Rail Damper

KZN Rail Damper

The KZN rail damper is a rail damping system installed on both sides of the rail web. It effectively attenuates rail vibration, reduces wheel-rail impact noise radiation, minimizes wheel-rail wear, and lowers maintenance frequency. Proven to decrease track noise by over 5dB, it significantly improves vibration attenuation rates and controls rail corrugation. With minimal components and easy installation, it is compatible with various rail fasteners, vibration mitigation measures, and operational conditions—suitable for both new line construction and existing line retrofits.


Performance Indicators:

No.

Items

Unit

Technical Index

Test Standard

1

Hardness (Shore A)

-

45~80

GB/T 531

2

Tensile Strength

MPa

≥13.0

GB/T 528

3

Elongation at Break

%

≥300

4

Compression Set (70°C, 22h)

%

≤30

GB/T 7759

 

5

Volume Resistivity

Ω.cm

≥108

GB/T 1692

6

Thermal Air Aging (70°C, 72h)

Tensile Strength

MPa

≥11

GB/T 3512

Elongation at Break

%

≥200

Hardness Change

%

≤10

7

Ozone Resistance Test (40°C, 50pphm, 70h, 7× magnification)

/

No cracking

GB/T 7762

8

Volume Expansion Ratio

(23℃,70h)

ASTM3#

%

≤100

GB/T 1690

ASTM3#

%

≤20

 

                 Overall Technical Specifications for Rail Damper

Item Name

Technical Specification

Vibration Reduction

Effectively reduces track noise radiation 5-7 dB and decreases rail vibration by 7-10 dB

Fatigue Performance

Withstands 3 million cycles of fatigue impact testing without loosening or detachment

Installation Interface

Highly compatible and customizable with various rail fasteners and other vibration reduction measures

Anti-Corrosion Method

Silver-white Dacromet closed coating layer, meeting Grade 9 requirements for 360h neutral salt spray test

Advantages

The product features non-adhesive mechanical fixation for quick installation, broadband vibration and noise reduction with high/low temperature adaptability, multi-degree-of-freedom tuned absorption to mitigate rail corrugation, as well as easy installation and maintenance.

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