Variable Reflux Distillation Head with Cold Finger & Glass Stopcock

Engineered for precise fractionating, this variable reflux distillation head integrates a high-vacuum glass stopcock for fine control over reflux-to-takeoff ratios. Fabricated from 3.3 borosilicate glass, it incorporates built-in cold finger condensers (straight or coiled variants). The standard design features identical left sidearm bottom cone and right drain cone joint sizes, with customizable right joint sizes available via order notes.

Key Features:

• Precise Reflux Ratio Regulation: Integrated high-vacuum glass stopcock allows smooth, granular adjustment of distillate takeoff versus reflux back into the fractionating column.
• Premium 3.3 Borosilicate Glass: Manufactured from high-purity borosilicate glass to deliver superior thermal shock resistance and chemical durability under continuous distillation.
• Straight and Coiled Cold Finger Variants: Choose between Type A / Type B (straight cold finger) or Type C / Type D (coiled cold finger) for optimized condensing efficiency.
• Matched Standard Joint Configurations: Features identical Left Sidearm Bottom Cone and Right Drain Cone joint sizes by default for reliable system integration.
• Customizable Right Joint Sizes: Supports bespoke configurations where the right drain cone joint size differs from the left; custom requests can be specified directly in order notes.

Need a grease-free solution for sensitive distillates? Check out our Variable Reflux Distillation Head with PTFE Stopcock