Use CasesReducing the maintenance load of a high-temperature nitric hydrofluoric acid transfer pump

Liquid Type
Process Type


Iron and steel manufacturer

Customer's Needs and Problems

High-temperature nitric hydrofluoric acid is transferred within the steelworks.
Conventionally, a pump with PFA lining was used, which posed the following problems.

  • The lining peeled off or developed pinholes due to temperature and pressure fluctuations. This led to pump corrosion, which resulted in liquid leakage.
  • The mechanical seal has a complicated structure, which made adjustments take a lot of time and effort. In addition, slurry retention led to repeated occurrences of wear and liquid leakage. As such, the maintenance load was large.

TACMINA's Solutions

The transfer pump was replaced with a MUNSCH (PVDF) slurry pump made of resin.

  • An impeller formed from thick, pure PVDF resin is used, so there is no longer any need to be concerned about pinholes or peeling occurring.
  • Problems such as liquid leakage were solved with a mechanical seal appropriate for slurry liquid.