Hose assembly

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hydraulic hose assembly - China Manufacturer

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Characteristics and uses
High pressure hose assembly is generally by liquid-resistant synthetic rubber adhesive layer, middle rubber layer, the I to Ⅵ layer wire braid reinforced layer, and resistance to weather performance synthetic rubber cover. Main ly used in hydraulic support the mine, oil field exploitation, and suitable for construction, lifting and transport, transport in the forging of metallurgical, mining equipment, ships, injection molding machinery, agricultural machinery, machine tools and industrial sectors of mechanization and automation hydraulic system has a certain pressure and the temperature of the petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) liquid, water-based liquid (such as emulsions, oil-water emulsion, water), gas and liquid transmission and other fields.

How Selection
A lot of factors that affect the use of the hose assembly, only in accordance with the conditions the correct selection of hose and fittings, in order to ensure the reliability and economy of using the hose. These factors are:
1, hose size
Hose ID to be appropriate, the diameter is too small will increase the flow rate of the medium in the pipeline, so that t he system heat, reduce efficiency, and will produce a large pressure drop, affecting the performance of the entire system, if the hose with pipe clamp or hose to wear over the steel plate spacer, should also pay attention to the size of the outside diameter of the hose.
2, work pressure
General Hose dynamic pressure is the highest pressure hose allows continuous work. The safety factor of hydraulic hose in accordance with the provisions of the relevant international standards, is generally recommended working pressure is usually a quarter of the hose minimum burst pressure value.hydraulic hose machine
3, the impact of stress and fatigue life
Hose selection is determined based on the value of the maximum pressure of the hydraulic system design. Value is usually due to the pressure of the hydraulic system is dynamic, and sometimes there will be a shock pressure, the peak shock pressure will be consi derably higher than the system s maximum pressure value. But generally have a relief valve in the system, the impact of pressure will not seriously affect the fatigue life of the hose. Impact particularly frequent pressure hydraulic systems, suggested the use of a special product of ripple impact resistant hose.
4, the temperature range
Users should be used in the temperature range of hose quality specification allows hose. If the working environment temperature exceeds this range, will affect the life of the hose will be greatly reduced its ability to withstand pressure. Work long-term ambient temperature is too high or too low, the system recommended hose jacket.
5, chemical compatibility
Special hydraulic medium, users should ensure that the selected hose assembly inside the hose, the outer layer, joints and O-ring seals and media compatibility.
6, a bending radius
Meaning: right, R is the hose can be bent but will not damage or shorten the l ife of the inner circle (minimum) radius.
For a hose, the R value is certain. If the bend radius is less than the R value, with a textile reinforcement layer of the hose used is likely to occur kink. Spiral wire hose will be better.
7, friction
Hose use usual contact or friction with hard objects, it is recommended that the hose external springs jacket.hydraulic valve block