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EagleBurgmann Espey Introduces New Carbon Floating Ring Seal

Contributed by: PumpScout Staff

EagleBurgmann Espey, a leading certified producer of carbon floating ring seals, has introduced the WD200/500 series of carbon floating ring seals. They have been installed in many different machine types that include rotating shafts in fans, steam turbines, mixers, and mills.

Because the product is so effective, the WD200/500 series can be used in industries that include chemistry, metal, cement, food, power station technology, mechanical, and plant engineering. They can seal flammable, acidic, toxic, and vaporous gasses, as well as liquid mist, oil mist, creeping oil, and water.

The WD200/500 series of carbon floating ring seals is extremely easy to use because each one contains divided housing and segmented seal rings. Seal assembly and seal ring replacement does not require dismantling the machines.

Once example is the Espey WD200, where the seal ring is precisely calculated to fit into the shaft, which enables a defined buffer gas flow into the process compartment, preventing gas from escaping into the atmosphere.

The Espey WD500 is fitted to the atmosphere side with seal rings that overlap the mortised joints, allowing them to slide on the shaft with self-adjusting capabilities. This reduces the radial gap to the shaft and the volume of leakage, as the consumed buffer gas to the outside is very low.

Seal components in the series are not mounted on the shaft, preventing shaft vibrations. A short axial length provides potential savings because of the reduced vibrations. Seal housing can be configured with diverse connection bores that allow for the feeding of buffer gas, the injections of a flushing medium, and the selective removal of residual gas and condensate, further preventing leaks.

Operating range details:

  • Shaft diameter: d = 45 to 340 mm
  • zOperating pressure: p = vacuum to 3 bar abs
  • Operating temperature: t = -120°C to 500°C (carbon) and -120°C to 150°C (PTFE-compound)
  • Sliding velocity: vg = max. 40 m/s
  • Radial play: ±2.5 to 5.0 mm
  • Axial movement is theoretically infinite
  • Recommended wear protection >58 HRC

Source: EagleBurgmann