What is the recommended maximum continuous operating temperature range for the EN 856 4SP S hydraulic hose and can it withstand temporary spikes up to +125Â°C?

The recommended maximum continuous operating temperature range for the EN 856 4SP S hydraulic hose is -40Â°C to +100Â°C. It can withstand temporary temperature spikes up to +125Â°C, but those higher temperatures are only for short-term exposure and not for continuous service.

Does the EN 856 4SP S hydraulic hose require specific storage conditions to maintain oil resistance and pressure ratings?

Yes. The EN 856 4SP S hydraulic hose requires appropriate storage to preserve its oil resistance and pressure ratings. Store clean, dry, ventilated, and shaded from direct sunlight and UV exposure; avoid heat sources and temperatures outside the -40Â°C to +100Â°C operating range. Keep hoses coiled without kinks, supported on racks, off the floor, and protected from oils, solvents, and sharp objects that could damage the outer rubber. Avoid long-term contact with ozone- or solvent-emitting materials and chemical contaminants. Maintain ambient conditions that prevent compression or deformation of hose ends and steel wire reinforcement. Follow FIFO rotation and avoid storage beyond manufacturer-recommended shelf life to ensure maintained oil resistance and rated working pressure.

How does the EN 856 4SP S hydraulic hose's four-layer steel wire reinforcement affect bend radius and flexibility under high pressure?

The four-layer steel wire reinforcement in the EN 856 4SP S hydraulic hose significantly increases its pressure capacity and abrasion/impact resistance but also affects bend radius and flexibility, especially under high pressure. Key effects: - Reduced static flexibility: Four layers of highâtensile steel wire make the EN 856 4SP S hydraulic hose stiffer than single- or twoâspiral constructions. At ambient pressures the hose requires a larger minimum bend radius compared with less-reinforced hoses. - Pressureâdependent stiffness increase: As internal pressure rises toward the hoseâs working pressure range (280â450 bar depending on diameter), the wire layers become more loaded and the hose resists radial expansion. This increases axial stiffness and reduces flexibility further, so the effective bend radius under high pressure grows compared with an unpressurized state. - Improved shape retention under load: The multiâspiral reinforcement prevents kinking and collapse when bent under pressure, allowing safer bends at smaller radii than would be possible with textile reinforcements, but still larger than more flexible spiral types with fewer layers. - Temperature interaction: Operating temperatures from â40 Â°C to +100 Â°C (temporary to +125 Â°C) influence rubber elasticity; at higher temperatures the rubber matrix softens slightly, which can marginally improve flexibility, while at low temperatures the hose becomes stiffer, further increasing the required bend radius. Practical implication: - When installing EN 856 4SP S hydraulic hose, use the manufacturerâs specified minimum bend radius for the specific diameter and consider the operational pressure and temperature. Expect reduced flexibility and a larger effective bend radius under higher pressures and lower temperatures, but benefit from superior pressure resistance and kink protection.

EN 856 4SP S hydraulic hose

All products, Hydraulic rubber hoses/

Additional information

Material	synthetic rubber
Maximum operating temperature [°C]	100
Minimum operating temperature [°C]	-40
Standard length [m]	10, 15

General-purpose hydraulic hose. Standards: EN 856 4SP. Inner layer: black, oil-resistant synthetic rubber. Reinforcement: four layers of steel wire. Outer layer: black, oil-resistant synthetic rubber. Working pressure: from 280 bar to 450 bar depending on hose diameter. Operating temperature: from -40°C to +100°C (temporarily up to +125°C).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HW-4SP-06S	Hydraulic hose DIN EN 856 4SP 1/4"	6	450	In stock	Enquiry
HW-4SP-10S	Hydraulic hose DIN EN 856 4SP 3/8"	10	445	In stock	Enquiry
HW-4SP-13S	Hydraulic hose DIN EN 856 4SP 1/2"	12	415	In stock	Enquiry
HW-4SP-16S	Hydraulic hose DIN EN 856 4SP 5/8"	16	350	In stock	Enquiry
HW-4SP-19S	Hydraulic hose DIN EN 856 4SP 3/4	20	350	In stock	Enquiry
HW-4SP-25S	Hydraulic hose DIN EN 856 4SP 1	25	280	In stock	Enquiry

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General-purpose hydraulic hose. Standards: EN 856 4SP. Inner layer: black, oil-resistant synthetic rubber. Reinforcement: four layers of steel wire. Outer layer: black, oil-resistant synthetic rubber. Working pressure: from 280 bar to 450 bar depending on hose diameter. Operating temperature: from -40°C to +100°C (temporarily up to +125°C).