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In-line eccentric flame arresters are designed for horizontal installation to achieve a lower pressure drop and avoid condensation on flammable gases that can condense at the lowest points of the installation. They are useful in biogas plants to avoid that the water vapor that contains the biogas from the digester can condense in the body of the flame arrester and be deposited in the lower part of the flame arrester, reducing its passage section. Its flat bottom prevents the accumulation of water, allowing gas to push the condesmands along the line. They can be installed to avoid detonations and/or deflagrations. They are usually installed together with sediment pots and traps that collect condensates from the line.

Our flame arresters comply with ISO 16852 standards, set out in the ATEX Directive 94/9 / CE. There are different types of flame arresters depending on the gas and the type of explosion. To ensure the integrity of the equipment to be protected, it is vital to correctly select the type of flame arrester. For your correct choice you must know:
  • The gas group of the mixture IIA, IIB or IIC
  • The origin of the possible ignition point and the distance to the flame arrester
  • Direction of the advance or the recoil of the flame


    The flame arresters capable of extinguishing a flame front confined in a gallery, which moves at a lower speed than sound, belong to this category. Therefore, this equipment must withstand significant mechanical and thermal energy. The maximum distance allowed between the ignition point and the extinguisher is 50 times the diameter of the pipe, and 30 times for the IIC (hydrogen) groups.


    When a deflagration is propagated through a pipe, its pressure and temperature increase until it reaches the autoignition temperature, at which time in addition to the advance of the flame a detonation occurs. They belong to this category the flame arresters capable of extinguishing a flame front, confined in a gallery, which moves at a speed greater than that of sound, thus having the character of a detonation. The mechanical and thermal energies in this case are more critical, and must withstand high solicitations.