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The advantages of installing flexible stainless steel hoses At Leku-Ona, we custom manufacture flexible stainless steel hoses for our clients

For years, Leku-Ona has specialised in products and fittings for low, medium, high and very high pressure hydraulic oil systems. This is why flexible stainless steel hoses have become the best ally for tackling projects with very special characteristics in extreme conditions, which is what usually happens in sectors such as the machine tool, maritime, steelworks and farming industries, to name a few.

At our site in Itziar (Deba), we offer corrugated hoses without mesh, or with one or two layers of mesh. They can withstand temperatures of -270 ºC to 600 ºC and compensate for the thermal expansion or contraction in the hose system.

These kinds of hoses are also resistant to fire, humidity, abrasion, penetration and damage which may arise in the environment where they are being used due to their excellent anti-corrosion properties and their high physical strength.

Nevertheless, this resistance does not prevent them from being tailored to places and areas which are difficult to access, which is why they have come to play an important role in all kinds of industrial applications.

At Leku-Ona Global Solutions, we custom manufacture flexible stainless steel hoses for our clients, personalising the product as much as possible so that it meets the specific needs of each client and satisfies the characteristics of each project.

More information:

If you would like to receive advice on how to fit flexible hoses or information about them please get in touch with us by calling | Tel.: 34 943 74 34 50 or by writing to | Email: leku-ona@leku-ona.com

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.

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@leku-ona.com

8 tips for selecting the correct hydraulic hose Listed below are the decisive factors involved when selecting the correct hydraulic hose depending on each application

We at Leku-Ona have a wide variety of hoses (for oil, paint, hot water, very high-pressure, etc.) designed to provide the ideal solution for each particular situation. The installation type, the working temperature, chemical resistance, etc, are all decisive factors when selecting the correct hydraulic hose according to the case in question. For that reason, we at Leku-Ona wish to offer you several tips to consider when selecting the ideal hose.

1.Type of installation

The selection and installation of a hose is always conditional on the pressure of the circuit to be connected, working cycles, whether continuous or using a water hammer, the interior diameter of the hose and the type of fluid to be used.

2. Working pressure

According to standards UNI ISO, DIN and SAE, the recommended working pressure ratio is 1:4.

3. Water hammer

A flexible hose that can increase the safety factor is a must in installations where the pressure cycles can undergo sharp increases. By contrast, a minimum safety factor is sufficient in cases where there is an occurrence of mild bumps or none at all.

4. Working temperature

The working temperature indicated on each type of flexible hose is the maximum for the fluid that passes through it (with higher temperatures tolerated for short periods of time).

Constant work at the maximum temperature reduces the hose’s service life.

5. External temperature

Heat emissions or excess cold in the proximity of the flexible hose could damage the external coating and the reinforcement, with a negative effect on its life.

6. Volumetric expansion

According to national and international standards.

7. Gaseous fluids

Care must be taken when selecting the hose for high pressure gaseous applications as well as with chemical facilities. However, in this case, it may be a good idea to protect the hose to prevent any accidental breakage. The safety coefficient should be raised.

8. Chemical resistance

LOHT hoses are resistant to the effects of ozone and sunlight, other atmospheric agents, water and oils. Please contact our technical office for any queries related to a particular type of use.

Paying attention to these eight aspects ensures the correct adaptation of the hydraulic hose to the needs of the machinery and its intended use, extending the life of both elements. Please do not hesitate to contact us for any queries you may have and allow us to offer you the right solution for your specific case.

Some of the features of Leku-Ona’s LOHT hydraulic hoses

Manufactured to SAE, DIN AND EN standards.
Applications: oil, paint, hot water, etc.
Assembly Certified by Bureau Veritas with stainless steel or steel reusable and pressed terminals
Terminals and adapters in steel and stainless steel with DKO, BSP, BSPT, JIC, ORFS threads. We also manufacture terminals and adapters according to specific plans

Ciocca Flanges THE WIDEST RANGE OF FLANGES INTRODUCED BY CIOCCA

Leku-Ona is the distributor for Spain for CIOCCA S.P.A. an expert in the production of SAE and CETOP Flanges since 1969. Made in carbon or inox steel, CIOCCA’s broad and precise product range is particularly suitable for high-pressure hydraulic transmissions, where pump-shot and oil-hammering can severely damage the components.

