SFK Energy Drag Chains - Design and Ordering Guide

1. Product Overview and Characteristics

The SFK chain consists of a rectangular galvanized steel spiral band combined with an inner spring steel band. This design provides large usable cross-sections with low external dimensions, offering optimal line protection. It is particularly suitable for environments with hot chips and sparks, especially at low cantilever lengths. The operational temperature range is from -40 °C to +180 °C.

2. Ordering Information and Length Calculation

When ordering SFK chains, the length is calculated based on the maximum travel distance (L_v) and bending radius (R) using the formula:

L = (L_v / 2) + 4 × R

The straight length of the chain (SFK) is the order length minus a dimension 'z' (refer to the provided table for 'z' values).

Example order: SFK 32N / 100 x 1900 / N/N (type / radius x length / connectors / arrangement)

3. SFK Dimensions and Parameters

Note: The straight length is calculated as order length minus 'z' (see table above).

4. Flange Types and Mounting Options

• Flange N: Standard low-cost flange with four mounting holes.
• Flange A: Modified flange N with countersunk screws, knurled nuts, and angles.
• Flange B: Laterally connected flange with angles; standard flange N holes are omitted.
• Scoop Mount: Additional connector type to enhance mounting diversity.

5. Arrangement Types

Three main arrangement types are available for connectors and flanges:

• S1: 2 x outer radius
• S2: 1 x outer radius + 1 x inner radius
• S3: 2 x inner radius

6. Load and Carrying Length

The free carrying length (L_f) and load capacity (kg/m) depend on the chain type and arrangement. Specific load diagrams and parameters are referenced but not detailed in this summary.

7. Contact and Manufacturer Information

Manufacturer: Elytra
Address: Pol. ind. 103, C/Urune, 1, 20100 LEZO, Apartado 85, 20100 ERRENTERIA, GIPUZKOA
Phone: +34 943 52 42 00
Email: [email protected]
Website: www.elytra.es

Summary

This document provides technical specifications, ordering instructions, and design guidelines for SFK energy drag chains. It includes detailed dimensional data, flange and connector options, and arrangement types to assist in selecting the appropriate chain configuration for industrial applications involving cable and hose protection under dynamic conditions.