3.6 Pumps

Most pumps are suitable for ethylbenzene, except those having copper, bronze, or plastic parts. (Details on material compatibility with ethylbenzene are found in Appendix 3). Centrifugal pumps with enclosed impellers and mechanical seals are the most widely used, but displacement pumps and rotary pumps are satisfactory. A canned or magnetically driven pump may be considered to comply with tight fugitive emission regulations. All metal should be properly grounded to avoid static accumulation. As deadheading will cause heat build up a minimum flow line should be installed. In addition to mechanical reliability aspects, environmental performance parameters should be considered in the selection process for seals. For mechanical seal components it is recommended to specify the stationary face (e.g. tungsten carbide) and rotating face (e.g. carbon). Tandem seals with barrier fluid are recommended.

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