90 years of experience for your safety
We develop and produce exclusively in Germany. With modern production facilities and now 70 employees, flame arresters, valves and other special fittings are manufactured. Our worldwide network of representatives and maintenance partners ensures that you receive advice and support tailored to your needs.
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Typical KITO® flame arrester elements, which prevent the propagation of flames and explosions (both deflagration and detonation) in all kinds of tank farms. Our tested and certified tank accessory satisfies the current version of EN ISO 16852, which includes safety regulations and environmental protection.
Venting lines on tanks, vessels and pipelines that enable an on-going exchange of gases, must be protected with explosion-proof devices. These are called end-of-line deflagration or endurance-burning flame arresters (with the appropriate design). They enable tanks to breathe out flammable gases and breathe in fresh air unrestricted in total safety. A weather hood made of acrylic glass and strainer prevents the penetration of rain, dirt and foreign objects. Weather hoods made of metal are also available.
The KITO® flame arrester element prevents flashback in the vessel. Simple versions of this are the KITO® ventilation hoods (fig. 1-3). The KITO® endurance burning type flame arrester is able to prevent a continuously burning flame from flashback into the vessel (fig. 1 and 2). In the event of a fire, the acrylic glass cover burns immediately and completely or the metal cover swings open. This enables the high temperature created by the burning gas/air or product vapour/air mixture at the flame arrester element to escape into atmosphere. In order to limit wasteful and polluting vapour losses, KITO® valves are used. The flame arrester works on the same principle as a ventilation hood, but has additional valve inserts integrated to regulate pressure.
There are KITO® valves for pressure, for vacuum (fig. 4) or as combined pressure/vacuum valves (fig. 5). In many cases, where incoming and outgoing gas flow rates are similar, we recommend a combined KITO® breather relief valve. However, where gas flow may strongly differ (e.g. on large tanks with differing pump flow rates for filling and discharging), the installation of separate KITO® valves is usually more economical.
We are at your disposal to calculate the number and size of valves in line with the applicable regulations required for your needs. For this purpose we require information about the tanks, the permissible pressures, the output of the pumps connected as well as the specific features of the product and relevant standards.
In the event of explosive gas-air mixtures igniting in a pipeline, a (stable) detonation can develop from a deflagration under certain instances. The impact of such a detonation is considerable with greatly increased pressure and flame speed; our KITO® detonation flame arresters are specifically designed for such scenarios. The fitted KITO® flame arrester element remains functional and arrests the flame front following the pressure wave. We can also develop certified devices for an unstable detonation (although these are not considered according to German regulations).
The selection of suitable in-line detonation flame arrester is based on the classification of the required medium in explosion group classes. Our range encompasses KITO® devices for all explosion groups in various designs (fig. 6 onwards). Usage is limited to pressures
Dry types of detonation flame arresters can also act as endurance burning flame arresters. For this purpose a pipe of a pre-determined length, based on the nominal diameter of the pipe, has to be connected to the outlet flange of the arrester. This installation replaces the ventilation hood (fig. 2). In some special system designs, e.g. installation in torch lines or thermal incineration plants, the incorporation of one or more thermal sensors on the KITO® flame arrester element is mandatory for identifying an outbreak of fire. An appropriate circuit must be connected that triggers emergency measures against a potential ’stabilised burning’ caused by any incoming mixture.
If explosive gases ignite in a pipe then the explosion initially starts as deflagration characterised by relatively low pressures and flame speeds. KITO® in-line deflagration flame arresters (fig. 13 to fig. 16) are installed to prevent a flame spreading to other parts of the system. In contrast to detonation arresters, there are limits for the length of pipe between any possible source of ignition and the flame arrester. Where there are special conditions, e.g. installation in torch lines or thermal incineration plants, the incorporation of one or more thermal sensors on the KITO® flame arrester element is mandatory for identifying an outbreak of fire (fig. 14). An appropriate circuit that triggers emergency measures to prevent a potential stabilized burning must be connected.
We have specifically developed KITO® valves for rail tank cars with a particularly low profile. There are versions for pressure, pressure/vacuum and combinations with a gas compensation coupling (fig. 17) as well as with KITO® flame arrester elements. In addition, devices without flame arrester elements and special designs for corrosive media are included in our range (fig. 18). We also manufacture special flame arresting devices for installation in tanks and road tankers (fig. 19). As well as detonation flame arresters, pressure, vacuum and combined valves are also available. These devices comply with the requirements for tanks according to ADR and RID.
KITO® deflagration, detonation and endurance burning flame arresters comply with the international standard EN ISO 16852. They have all been systematically typeapproved and are supplied with a CE declaration of conformity. They therefore fully comply with the European directive 2014/34/EU (ATEX 100). The German Code of Practice 967 issued by VdTUEV and the German Ordinance on Industrial Safety and Health are the German implementations of the European Directive 99/92/EG. They clearly stipulate the necessity for various tank flame arrester.
A biogas plant is primarily used for the production of biogas by fermentation of biomass. Biogas plants are important producers of electricity and heat from renewable energies. Biogas is a gas mixture consisting mainly of methane and carbon dioxide as well as steam and various trace gases. One of these is the equally flammable gas hydrogen sulphide. The average composition of the two main components in biogas can vary from 50 - 75 vol. % for methane and 25 - 45 vol. % for carbon dioxide depending on the input materials and the production process. Biogas is a flammable gas that can form explosive mixtures when mixed with air. An explosive mixture is present if the concentration of biogas in the air is between 6 vol. % (LEL) and approx. 22 vol. % (OEL).
To avoid an explosion, one of these components must be removed or prevented by suitable measures. In the event that the formation of explosive mixtures or their ignition cannot be prevented, explosion propagation must be reduced to an acceptable level by appropriate protective systems such as flame arresters.
KITO® recommends due to the lack of inertization during the commissioning as well as the air supply during start-up and shutdown process to classify the interior of the fermenter in zone 1.This means that the pressure relief and vacuum valves on the vessel must be explosionproof and meet the requirements and conformity in accordance with EN ISO 16852 or EU Directive 2014/34/EU.
1. Tank farms (see page A 01.1 N – A 01.5 N)
2. Process plants
3. Thermal treatment plants (see page A 03.1 N)
4. Loading and unloading process as part of logistics (see page A 04.1 N – A 04.3 N)
5. Vapor recovery units (VRU’s)
6. Components as safety part of devices
7. Protection of other plants – not illustrated- (see page A 07.1 N – A 07.2 N)