Variable Reflux Distillation Head with Cold Finger & PTFE Stopcock

Engineered for high-purity fractionating setups, this variable reflux distillation head incorporates a chemically inert PTFE stopcock, enabling precise, grease-free regulation of reflux-to-takeoff ratios. Fabricated from thermal-shock-resistant 3.3 borosilicate glass, it eliminates the risk of distillate contamination from vacuum grease and prevents stopcock seizing. Available with straight or coiled cold finger variants, the unit features matched bottom cone and drain cone joints by default, with custom drain joint configurations supported via order notes.

Key Features:

• Grease-Free Reflux Regulation: Integrated PTFE stopcock delivers smooth, precise flow control without vacuum grease, ensuring zero lubricant contamination in sensitive distillates.
• Anti-Seizing & Chemically Inert: Impervious to harsh organic solvents, acids, and bases, preventing stopcock binding or freezing during high-temperature fractionating.
• Premium 3.3 Borosilicate Glass: Built from high-purity borosilicate glass to provide superior thermal shock resistance and high-vacuum stability under continuous distillation.
• Straight & Coiled Cold Finger Variants: Choose between Type A/B (straight cold finger) or Type C/D (coiled cold finger) to match required thermal surface area and condensing efficiency.
• Matched Standard Joint Configurations: Comes with matching Left Sidearm Bottom Cone and Right Drain Cone joint sizes by default; custom right joint sizes are available upon request in order notes.
• High-Vacuum Ground Joints: Precision-ground glass joints guarantee leak-tight sealing for atmospheric and reduced-pressure distillation processes.