vacuum filtration flask with stopper
A vacuum filtration flask with stopper is an essential laboratory apparatus designed for efficient separation of solids from liquids through vacuum-assisted filtration. This specialized glassware consists of a heavy-walled Erlenmeyer flask equipped with a side arm for vacuum connection and a rubber stopper that securely holds a filter funnel. The thick walls of the flask are engineered to withstand the negative pressure created during the filtration process, while the side arm connects to a vacuum source through rubber tubing. The rubber stopper creates an airtight seal between the flask and the filter funnel, ensuring optimal vacuum conditions. The design typically includes a ground glass joint at the top, allowing for seamless integration with various sizes of filter funnels or Buchner funnels. These flasks are available in multiple capacities, ranging from 250mL to 4000mL, making them suitable for both small-scale laboratory work and larger industrial applications. The borosilicate glass construction offers excellent chemical resistance and thermal stability, while the transparent nature allows for easy monitoring of the filtration process. This apparatus is widely used in chemical laboratories, pharmaceutical research, environmental testing, and educational institutions for applications such as crystallization, purification, and solid-liquid separation processes.