This gas seal exhibits a self-cleaning effect

Cartex GSDN bi-directional gas-lubricated seals can be used to standardize new centrifugal pumps or recondition existing pumps that have conventional stuffing-box packings or liquid-lubricated mechanical seals. The characteristic design feature of the Cartex Series is a seat and shaft sleeve that rotates along with the pump shaft, while the springs remain stationary. Internal pressurization together with centrifugal forces creates a self-cleaning effect at the sliding faces during ongoing operation. This prevents harmful contamination and increases operational reliability, especially in applications where the media contains solids. Other design features of the Cartex GSDN are high axial tolerance and the absence of dead space. The seals have silicon-carbide-face materials and a high-strength diamond-like carbon (DLC) coating ensure optimal performance in continuous operation. — EagleBurgmann LP, Houston, Tex.
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