How to Select Hydraulic Hose

How to Select Hydraulic Hose

A hydraulic hose is a special conduit that facilitates hydraulic fluid transmission from one point to another. These hoses withstand high pressure and make the fluid flow properly.

You use them to connect other elements in hydraulic machinery, for example, cylinders, pumps, and valves. They are valuable in the domain of power transmission across hydraulic systems.

Key Factors to Consider Before Selection

A plethora of factors need your attention when choosing the right hydraulic hose. The main factors for your attention are:

Pressure Rating

Pay attention to the Pressure rating of the hydraulic hose at which it smoothly functions. A higher pressure rating of the Hose than the built-in rating of the system ensures stable and smooth operation.

This is because fluid power encounters peak pressures, pulsations, and pressure surges. It is essential to establish the appropriate working pressure that suits your application. Selecting a hose with a pressure rating below the recommended one may lead to a hose burst, leaks, and possible accidents.

Range of Temperature

Range of Temperature

Find out the range of the temperature within which your hydraulic hose can function effectively. Determine the highest as well as lowest range of temperature.

This is helpful if you are using hot fluids. You can this way eliminate material degradation as well as leakage of fluid.

Review the ambient temperature, the temperature of the liquid, and the fluctuation of temperature, and select the operation temperature range that is convenient for your chosen hydraulic application.

An appropriate hose with the right temperature range, corresponding with your operating conditions, will lead to superior performance and longevity.

Hydraulic Hose Size

Hose size has been considered to be a decisive factor in determining hydraulic system efficiency as well as its performance. The various factors like the hose run and the bending angle greatly affect the hose selection.

Length of the Hose Run: Hose runs are the measure of the distance or length between hydraulic components. The hose run plays a key role in connecting different hydraulic components. Keep in mind the flow rate, fluid viscosity, and friction losses when you are choosing the appropriate hose size.

Bend Radius: The bending radius is the smallest radius at which a hydraulic hose can bend without impeding the fluid flow. A hose with a suitable radius will prevent kinking, twisting, or collapsing. These effects eventually cause the system to perform badly, which might lead to premature hose failure. Involve issues like hose construction, flexibility, and expected usage while selecting the perfect fit.

Construction Materials

The selection of hydraulic hoses is an issue that you always need to take into account. You have to consider the range of construction materials. Each type, as below, offers different features and perks:

Rubber:

The hoses consist of synthetic rubber that gives flexibility and also offers abrasion resistance. They’re typically included in medium to high-pressure hydraulic systems.

This is because of their toughness and multi-functional use. Rubber hoses have several types, for example, orthotone-laced single wire, double-laced wire, and multiwire spirals.

Thermoplastic:

The Thermoplastic hose comprises of thermoplastic materials featuring polymerisation. This includes materials including polyester, nylon, and polyurethanes. They are inexpensive and less pricey compared to conventional rubber hoses and provide much better chemical resistance. Thermoplastic hoses offer greater flexibility and resistance to abrasion.

Metal Hydraulic Hoses:

Stainless steel hoses are commonly known as metal hoses. They feature metal tubing, generally made of stainless steel and fittings.

Besides, they offer better strength and innate sturdiness, which makes them applicable in high temperatures and high pressure. Metal hoses often find their application in the most challenging environments, especially industrial equipment and hydraulic power units.

Application and Environment

When choosing a hydraulic hose, you have to evaluate the application and the environment first. Consider the following:

· Flexibility Requirements

Establish if the layout refers to the static or the dynamic kind of the activity. Have the hoses selected made of appropriate flexibility to be compliant with the operational requirements?

· Abrasion Resistance Needs

When your hydraulic system operates in rough conditions or has frequent friction on the surfaces, the hoses with high abrasion resistance can help your system live longer.

· Chemical Compatibility

Make sure that the hose material is matching with the pattern of hydraulic fluid in your system. Chemical reactions between unacceptable materials may deteriorate the hose strength.

· Exposure to Environmental Factors

Find out whether the hose will be exposed to UV radiation, harsh weather conditions or other environmental elements. Choose hoses carefully based on their materials and a defensive cover.

In addition to application-specific factors, consider the following aspects:

Fitting compatibility: The hose is compatible with the hose used in your hydraulic systems. Failing to match compatible parts often results in joint leaks or devices falling apart.

Flame resistance requirements: Find hoses with a built-in fire-resistance feature to assure safety if your application comes with the involvement of high temperatures or combustible materials.

Maintenance and Replacement Considerations

Routine maintenance will guarantee the machine’s dependability and efficiency. Here are some considerations:

Inspection: Regularly check hoses for disintegration, deterioration, or damage. Check for leaks, if possible, too. Fix any bugs in the system quickly to avoid crashes or mishaps.

Replacement: Replace the hose after the indicated duration or once the signs of aging are evident. Replacement at the right time facilitates in the prevention of a sudden failure and makes the system reliable.

Hose Performance Standards and Certifications

In relation to hydraulic hoses, consider using industry standards and certifications in order to ensure quality and reliability. Common standards include:

SAE (Society of Automotive Engineers) Standards: SAE establishes requirements for hydraulic hose factors like external diameter, pressure rating, and temperature range.

ISO (International Organization for Standardization) Standards: ISO standardizations ensure consistent design, construction, and performance characteristics of hydraulic hoses all over the world.

DIN (DeutschesInstitutfürNormung) Standards: Moreover, a large part of DIN standards with the title “hydraulic hoses and fittings“ help you better conform to European standards.

EN (European Norm) Standards: Following EN standards, which are in line with the European Regulations and demand fulfillment of the safety and performance standards. They provide safety and quality assurance.

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