Expansion joint flanged type ZKB DN125 149B12558C

Flexible collar coupling – vibration and noise reduction in installations

This rubber-collar coupling, type ZKB, manufactured by SOCLA, is a key element in installations where vibration damping, movement compensation, and noise reduction are essential. The flanged connection simplifies installation and disassembly, while the robust construction ensures long-term reliability. It is an ideal solution for both professional installers and end-users looking for quiet and stable system operation.

Construction and application

The ZKB coupling is designed to operate within a wide temperature range (up to 95°C) and pressures (Pnom 1.6 MPa). Made of EPDM (or optionally NBR) and galvanized steel, it offers high resistance to corrosion and mechanical damage. Flanges drilled according to PN10 and PN16 standards ensure compatibility with various types of pipelines.

The main applications of the ZKB coupling include:

• Compensation for expansion and contraction of the installation caused by temperature changes.
• Damping of vibrations and oscillations generated by operating equipment (e.g., pumps, fans).
• Reduction of noise transmitted through pipelines.
• Protection of the installation against electrical current conduction (to a certain extent).
• Absorption of movements caused by building settlement or other external factors.

Product advantages in practice

• Versatility: Possibility of use in various media and working conditions thanks to high-quality materials.
• Durability: Robust construction with a combination of EPDM rubber and galvanized steel guarantees long service life.
• Easy installation: Flanged connection simplifies the installation and servicing process.
• Cost reduction: Vibration damping reduces the risk of damage to installation components, resulting in lower repair costs.
• User comfort: Noise reduction improves the comfort of use in rooms where the installation is located.
• Flexibility: The coupling allows for some deformation during operation, compensating for pipeline movements without risk of damage (within the permissible extensions, contractions, displacements and distortions – see manufacturer's technical data).

Additional options available on request include stainless steel flanges (304, 304L, 316, 316L) and PN25 or ANSI 150 drilling. A locking ring for vacuum installations is also available.