Chromatography Columns Plain with PTFE Needle Valve
- With Screw Type PTFE Needle Valve Stopcock.
- Manufactured from Borosilicate Glass.
- Printed in Anti Acid Blue/white Colour.
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CAT NO Effective Length(mm) Outer Dia. (mm) Pack Of 200 10 1 300 15 1 500 20 1 600 25 1 600 42 1 1000 50 1 1000 60 1
OVERVIEW:
GWSI Glass Lab manufactures plain chromatography columns with a PTFE needle valve from premium borosilicate 3.3 glass. Designed for versatile separation workflows, they deliver high thermal shock resistance, full chemical inertness, and hydrolytic resistance. Every column is I.S.O. DIN, NABL calibrated for consistent analytical performance.
HISTORY:
Plain chromatography columns with PTFE needle valves developed as a flexible alternative to built-in filtration designs, allowing researchers to customize stationary phases and flow rates easily. GWSI modernizes this practical format with borosilicate 3.3 durability, ceramic glass fusing, interchangeable ground joints, and autoclavable lab glass reliability.
SHORT APPLICATIONS:
* Pharmaceutical compound isolation and purification
* Biotech and analytical separation laboratories
* School, college, university, and educational institutes
* Industrial quality control and research labs
* Custom chromatography with adjustable flow control
MANUFACTURING PROCESS:
We melt high-purity borosilicate 3.3, form the column tube through master hand-blowing or automated molding, apply ceramic glass fusing to interchangeable ground joints, and complete controlled annealing to fully eliminate thermal stress.
TESTING PROCESS:
Every column receives manual polariscope stress testing for zero residual stress, followed by high-precision ISO, DIN standard verification — manual or automatic testing machine — and NABL gravimetric calibration where volumetric measurement applies.
PRINTING PROCESS:
Graduations and markings are applied by precision screening with ceramic glass enamels, baked in high-temperature kilns to permanently fuse the scale into the borosilicate 3.3 matrix so it never fades.
PACKAGING PROCESS:
We perform cosmetic sorting to filter out any blemishes, assemble the PTFE needle valve securely, and pack in heavy-duty double-wall boxes with shock-absorbing bubble wrap for safe export from Ambala, the Science City.
MAINTENANCE & SAFETY:
* Autoclavable lab glass: sterilize at 121 °C with the PTFE needle valve removed or fully open.
* Clean with non-abrasive detergents; protect interchangeable ground joints and PTFE surfaces from scratches.
* Confirm hydrolytic resistance before prolonged use with acidic or basic mobile phases.
* Store vertically in a stable rack away from direct heat sources.
* Inspect for polarization stress before high-thermal-shock cycles.