Braunschweiger Flammenfilter GmbH

Braunschweiger Flammenfilter GmbH is an international valve-manufacturing company employing more than 500 people at several locations worldwide. Under the PROTEGO brand we manufacture and distribute flame arresters, safety valves and tank accessories. Within our area of expertise we are the technology leader. We are available worldwide to our customers for consulting and to provide services. They rely on the products we make for the process engineering, petroleum, chemical and pharmaceutical industries as well as for the bioenergy sector. Our customers trust in the high development and quality standards we boast.

Company details

Industriestr. 11 , Braunschweig , D-38110 Germany

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Business Type:
Industry Type:
Water and Wastewater
Market Focus:
Globally (various continents)
Year Founded:

Today flame arresters (FLAMEFILTER®) are used for many industrial applications. They are recognised as a safe principle for engineered explosion protection. Making high demands as to sealing of valves is beneficial in terms of both environmental and explosion protection. Quality is manufactured.

PROTEGO® - Root Competences for Customer’s Benefit

Where standard products do not meet the requirements, designs are modified to suit special applications. Qualified advice leads to economic solutions. Maintaining a worldwide network of PROTEGO® subsidiaries and representations we are on site when we are needed.

PROTEGO® - Products for safety and the environment

Explosion protection with PROTEGO® valves and equipment prevents disasters. Worldwide purchasing, modern manufacturing facilities, permanent quality control and global communication guarantee high quality of products and services. With products supplied and services provided, we are committed to safety and the environment: PROTEGO® - I protect.

60 Years of Innovation – Flexibility – Quality – Performance – Service ... for Safety and the Environment

The motto of Robert Leinemann, who founded the company, has no alternative: Good technical ideas and sound workmanship are the basis for the success of a company

PROTEGO® - Three Generations of Family Business

Robert Leinemann (1954-1967); Hubert Leinemann (1967-2000); Christoph Leinemann (1992-2013).

Our well-trained staff, and our closeness to customers, are the doors to success. Permanent ongoing development and intensive research are required to obtain a low-cost and technically perfect product. The customer benefits from our results and can rely on well-engineered products and qualified services. Satisfying the customer is the objective.