Hydraulic hoses
Technical reference and selection guides on hydraulic hoses.
15 guides
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How does a wire braided hydraulic hose work?
In a wire braided hydraulic hose, the braided reinforcement around the inner tube helps carry the pressure load. Selection is not made by the number of braids alone; hose type, size, pressure, temperature, impulse condi…
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Differences between single and double wire braid
Single and double wire braid distinguish the construction of the reinforcement layers; on their own they do not indicate a specific working pressure. Comparisons should be made at the same size, and the products' actual…
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The selection logic for compact hydraulic hoses
Compact hydraulic hoses are designs that, in certain series, meet tighter installation requirements. For 'compact', the outside diameter, minimum bend radius and fitting system must be examined per product; it is not as…
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Using textile reinforced hydraulic lines
In textile reinforced hydraulic hoses, the load-bearing structure may consist of suitable fibers instead of metal wire. The pressures and fluids it is used with are determined per series. The term textile reinforcement …
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Selecting the outer cover of a hydraulic hose
The outer cover is selected for abrasion, weather, ozone, oil contact or other external effects. The fluid compatibility of the inner tube and the resistance of the outer cover are separate matters. A durable cover does…
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Where are spiral wire hydraulic hoses used?
In spiral wire hydraulic hoses, the reinforcement is formed with a wire arrangement different from braiding. This construction is seen in product families used in heavy hydraulic applications. For selection, the pressur…
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The constant pressure class approach for hydraulic hose
A constant pressure hose family means that the sizes within a defined product scope are offered according to a common working pressure class. It does not mean the pressure is kept constant inside the hose by itself. Tem…
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What does impulse performance mean?
Impulse resistance refers to performance under repeated pressure cycles. Passing a single hydrostatic test does not mean the same impulse life has been verified. A cycle count should only be compared together with the t…
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How to compare high flexibility claims
Flexibility is not measured by minimum bend radius alone. The force required to bend, limits for dynamic use, twisting behavior, weight and connection geometry also matter. The comparison should be made at the same size…
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When should braided and spiral construction be compared?
The choice between braided and spiral wire hose is made according to the pressure and impulse requirements of the application and the installation conditions. Neither construction is unconditionally superior to the othe…
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Selecting a hydraulic return line hose
A hydraulic return line should not be treated as equivalent to an ordinary liquid hose because of its seemingly low pressure. The fluid, temperature, flow rate, back pressures caused by filters and coolers, and transien…
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Vacuum resistance in a hydraulic suction line
A hydraulic suction hose must be suitable for the vacuum that will occur at the operating temperature and for the flow conditions. Being a high-pressure hose is not sufficient for suction. Collapse resistance, inside di…
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Checklist for water-based hydraulic fluids
With water-based hydraulic fluids, hose selection cannot be made based only on the phrase 'hydraulic oil compatible'. The fluid class, actual composition, temperature and manufacturer approval are decisive. The same hos…
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Compatibility in high-temperature hydraulic lines
In high-temperature hydraulic service, the conditions to be met jointly by the hose, fittings and seals must be defined. It is not assumed that the highest temperature and the highest pressure in the catalog apply at th…
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Using hydraulic hose in cold environments
For a hydraulic hose to be used at low temperature, not only the storage temperature but also cold bending and the operating condition must be verified. The behavior of the hose, seals and fluid are assessed together. F…
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