CIOCCA manufactures flanges for pressure and suction pumps made in steel or aluminum with the highest standards, as it is an ISO 9001:2008 certified company. Material is also tested in conjunction with recognized bodies, such as: RINA, Lloyd’s Register of Shipping, ABS and Det Norske Veritas

CIOCCA

CIOCCA is specialized in the manufacturing of SAE and CETOP Flanges. A consolidated know-how with the best manufacturing technology. Made in carbon or inox steel, these flanges can work at a maximum working pressure of 6000p.s.i. Material certificate are available for all the product range. On request, certificates can be supplied for custom built applications. Manufacturing according to drawing is also possible.

FOR MORE INFORMATION:

Please contact us at:

LEKU-ONA | T +34 943 74 34 50 | E leku-ona@leku-ona.com

CATALOGUE

For more information about our product range, you can download our Catalogue here

RANGE OF PRODUCTS

Tubes with high corrosion resistance Tubes galvanized and painted with polyester paint,

Tubes with high corrosion resistance for environments like offshore wind energy galvanized and painted with polyester paint with high mechanical strength and to ultraviolet rays.

The tubes without welding galvanized and painted with polyester paint, are particularly suitable for hydraulic and pneumatic applications requiring high resistance to environmental corrosion.

Besides zinc, the additional layer of polyester paint gives the tube a high mechanical strength (erosion, etc.) and ultraviolet rays at a facility located outdoors.

The results obtained in testing in salt spray chamber the curved excess of 1000 hours without appearance of white rust (zinc):

TECHNICAL CHARACTERISTICS

1) TUBE

Tube without welding galvanized and painted with polyester paint
Norma EN 10305-1/4
Acero: E235 +N
Available from 6mm to 42mm in bars 6m

2) ZINC LAYER

Electrolytic zinc layer of white passivation (blue) according to EN-ISO 2081: 2008.
Passivation: Free Chromium VI in accordance with EC Directive 2000/53 / EC.
Zinc metal layers 8, 12, 25 and other

3) COAT OF PAINT

Organic paint. RAL 9005 satin polyester.
Coat of paint from 50 microns to 100 microns with tolerance – / + 20 microns
Resistance tests in salt spray chamber curved areas exceeding 1000 hours without the appearance of white rust (zinc)
High resistance to UV rays
Resistant to chemical agents
Mechanical characteristics: excellent adhesion and flexibility, which allows small radii bends.
Available colors: all RAL (to the customer’s choice)

APLICATIONS

Driving oil in hydraulic and pneumatic installations with demand for high corrosion resistance:

Hydraulic and pneumatic applications
Offshore Wind Energy
Mobile cranes
Civil Works Construction Machinery
Agricultural Machinery

Hoses protectors Safe-Spiral ASTA HOSES ROTECTED BY antistatic spiral

Safe-Spiral ASTA is a 2-coloured (black/green) permanently antistatic spiral which is designed for underground mines and other special environments that demand surface conductivity, like explosive surroundings

Safeplast specializes in producing high-quality plastic spirals and textile products for many type of hose and people protection. We also have a wide selection of hose bundling straps. Our products are designed to meet the requirements of machine and equipment manufacturers.

SOME TECHNICAL SPECIFICATIONS

LENGTHS:

Available only in coils (25 / 20m / 15m)

COLORS

Black surface, green interior

MATERIAL

HD polyethylene +conductive thermoplastic compound

Safe-Spiral ASTA is available in following diameters:

safeplast_spa_TABLA_ENG

SPECIAL COLORS

Moreover, there is possibility of special colors. Prices depends on the total quantity and also delivery time.

Safe-Spiral_new-colors1-300x199

New Flat-faces FASTER FFHP Safety rescue tools, power packs, high pressure special tools and industrial equipments.

A new FASTER product special for especiales para safety rescue tools, power packs, high pressure special tools and industrial equipments.

GENERAL TECHNICAL FEATURES

• Mate1000 Zinc Nickel Plating: 1000 h NSS to red corrosion appearance.

• Polyurethane and NBR seals.

• Automatic safety sleeve to prevent accidental disconnection.

• Connection system: Push to connect.

• Disconnection system: Rotate and pull back the female safety sleeve.

• Locking balls mechanical connection.

• Interchangeable with other products available on the market.

• Not interchangeable with standard ISO flat-face.

• Max WP declared on the product, thanks to a yellow label.

• Safety factor 3:1.

