September 2004


Behavior of dry-running piston rod sealing systems in crosshead compressors

Various designs and materials were investigated

Feistel, N., Burckhardt Compression AG; Vetter, G., Friedrich-Alexander-University Erlangen-Nuremberg

Great demands are placed on the reliability of dry-running process gas compressors, due to the extraordinarily high costs resulting from any production losses. A simultaneous increase in the requirement for higher load parameters ? particularly in terms of the pressure difference to be sealed and the average piston velocity ? and longer maintenance intervals has led to more frequent dimensioning of dry-running sealing systems at the limits of stable operation. However, it is not easy to define these limits, due to the special operational characteristics of gastight frictional seals, which differ notably from those of the comparatively leaky noncontact seals. The expression ?gastight? i

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