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PROTEGO®
Excellence in Safety and Environment
A man works at a desk with dual monitors displaying 3D CAD models of a mechanical assembly, using a keyboard and control device.

The journey of innovation and excellence is showcased through significant milestones, highlighting continuous advancements and establishing PROTEGO® as a technology leader in the industry.

Innovative pipe joint technology ensuring secure and efficient connections in industrial systems.

First approval

of a 2" Detonation Flame Arrester for any hydrogen/oxygen mixtures and increased pressure

Outdoor testing of explosion safety technology, showcasing innovation in protecting industrial pipelines.

First approval

of an acetylene Flame Arrester for the nominal size Diamètre nominal The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. DN 500.

Innovative solutions in industrial storage tanks with advanced safety valve technology for optimized performance and protection.

Measurement of the tank breathing capacity at a real storage tank

Validation and improvement of design models based on full-scale measurement data.

Outdoor testing setup for industrial innovation, featuring large-scale pipes and advanced measurement equipment.

World's largest Deflagration Flame Arrester

approved for explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIA for pipelines with a size of DN 1000 for an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of 200°C

A person operates a microscope imaging system beside a monitor showing a magnified pattern of crisscrossing lines.

Commissioning of the MESG Laboratory

A large horizontal industrial pressure vessel sits inside a factory hall, with a platform and overhead crane above it.

Start-up of the flow test rig 

for high flows

A modern office building labeled “PROTEGO TECHNOLOGY CENTER” under a blue sky, with a fenced parking area in front.

Opening of the PROTEGO® Technology Center

Two stainless steel valve assemblies are mounted on large industrial piping inside a metal-lined chamber.

Market launch of In-Tank Valves

PROTEGO® ITV

Diagram of an explosion protection system showing vapor flow in a pipe from an ignition source toward a plant, with labeled control and extinguishing units and arrows for flashback direction.

Market launch of PROTEGO® ExU

The first controlled in-line deflagration flame arrester Arrête-flammes antidéflagration en ligne A deflagration flame arrester is designed to prevent the transmission of a deflagration. An in-line deflagration flame arrester is equipped with a pipe connection on both sides.

Several large gray industrial valve units sit on wooden pallets outside a PROTEGO facility under a blue sky.

Market launch of the world’s highest flow capacity pilot-operated valves

World’s first in-line liquid detonation flame arrester

for higher temperatures

A large circular industrial component with a radial metal grate sits on a workshop floor, with a worker in the background.

World’s first in-line detonation flame arrester

for H2/O2 mixtures for higher pressure

A large white cylindrical industrial vessel sits outdoors, secured with orange straps among shipping crates.

World's largest in-line deflagration arrester

approved for explosion group IIA (NEC group D) – DN 1000 (40”) flange connection

Close-up of an industrial pipeline with a large red flanged housing attached to a shiny metal pipe outdoors at a plant site.

World’s largest in-line detonation arrester

approved for explosion group IIB1 – DN 1000 (40”) flange connection

A technician operates a test rig with multiple pressure gauges while a large red industrial valve is mounted on the bench.World’s first in-line detonation arrester type

Approval of hydrogen deflagration and detonation arresters

A bright explosion flash fills the frame, with glowing white and purple light and sparks bursting upward.

World’s first in-line detonation arrester type

tested and approved for carbon disulphide

An outdoor industrial test site with multiple large pipelines, valves, and equipment arranged along a paved yard bordered by trees.

Development of first static, endurance burning flame arrester

for ethanol and ethanol based fuels

A large red industrial pressure-relief device is bolted into a pipeline on a metal platform at an industrial facility.

Development of the first detonation arresters

for acetylene and ethylene oxide

A fireball and thick smoke erupt beside a long elevated pipeline at an outdoor industrial test site.

Development of first static type, endurance burning rated flame arrester

for explosion group IIB3

An engineer uses a stylus at a desk while three monitors display exploded-view 3D CAD models of a red mechanical component.

