Mechanical Shaft Seals

Figure 5-51. Mechanical shaft seal. Courtesy of Elliott Companj/i...

Stage package 2/3, Clearances at the impeller 4/5, Inlet/outlet 6, Radial bearings 7, Axial thrust bearing 8, Barrel housing 9, Mechanical shaft seals. 

Oleum circulation pumps (generally submerged and with mechanical shaft seals). 

Caution There are chances of fire due to the circulating high-temperature oil, and hence, the motors, electrical fittings, and lighting must be flameproof. The pipelines, valves, gaskets, and pumps (with mechanical shaft seals) must he selected for high-temperature and high-pressure service and shall he tested as per statutory requirements. 

The reactor coolant pump is a vertical, single speed (1500 rpm), bottom suction, horizontal discharge casing unit with controlled leakage mechanical shaft seals and driven by a... 

Silicon carbide is manufactured in many complex bonded shapes, which are utilized for super-refractory purposes such as setter tile and kiln furniture, muffles, retorts and condensers, skid rails, hot cyclone liners, rocket nozzles and combustion chambers, and mechanical shaft seals. It is also used for erosion- and corrosion-resistant uses, such as check valves, orifices, slag blocks, aluminum die-casting machine parts and sludge burner orifices. Electrical uses of SiC include lightning arrestors, heating elements and nonlinear resistors. 

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