Archive for June, 2016

How to fit a flexible hose From Leku-Ona we give you a few key pieces of advice on how to correctly measure and fit a flexible hose

If a few weeks ago we issued the keys to knowing what kind of hose should be fitted to each machine, today we share a number of essential aspects to be taken into account when fitting the flexible hose.

General aspects to be taken into account:

  • When the flexible hose is in use, its length can vary from +2% to -4%. Take care to ensure that the length of the flexible hose is not equal to the distance to be connected and that it is working in traction mode.
  • Do not bend the hose into a radius smaller than indicated on the characteristics table; this will prevent excessive fatigue and/or reductions in flow through the hose. If excessively curved, the hose reinforcement may be prevented from working uniformly, thereby weakening its properties.
  • Each installation must also be fitted with the most appropriate terminals, thereby avoiding overly small or large curves and making for easy maintenance of the installation. If the hose is fitted in a position where it could come into contact with metallic parts or situations of friction, it must be fitted with plastic or metal protection (Protecplast or Protecmuelle).

The flexible hose must not be exposed to direct heat. If it is, it must be protected using Protecfuego


How to measure the hose

According to the DIN and SAE standards, flexible hoses can vary in length from +2% above size to -4% below size, depending on the working pressure. It is therefore advisable to consider this variation in evolution of the final hose length. On the other hand, a tolerance of +/-3% must be observed in the length obtained.


Relative angle for terminals

In the case of hoses with 2 bends the relative angle between terminals must be determined (tolerance +/-3%). In the graph we indicate the most common positions and their angles with four letters (A-B-C-D).


How to fit the hose

The flexible hose should work between the theoretical pressure limits and the bending radius according to the tables indicating such data. The hose must not be twisted and its length in comparison to the terminal must be at least six times the tube diameter.

The terminal type used should reduce the number of bends in the hose to a minimum. In the graphs we give examples of right and wrong connections.


Chains and safety clamps

Finally, one very important element to consider when installing the hose is safety, both of the people fitting it and of the installation itself. Thus, to prevent potential disconnection of the hose, it is highly advisable to install a system consisting of a cable, chain or safety clamp in order to retain the hose and thereby prevent causing harm and damage to the installation.

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More information:

If you would like to receive advice on how to fit flexible hoses or information about the LOHT hydraulic hose, please get in touch with us by calling | Tel.: 34 943 74 34 50 or by writing to | Email:

Leku-Ona Global Solutions launches a Youtube channel with videos about all the group’s companies The aim is to show the activity, installations and human capital of Leku-Ona, MKL, Urtzinox and Bostak.

logoyoutubeokLeku-Ona Global Solutions, in its effort to show its processes, services, installations and professionals with total transparency, has launched a Youtube channel, where you can find audiovisual items about the group’s different companies, such as  Leku-Ona, MKL, Urtzinox y Bostak.

In addition to the corporate video that explains in a very original way its complete range of solutions for industry, the Youtube channel by Leku-Ona Global Solutions also shows the work processes for different solutions, such as for example pipe bending.

Likewise, the videos have been inserted in the different websites of the companies that form the group, in order to offer another perspective of the daily activity at the new corporate installations that Leku-Ona Global Solutions has in Itziar – Deba.

Visit Youtube channel of Leku-Ona Global Solutions.

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