Huge investment in heavy large machinery and equipment, in order to maximize the use of equipment as soon as possible as soon as possible to recover the investment, operation of equipment, high reliability requirements. Heavy machinery and equipment in large seals are everywhere, although its value is only a small percentage of the total cost, but is essential to ensure the normal operation. Seal on the device is often the key to control and enforcement components, but also wearing parts, if it is because of premature seal failure caused an unplanned shutdown complete overhaul of equipment replacement seals, and its loss will be far higher than the seal Pieces of their value.

 Heavy machinery and equipment on large parts of the main seal large size, require large size of the seal, for example, equipment for tunnel construction shaft at more than 10m diameter rotating seals, tons of press on the cylinder capacity of reciprocating seal diameter 2m or more. As manufacturing reasons, even with improved processing accuracy class, large-size metal parts also with larger size of the absolute tolerance. Coupled with the deformation structure, seals tend to have larger gaps and eccentric, requiring large gap seal high-pressure conditions in the work reliably and have a good following performance.

 The installation of large seals are also an important aspect. In particular, equipment maintenance, field replacement of seals is not easy, requires experience and skill. Devices and applications in specific situations, requires the use of split (open structure) of the seal can bond in the field installation, without removing the hydraulic cylinder piston rod or shaft.

 Large heavy machinery wide range of applications, working conditions are not the same, the key parts of the huge size of seals, the seals and high performance requirements that often require special design of the seal. Here are three heavy-duty sealed the success of large-scale machinery case.