funnel in place during filtration and to permit easy change of filter media and retrieval of the solids captured on the filter media. The filter may be used in gravimetric applications where the filter media may be dried and weighed to determine the weight of solids collected in a given liquid volume or process.
