Sand, mud, water and falling rock are just some of the challenges seals face in mining operations. In addition, peak pressures of up to 250 MPa call for a special seal design. High extrusion resistance is particularly important: parts of the seal, or even the seal itself, must not be forced into the gap between the moving and stationary elements of the design, as this would greatly shorten the seal’s service life. Installation recommendations covering every component of the sealing system are developed in close cooperation with customers. They include all dimensions and tolerances relating to the sealing element, maximum guide loads and the resulting individual clearances. Whether in the customer’s design department or during on-site service, these certified installation drawings save time and money while ensuring design reliability.

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Tunnelling

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