Description
Replacement PTFE spindle Economy is a spare spindle component designed for laboratory stopcocks and burette valves requiring a 0–3 mm bore. It features a new sealing system combined with over-rotation protection to maintain reliable shut-off and smooth adjustment during titration and volumetric work. Manufactured from PTFE, the spindle offers chemical resistance suitable for common laboratory reagents and solvents. Supplied as one piece with a net weight of 0,012 kg, this spare part supports straightforward maintenance of existing valve assemblies. The Economy series spindle from manufacturer Witeg is intended for routine analytical and teaching laboratories where consistent flow control is essential. The integrated sealing arrangement helps preserve leak-tight performance, while the over-rotation safeguard reduces the risk of mechanical damage during frequent use. Ideal as a direct replacement when the original spindle shows wear, it restores controlled passage in the 0–3 mm range without altering the geometry of compatible stopcock bodies. A practical choice for keeping burette and valve systems operational in quantitative chemistry workflows.
This article is part of Viscometers, in Density & viscosity measurement.
Key features
- Pack size: 1 pc
- Type: Replacement PTFE spindle
- Series: Economy
- Material: PTFE
- Bore: 0–3 mm
- Sealing: New sealing system
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Questions about Spare PTFE-needle valve ''Economy''
What is this article?
Spare PTFE-needle valve ''Economy'' is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Viscometers, inside Density & viscosity measurement, in Lab instruments.
A capillary viscometer times the flow of a liquid through a tube. A rotational viscometer twists a spindle in the liquid. Both need a stated temperature. Kinematic and dynamic viscosity are different numbers. The capillary size has to put the flow time in the range the method allows.
Density is mass divided by volume. A hydrometer floats at a depth that depends on the density of the liquid. A pycnometer is a vessel of known volume that is weighed full. Viscosity is the resistance to flow. A capillary viscometer times how long a volume takes to fall through a tube. Both measurements need a stated temperature, because liquids change density and viscosity as they warm. The units trace to the BIPM and to NIST.
Which category should I open next?
The category is Density & viscosity measurement. The sub-category is Viscometers. The catalogue is Lab instruments.
Shelves beside this one are Hydrometers and Density meters & pycnometers.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.