Burette Glass 50ml Rotaflow Stopcock

This 50ml glass burette has a Rotaflow stopcock, which makes titrations smoother and easier to control. The Rotaflow valve replaces the fiddly traditional glass key with a smooth-turning, grease-free PTFE key that doesn't seize or leak. Bold, permanent graduations on the clear glass column let students, researchers and technicians control delivery down to the last drop without tiring their hands.

Key Features

• Rotaflow valve: A PTFE screw-thread stopcock gives smooth, fine control over single-drop dispensing, without messy grease.
• Leak-proof and non-seizing: Traditional glass keys can jam or leak over time. The Rotaflow stopcock is chemically inert and non-stick, and needs no maintenance.
• High-visibility 50ml scale: Sharp, durable, high-contrast graduations across the full 50ml capacity make meniscus readings quick and accurate.
• Borosilicate glass: Heavy-walled construction that withstands thermal shock and resists corrosive acids, bases and common laboratory solvents.

Product Specifications

• Capacity: 50ml
• Stopcock type: Rotaflow (screw-thread PTFE needle valve)
• Material: High-transparency borosilicate glass
• Lubrication required: None (self-lubricating PTFE)
• Application: Quantitative chemical analysis, academic training, acid-base titrations and precise liquid measurement.