AVAILABLE SIZES&THREADS

Other special adaptor threads on request

RATED FLOW

CONNECTED: MAX WORKING PRESSURE & MIN BURST RESISTANCE

MALE: MAX WORKING PRESSURE & MIN BURST RESISTANCE

FEMALE: MAX WORKING PRESSURE & MIN BURST RESISTANCE

New treatment of connectors DIN2353 RESISTANCE TO 3000 HOURS TO SALT SPRAY TEST WITH THE NEW TREATMENT

Leku-Ona offers connectors DIN2353 manufactured and treated with the new coating processes that offer high resistance to salt spray. Since 2010 we have developed a research process that was based on the use of treatment with 320 A3C resistance. This process evolved into A3B (CrVI-free) and then to ZnNi (720 hours). Currently, it has begun to implement a new treatment called ZnNi NEW which is giving us high performance corrosion arriving at 3000 hours

APLICATIONS.

Whenever a high corrosion resistance is required
Temperature changes do stress additionaly

ADVANTAGES

High corrosion resistance of the coating and base material
Capable for flaring and bending
Log term protection, even under thermal stress
High availability
Low maintaining costs within the application

TECHNICAL DETAILS

ZnNi_01_ENG

COMPARISON OF LAYERS

This chart shows a comparison of the type of treatment in the various processes A3C, A3B and Zn / Ni

SALT SPRAY TEST

Description:

The following pictures indicate the corrosion resistance of Volz Zinc-Nickel
plated parts with sealer
Within the galvanisation process, these parts got handled in a drum

Indication of corrosion:

Parts with assembled nuts show red rust after 1.872 hours
This is a forced result as the salt water couldn‘t disappear at this point
Other parts, where the salt water was able to disappear (as required by the ISO
9227:2006), show red rust within the band of 3.072 / 3.216 / 3744 hours

168 HOURS

ZnNi_03

1032 HOURS

ZnNi_04

2064 HOURS

ZnNi_05

3192 HOURS

ZnNi_06

5280 HOURS

ZnNi_07

New quick disconnect couplings VIPER 100/150 ULTRA HIGH PRESSURE EXCELLENCE

Quick disconnect couplings for Ultra High Pressure hydraulics. UHP (Ultra High Pressure) connectors are highly technological products engineered to function with elevated pressures (ranging from 1.000 to 5.000 bar) for applications where quick connections are essential to exclude the risks steaming from leakages related to traditional connection with threaded screwing systems. The most indicated fields of applications for these types of articles are: rescue tools, bolt tensioning, lifting jacks and water blasting. The connectors are produced with specific types of materials capable of withstanding very high pressures, corrosion and guarantee the safety of the equipment during utilization.

The production of each connector follows very strict criteria and each connector is tested during each stage of production. The final product is designed to satisfy the most demanding needs and as well as with any hi-tech product requires highly specialized skills.

Quick disconnect couplings comply with regulations:

ISO 9001 2008 IQ NET

ISO 9001 2008

ISO 14001

ISO TS 16949 2009

VIPER 100

Enchufess-VIPER100

Special coatings are available upon request (electroless nickel, chrome, PVD, etc) Special versions with high strength stainless steel available on request. Safety lock available on request

VIPER100_ENG

VIPER100-Tabla-ENG

VIPER 150

Enchufes-VIPER150

Special coatings are available upon request (electroless nickel, chrome, PVD, etc) Special versions with high strength stainless steel available on request. Safety lock available on request

VIPER150_ENG

VIPER150-Tabla-ENG

Firesleeve HOSE PROTECTION AGAINST HEAT

Firesleeve is a fiberglass cover coated with red and fireproof silicone. The maximum operating temperature is 260 ºC and can withstand continuous temperature peaks of 1090 ºC for 20 minutes at 1650 °C for 30 seconds. This protection serves to protect hydraulic hoses , rigid pipes , electric cables, pipes or hoses of air conditioning ….. open flames , high ambient temperatures , vapors …. The protection can be supplied in diameters from 10 mm to 102mm , or tape

pyrojacket_pyrotape_2

Special products are also made according to customers’ requirements

custom

The firesleeve can be used in a variety of industries and applications such as automotive , steel , diesel engines , offshore, turbines and generators , glass factories , fire-fighting trucks , rail …

Firesleeve has a variety of certificates and specifications such as UL1441 , MSHA , SAE AS1072E , Germanischer Lloyd to 800 ° C for 30 minutes , BS EN373 , railroad DIN54837/5510-2 certificate for resistance to combustion, DIN5659 -2 / 5510-2 certified rail for toxicity.

PROTECFUEGO2

PROTECFUEGO

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