Welcome to ROBU® Glasfilter-Geräte

VitraPOR® Sinterfilter & Laboratory Glassware for preparative and analytical works in the chemical, pharmaceutical and laboratory field.


NEW!!! Sintered filters made of pure quartz glass

As the leading manufacturer of VitraPOR sintered filters, we are expanding our product range with quartz glass filters. From now on you can order standard quartz glass filter discs here. Special designs and intermediate sizes are available on request.

Quartz glass is one of the most demanding of all glasses for use in technical applications. The single-component glass consists of pure, amorphous silicon dioxide (SiO2). Due to its exceptionally high resistance to heat, low thermal expansion and excellent thermal shock resistance, quartz glass is used wherever other glass materials reach their limits.


Sieve Plate Funnel (Buechner Funnel) for Membranes or Paper Filter

Our VitraPOR Buchner funnel made of pure borosilicate glass 3.3 with the renown properties like chemical and high temperature change resistance.

A special type of our funnel is equipped with a sieve plate. Contrary to the classical filter funnel with a sintered VitraPOR glass filter disc, it is fitted with a glass disc with approx. 1,8 mm wide slits. This disc is designed for very coarse filtration processes or to support round membranes or paper filters which facilitates to take out the filtrate and to clean the funnel.

The sieve plate is produced by us in a novel manufacturing process allowing special geometries, slit or bore patterns and sizes when required.

See here our available standard sizes.



Welcome to ROBU Glasfilter

VitraPOR® is the brand name for a complete line of sintered glassfilter elements made of borosilicate glass 3.3 and quartz glass.

ROBU® sintered glassfilters meet the internationally established standards for porous sinterfilters according to ISO 4793 and borosilicate glass 3.3  according to ISO 3585 as well as the American Standard ASTM E 128 and the British Standard BS 1752.

Standard VitraPOR® Sinterfilters and Laboratory glassware - we are happy to work together with you in designing the best solutions for all your individual needs - quickly and effectively.

ROBU® becomes part of the QSIL group of companies

Materials specialist QSIL is growing again and expanding its portfolio in the quartz and special glass sector by acquiring ROBU, the leading manufacturer of sintered glass filter elements and glass filter devices.
The QSIL Group is an innovative, internationally active materials specialist for the development and production of a broad portfolio of high-performance materials. Among other things, QSIL specializes in the production of high-purity quartz glass, special glasses, technical ceramics and high-performance metals.
With more than 1,000 employees in Germany, The Netherlands, England and China, QSIL generates annual sales of over 200 million Euros.
QSIL has a globally diversified customer base, including large blue chip clients from Europe, Asia and America.