The history of LT GASETECHNIK

We are really proud of our products and our services. We believe in us, and obviously do the many clients who trust us. And not just today, but from the beginning, exactly since January 1st, 1971

L + T was established by engineers Friedhelm Ludewig and Heinrich Tillmann as „Ludewig & Tillmann Regel- und Sicherheitstechnik Gas” (that stands for “control and safety equipment gas“ with its headquarters in Dortmund-Barop. First there were designed and manufactured fittings and devices for the gas technology.

Shortly after the foundation in 1971 a production hall with 1,300 square meters and an office building with 600 square meters was bulilt on a 5,000 square meters property in Dortmund-Marten. Today, around 30 highly qualified employees are working there. L + T GASETECHNIK is now LT GASETECHNIK.

The history of LT GASETECHNIK


We help companies in finding alternatives for natural gas shortages, caused by the War Russia/Ukraine. We offer some online seminars on gas storage, lean air and natural gas substitutes.


Despite COVID-19, we can reach the previous year’s overall performance and maintain this high level. Projects for the energy transition, hydrogen economy, and gas mixers for world market natural gas mixtures, but also lean air production keep us busy. LT GASETECHNIK has been an AVPQ prequalified company since the end of 2021.


LT GASETECHNIK is also affected by the COVID-19 crisis, but we are getting through the year quite good and are even receiving some very nice orders. This is why we are looking with faith into the future.


The 40th gas mixer type advanced is successfully delivered
Handelsblatt, Stern and VDMA News report on LT GASETECHNIK


LT is launching a joint project with the German Aerospace Center (DLR) and the Karlsruhe Institute of Technology (KIT) with the participation of Forschungszentrum Jülich (FZJ)
Two more industrial gas producers include LT products in their standard supply catalog
MEP Denis Radtke and Holger Kunze, Director VDMA European Office, visit LT GASETECHNIK


A project which was funded by the German Federal Foundation for the Environment was completed successfully.
Very successful acceptance and commissioning of another high-performance system for a float glass plant in Thailand
National and international partnerships extended


Several gas companies add the extended LT product program to their standard supply catalog

Successful development and standardization of the gas mixer advanced


Delivery of five very different natural gas conditioners
LT broadens the scope of production to compact dome loaded pressure control units as well as other innovative solutions in the field of C&I and analysis technology.


Mr. Alfonso Castell is retiring and Mr. Alexander Carl Hanf successes him as Managing Director.


The 30th LT high duty station for generating a gas mixture from N2 and H2 goes into operation at Saint-Gobain’s float glass plant in Egypt


Jochen Weyer and Klaus Weyer take over 25% each of the KG. Klaus Weyer becomes the sole share holder of the holder company


Alfonso Castell is appointed as joint managing director


Horst Weyer takes over the shares from Renate Sandhof and becomes the sole proprietor


The management passes to the next generation: Klaus Weyer takes over. From then on the company orients itself towards international markets and focuses increasingly on large-scale gas related systems, a cornerstone of the company’s success


The shares of Friedhelm Ludewig are purchased by Horst Weyer


The company’s name is changed to L+T GASETECHNIK Klöpper-Waldmann GmbH & Co. KG. It continues to focus on gas technology systems


Lotte Lore Klöpper-Waldmann, her company shares are transferred to her heirs, Horst Weyer and Renate Sandhof. Both of them become managing directors and replace Friedhelm Ludewig in this role.


One of the company’s founders, Heinrich Tillmann, leaves the company. Lotte Lore Klöpper Waldmann becomes major shareholder of the company. Friedhelm Ludewig remains managing director.


The  “LTD-1” dome-loaded pressure regulator is launched


The company expands: New premises with a 1,250 m² production facility and 600 m² office space are built in Dortmund-Marten. The company moves into its own production sit


The product range is broadened with centralised gas installations and systems for regulating, dosing, measuring and controlling gas pressures and gas flows


The “THERMOMAT” flashback arrestor is launched. The first LT gas mixer goes into operation


Friedhelm Ludewig and Heinrich Tillmann found
LUDEWIG + TILLMANN oHG in Dortmund-Barop.
The company focusses on design and manufacturing of fittings and machines for the gas technology. One year later the company is renamed to LUDEWIG + TILLMANN Regel- und Sicherheitstechnik GAS – Schweißtechnik KG

The case of a client who purchased one of our gas mixers (serial no. 4) in 1972 and proceeded to forget all about it for 22 years has become a company legend. Why? The system was not readjusted or otherwise serviced for 22 years, so it worked reliably for almost 200,000 hours without interruption.
Or the case in which a 35-year-old dome pressure regulator is sent to us for maintenance and continues to do its job after the installation of the maintenance kit (to date only 5 years).

Our customers and our references are part of our history – do you know our extensive reference list with more than 100 customer-specific systems? Well-known names testify that we are dealing with a number of well-known customers for our systems; from a wide variety of industries and with a wide variety of requirements. We would be happy to send them to you, please contact us.

The result of this company history is the increased competence and experience of our engineers. We stand for the routine and safe handling of gas. This know-how, which has grown over the years, culminates in the claim LT GASETECHNIK – beyond standards.