We stand for correct consultation, good service and comprehensive care in the field of sealing technology.

Everything made by one company
We repair and optimize your mechanical seals as well as agitators up to 6,3 t.
Most advanced machinery
Our manufacturing site offers almost 50.000 sqft, equipped with modern and the most advanced machinery.
We offer quickest lead times
We offer quickest lead times, supported by engineers, designers and controlled by quality departments.

Product Summary

Mechanical Seal

Mechanical Seal Support Systems

Carbon Graphite Seals

International Delivery

STB, a global partner for mechanical seals and seal support systems 
We would like to invite you to learn about our mechanical seals, cartridge seals, component seals and mechanical seal support systems. In accordance with our name, we stand for engineering at its best a comprehensive service and quickest possible lead times connected with the highest quality levels, made in Germany. Our company is dynamical and we consider us to be a very innovative cooperation, bringing you the best solutions in terms of mechanical seals for upgrades or first orders .
STB designs and manufactures mechanical seals and special seals for gas and steam turbines, compressors (especially rotating piston, screw-, centrifugal compressors), pumps, mixer and agitators an many other applications where fluids, gases or steam need to be sealed. We machine parts up to 750 mm diameter and seal faces up 650 mm. Due to advanced manufacturing machines with more than 8 axis technology, we are able to offer the shortest lead times for new designed and produced parts. All of our machined seal faces are used in our component-, single- and double cartridge seals. We do repair of all mechanical seals in our headquarter at Berlin, due to the advanced technology we have here in use. A repair made by us will be tested before delivery to ensure the best possible quality. We have several test rigs, such as static test rigs for mechnaical seals according to API testing methods, helium test rigs for metal bellow seals, gas test rigs for mechanical dry gas seals and dynamical test rigs for horizontal applications (up to 16.000 RPM) and vertical test rigs for mixer and agitator seals with shaft diameters 40- 180 mm and special shaft sizes.  While having the best logistic conditions with our partner, you will not pay more for transportation compared to your local provider. Our aim for the repair of mechanical seals is that you will not notice a difference in performance compared to a new seal.