Thursday, May 14, 2009

Centa-Sec Ensures Fail-Safe Compressor Operation

Centa-Sec, Centa's flexible coupling system, offers a torsionally soft alternative to standard all-metal couplings used in gas and oil industry businesses. These couplings shift harmful resonances to subcritical ranges, ensuring fail-safe operation of the compressor system. The couplings are type-approved by renowned classification societies and are designed in consultation with the customer to meet API standards. Companies in the oil and gas industries look for large compressor units with high performance and efficacy.

These units are normally driven by a powerful electric engine, which is connected to the compressor unit by an all-metal coupling. The drawback of this design is that harmful vibrations induced by the piston compressor, caused by high torsional stiffness and weak damping characteristics of the couplings, are transmitted to the drive unit. They result in damages to the coupling and high loads for the bearing units, which may even cause a total breakdown of the system.

Centa-Sec offers an alternative solution to standard all-metal couplings. Torsionally soft, the couplings shift harmful resonances to ranges beyond the operating speed. With only minimum impact on the system, these couplings even equalise misalignments caused by installation and operation. The principle of a modular-design coupling system is based on one or more highly flexible Centax rubber elements made of natural rubber or silicone, supplied in different ranges of shore-hardness.

Combined with a membrane coupling, a link or a bolt coupling and an array of flanges and hubs, the couplings achieve top flexibility in all directions, extreme adaptability with regard to design and construction, as well as an extremely manageable torsional stiffness. The torques cover a range from 2.5 to 650kNm. Close co-operation with the customers ensures the couplings meet API standards.

Centa couplings have been type-approved by several leading international classification societies. Since 1990, the company's quality-management system was approved according to DIN ISO 9001. Since that time, all subsequent audits have been passed successfully.

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