Development of flame arresters

for elevated pressures and temperatures

A small open-plan office with several people working at desks surrounded by multiple desktop computers and paperwork.

Manufacturing the broadest range

of type approved flame arresters Flame Arresters A flame arrester, deflagration arrester, or flame trap is a device or form of construction that will allow free passage of a gas or gaseous mixture but will interrupt or prevent the passage of flame. globally

A technician monitors a large industrial piping system with a control workstation inside a test facility.

Introduction of ATEX quality assurance for flame arresters

Our flow test facility was renewed and has been technologically improved ever since

A worker on top of a large storage tank lifts the lid of a red circular hatch or vent.

Development of low pressure valves

with full lift Course Lift is the actual travel of the valve pallet from the main valve out of the closed position. type pallets (PROTEGO® 10% Technology)

An outdoor test setup shows a long metal pipe on stands with cables and a clear plastic bag attached at the far end.

Enhancement of the effectiveness of detonation arresters

through the pre-ignition effect and shock-wave guide tube

Two technicians operate a large industrial testing machine, with one in red coveralls adjusting the controls while another observes.

The quality management system is certified under ISO 9001

A worker measures a large circular metal plate beside a yellow grid-like frame in an industrial workshop.

Development of integrated flame arresters

for blowers and vacuum Dépression Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. pumps

A red industrial cylindrical unit with a “PROTEGO” flame logo label is shown in a workshop setting.

First approval for hydraulic flame arresters

Historical image of engineers working on innovative flame filter technology, showcasing advancements in safety and engineering.

Approval for deflagration flame arrester

with temperature monitoring

A man in a white lab coat discusses a document with two colleagues in an office, while another person works at a drafting table in the background.

Development of our own research/testing center

or flame arresters, up to 12” in size

An industrial valve on large outdoor piping releases a plume of white vapor near a facility at dusk.

Development of pilot-operated valves, bottom outlet valves and safety vent valves

A black-and-white photo shows two men in suits examining industrial equipment beside a large circular device, with one holding a handheld instrument.

Approval of hydrogen deflagration and detonation arresters

A man in a work coat and cap uses a hand tool at a workbench with metal parts and machinery in a workshop.

Our first flow measuring system was put into operation

A display of industrial flame arresters and valves arranged on a table in front of a banner reading “Braunschweiger Flammenfilter Leinemann & Co.”

The world’s first endurance burn proof diaphragm valve was put on the market

Development and patenting of the first detonation arrester Arrête-flammes antidétonation Flame arrester designed to prevent the transmission of a detonation. for liquid products

A vintage black-and-white workshop photo shows several workers gathered around a large worktable with tools and metal parts.

First construction phase of Braunschweiger Flammenfilter in Bienrode, Germany

A vintage workshop scene shows workers at a long bench with several large cylindrical metal parts lined up against a brick wall.

The world’s first tank vent with integrated flame arrester

rated for endurance burning Endurance burning Stabilized burning for an unlimited time. is developed

A black-and-white sign with the PROTEGO flame logo reads “Braunschweiger Flammenfilter Leinemann & Co.”

Robert Leinemann establishes Braunschweiger Flammenfilter

Development of Tank Equipment, e.g. Floating Suction Units and Floating Roof Drainage Systems

Sepia-toned portrait of an older man in a suit looking off to the side.

The world’s first detonation flame arrester

developed by Robert Leinemann is patented

PROTEGO® Technology Center

PROTEGO® Technology Center: development, validation and application testing for flame arresters and tank safety

PROTEGO® Test Site

PROTEGO® Test Site: full-scale testing for flame arresters and tank venting—validating performance, safety and standards compliance for explosion protection.

PROTEGO® Laboratory

PROTEGO® Laboratory: in-house R&D and testing for flame arresters and tank safety—materials, performance validation and application-specific solutions.

Contact R&D Department

Picture of Tom Gutte
Tom Gutte

R&D Department

+49 (5307) 809 385