LETONE hydraulic hoses and connectors comply with various general standards such as SAE, DIN, ISO, GB, MSHA, MT, etc. Its various high, medium and low pressure products are suitable for the manufacture and maintenance of engineering machinery such as excavators, agricultural machinery, coal mining machinery, high-speed rail vehicles, etc., meeting the needs of high-performance hose users. LETONE wire braided rubber hose LT681 (SAE 100RAT/EN853 SN) has obtained the product design approval of the American Bureau of Shipping ABS
I. Structural differences: braiding VS winding process
1.4SP (wire braiding)
4 layers of high-strength steel wire are interlaced at an angle of 54°~55°, and the rubber between layers is bonded, which has better flexibility.
Advantages: strong torsion resistance, suitable for frequent bending scenes (such as excavator boom pipelines).
2.4SH (wire winding)
4 layers of steel wire are spirally wound at a 90° angle, without crossing between layers, and have higher pressure bearing capacity.
Advantages: excellent pulse fatigue resistance, suitable for ultra-high pressure systems with severe pressure fluctuations.
II. In-depth analysis of performance parameters
Pressure bearing:
The bursting pressure of
4SH can reach 4 times the working pressure (such as the bursting pressure of LETONE 4SH25mm hose ≥240MPa), far exceeding the 2.5 times coefficient of 4SP.
Temperature adaptability:
Both cover 40℃~+100℃, but 4SH has better stability under high pressure + high temperature coupling conditions.
III. Selection guide: Match according to working conditions
Choose 4SP when:
✅Pressure ≤40MPa and flexible pipe laying is required (such as port crane hydraulic system).
✅For cost-sensitive projects, the price of 4SP is usually 15%~20% lower than that of 4SH.
Choose 4SH when:
✅Pressure ≥40MPa or high-frequency pulses exist (such as shield machine propulsion hydraulic cylinder).
✅Long life demand scenario (
4SH wear-resistant layer thickness is 30% higher than 4SP).
LETONE Technology Enhanced Technology Highlights
4SP Upgraded Version: Using pre-deformed steel wire weaving technology, bending fatigue life is increased by 50%.
4SH patented design: inner layer composite UPE+NR rubber, compatible with new media such as biodiesel.
Need specific model parameters? Contact LETONE engineers!
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