Details

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Fastul 4SH Hydraulic Hose Overview

Fastul 4SH hydraulic hose is a four-wire-spiral hose for selected high-pressure hydraulic applications. The existing product information identifies DIN EN 856 4SH, a synthetic-rubber tube, four spiral layers of high-tensile steel wire and an abrasion- and ozone-resistant synthetic-rubber cover.

DIN EN 856 4SH Identification

Confirm size-specific manufacturer data

The 4SH designation identifies a hose construction family, not one pressure rating for every size. Verify the hose marking, current data sheet, standard edition, size-specific working pressure, impulse requirement, minimum bend radius and outside diameter before assembly design.

Four-Spiral-Wire Construction

Tube, reinforcement and cover

The published construction lists a synthetic-rubber tube resistant to hydraulic fluids, four spiral layers of high-tensile steel wire and a synthetic-rubber cover intended to resist abrasion and ozone. Actual fluid compatibility and environmental resistance must be checked for the selected hose and service.

Temperature and Hydraulic Fluid Review

Published range requires application confirmation

The existing information lists -40°C to +121°C. Confirm that this range applies to the exact hose size, fluid and pressure condition. Continuous elevated temperature can shorten hose life and may require pressure derating or different seals and fittings.

Pressure, Flow and Routing Selection

Provide normal pressure, relief setting, surge or impulse conditions, required flow and hose ID. Four-spiral hose can require a larger bend radius than lighter hose types. Avoid twist, tight bends, tension and side load at the fittings, and allow for machine movement.

Compatible Fittings and Crimp Control

Use a validated hose-and-fitting system with the specified insert, ferrule and crimp dimensions for the exact 4SH hose. Mixing unapproved components can compromise retention and pressure integrity. State end-connection standards, orientation, overall length and any abrasion guard or fire sleeve requirement.

Inspection, Handling and Replacement

Inspect for cover damage, exposed or corroded wire, kinking, leakage, fitting movement and external abrasion. Protect the assembly from hot surfaces and impact. Never search for hydraulic pinhole leaks by hand, and isolate accumulators and all stored pressure before inspection or replacement.

Frequently Asked Questions

Does every 4SH hose share the same pressure rating?
No. Working pressure and bend radius vary by hose size and manufacturer data.

Can any four-spiral fitting be used?
No. The fitting, ferrule and crimp specification must be validated for the exact hose.

What information is required for a quotation?
Provide hose ID, length, fluid, pressure, temperature, end connections, orientation, movement, quantity and protection or testing needs.