Laboy Glass 250mL Addition Funnel Equalizing, 24/40 Joint, Stopcocks

Description

Product Overview

The Laboy 250 mL addition funnel is a premium piece of laboratory glassware designed for precise liquid handling in demanding scientific environments. Hand‑blown from high‑quality borosilicate glass, the funnel offers exceptional chemical resistance, thermal stability, and visual clarity, allowing users to monitor fluid flow at a glance. Its pressure‑equalizing design incorporates a vented top that balances internal and external pressures, eliminating the risk of back‑siphoning when adding reagents to closed systems. The 24/40 joint water top provides a standardized connection for a variety of laboratory accessories, while the two integrated glass stopcocks enable fine‑tuned control of flow rate and direction. The overall construction is robust yet lightweight, with a compact footprint that fits comfortably on most bench tops. Detailed specifications include a 250 mL capacity, a graduated scale for accurate measurement, and a smooth, rounded lip that minimizes splashing during transfer. Every component is meticulously inspected for defects, ensuring that each funnel meets Laboy’s strict quality standards before it reaches the end user.

Usage

This funnel excels in a wide range of laboratory applications. In organic synthesis, it allows chemists to add reagents dropwise to reaction vessels without disturbing the reaction mixture, thanks to the pressure‑equalizing vent that prevents sudden pressure spikes. In analytical chemistry, the graduated markings enable precise volume additions for titrations, standard preparations, and sample dilutions. The 24/40 joint is compatible with standard condensers, reflux adapters, and gas‑inlet manifolds, making the funnel a versatile tool for distillation setups, reflux experiments, and inert atmosphere work. The two glass stopcocks provide independent control of inlet and outlet streams, allowing simultaneous addition of multiple liquids or the isolation of the funnel when not in use. The funnel’s durable glass construction tolerates repeated heating cycles, so it can be safely used with hot liquids or placed in a drying oven for cleaning. Its clear design also facilitates visual inspection for contaminants or residues, ensuring that each addition is performed with confidence and accuracy.

Why Choose Us

Choosing Laboy means selecting a brand with a legacy of craftsmanship and scientific reliability. Each funnel is hand‑blown by experienced glass artisans, a process that yields a seamless, defect‑free vessel with superior structural integrity compared to mass‑produced alternatives. Laboy adheres to rigorous testing protocols, including pressure resistance, chemical compatibility, and dimensional accuracy, guaranteeing that the funnel performs consistently across diverse laboratory workflows. Our commitment to customer support extends beyond the point of sale; we provide detailed usage guides, troubleshooting assistance, and a responsive service team ready to address any concerns. Additionally, Laboy offers a limited warranty on all glassware, reflecting confidence in the durability of our products. By investing in Laboy glassware, laboratories benefit from reduced downtime, lower risk of contamination, and enhanced reproducibility of experimental results.

Key Features

• Hand‑blown borosilicate glass ensures chemical resistance and long‑term durability for frequent laboratory use.
• Pressure‑equalizing vent prevents back‑siphoning, protecting sensitive reactions from pressure fluctuations.
• 24/40 joint water top offers universal compatibility with standard lab adapters and condensers.
• Two precision glass stopcocks give independent flow control for complex addition procedures.
• Comprehensive after‑sales support and warranty provide peace of mind and reliable service.

FAQ

What types of chemicals can I safely use with this funnel?

The funnel is made from high‑quality borosilicate glass, which is resistant to most acids, bases, and organic solvents. It is suitable for aqueous solutions, organic reagents, and many corrosive substances, but users should avoid extremely aggressive fluorinated acids that can etch glass over time.

Can the funnel be used with hot liquids?

Yes. The glass can withstand temperatures up to 300 °C (572 °F) without cracking, making it safe for hot liquid transfers, reflux setups, and oven cleaning cycles. However, rapid temperature changes should be avoided to prevent thermal shock.

How do I clean and maintain the funnel?

After each use, rinse the funnel with the appropriate solvent (water for aqueous solutions, compatible organic solvent for organic reagents). For thorough cleaning, soak in a mild detergent solution, rinse, and dry with a lint‑free cloth. The stopcocks can be cleaned with a small brush and solvent to remove any residue.

Is the 24/40 joint compatible with standard laboratory equipment?

The 24/40 joint conforms to the widely adopted standard for laboratory glassware, allowing seamless connection to condensers, adapters, and other accessories that feature the same joint size. This ensures flexibility in configuring experimental setups.

What warranty does Laboy provide for this funnel?

Laboy offers a one‑year limited warranty covering manufacturing defects in material or workmanship. If the funnel develops a crack or defect under normal use within the warranty period, Laboy will replace or repair the item at no additional cost.