Sealing solution for crystallizing media

Sulfur is a challenging element. It is flammable (dust explosion hazard), among other things, and in its liquid state with the addition of air it will generate a very toxic sulfur dioxide (SO2). The substance also exhibits crystallizing properties, which regularly causes problems during the technical processing.

Sulfur is in a liquid state in a temperature range between +120  °C … +160 °C (+248 °F … 320 °F). While pumping liquid sulfur, continuous minimal leakage in the area of the shaft seal frequently causes problems. This leakage clogs the drainage pipes and causes the steam quench to escape through the throttle bushing in the direction of the bearings where considerable damage can occur as a result. The sulfur leakage crystallizes and strongly contaminates the pump and environment.

EagleBurgmann SulfurAce increases availability of pumps

With the mechanical seal SulfurAce, specifically designed for use in liquid sulfur and other crystallizing media, these problems are a thing of the past. Optimal availability and functionality of the pump, a clean working environment in the system and significantly reduced maintenance costs are attainable for the end user.

The quality of the EagleBurgmann SulfurAce lies in the product-protected single spring and drive pin. In the event of leakage, the large sphere of action of the single spring together with the cleaning effect of the direct steam quench prevents the components and connected lines from clogging. The integrated EagleBurgmann QS300 quench seal effectively prevents quench steam leakage in the direction of the bearings.

Operating range

  • Temperature: t …180 °C (… 356 °F)
  • Pressure in seal compartment: p …10 bar (…145 PSI)
  • Sliding velocity: vg …20 m/s (…66 ft/s)
  • Contained solids: …30 wt %
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