Sierra de Huelva Mine (Spain)


The main difficulties were to overcome height difference about 600m from the daily surface tanks to the main tanks installed inside the mine; and achieve ATEX certification.

Solution adopted by INPRO

Carefully select and separate in design phase the devices that are installed in the Risk-area and Non-Risk-area (ATEX certification)


  • Tank control: EDM-40 ATEX
  • Level switches SMMR-2 explosion-proof head
  • Pumps explosion-proof:   1 x fuel pump (80L/min)
  •                1 x fuel pump (200L/min)
  • Solenoid valves
  • PLC control system
  • Pressure regulator

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    Diesel supply for Backup Critical Facilities

    We are specialized in the design and manufacture automatic fuel, pumping systems for critical backup installations, and industrial and commercial heat production.

    We develop engineering bespoke solutions for automatic supply of boilers and power generation plants in:

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