Seaman Marcell Rainey uses a test strip to check the pH at the pump tank cap while cleaning a U-bend heat exchanger at Southeast Regional Maintenance Center (SERMC). Nov. 16th. The cleaning fluid is cycled through the heat exchanger for at least three consecutive pH neutral tests, then flushed with fresh water.

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Photo credit: © Apple White / Alamy / Afripics
License: Licensed
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Keywords: archive, armed, chiller, defence, exchanger, forces, heat, maintenance, military, repair, reportage, sermc, servicemen, usa