Fire protection is all about making people’s life safe and easy – even after a fire.

The HI-FOG® water mist fire protection system makes this possible. It is a result of a great innovation: fire is suppressed with less water.

Now the system is even more reliable with its brand new heart, the HI-FOG® Electric Pump Unit, which takes fire protection and easy living to the next level.


Advanced control system

  • The pump unit provides only the required pressure and flow, depending on how many sprinklers or spray heads are activated.
  • Pressure optimization is achieved with the software control and a frequency converter.
  • During activation, the control system runs only as many motors as needed to reach the system working pressure.
  • Excess water unloading is no longer needed in the operational mode, which simplifies the mechanical design.
  • All critical control functions, including activation and pressure control, are redundant to ensure operational reliability.

Simplified mechanical design

  • The number of wear and tear components has been minimized for increased system reliability and simplified maintenance. There are no more:
    • separate stand-by pump
    • unloaders
    • break water tank
    • pressurized air supply
    • chain drive

User-friendly interface

  • The EPU is equipped with a user interface that provides a real-time status of the pump unit and the HI-FOG® system, alarm and help information, maintenance reminders and event history ensuring efficient and optimized maintenance activities.
  • The user interface is easy to use and configurable in multiple languages.

Unique modular design

  • The HI-FOG® EPU consists of a mechanical pump skid and separate control cabinet
  • All service points are easily accessible from two sides.
  • The modular structure together with practical service access enables flexible installation and optimized footprint.


What is the needed water inlet pressure for the HI-FOG® Electric Pump Unit?

The required water inlet pressure is 2-6 bar (30-90 PSI) with the required flow (in case of integrated filter). The flow requirement depends on the system size. If needed, the feed water line can be equipped with one or several feed water pumps. Feed water pumps can be controlled by the HI-FOG®Electric Pump Unit control cabinet.

How much power does the HI-FOG® Electric Pump Unit need for operation?

The power requirements depend on the size of the pump unit. The required operating pressure and flow determines the amount and the size of the motors. The first release covers the 27kW motors that are capable of operating at 50Hz or 60Hz for a wide variety of voltages. Motor start current peak is always higher than nominal current. The peak can be reduced with soft starters or, in special cases, with additional frequency converters.

How is the operational reliability of the HI-FOG® Electric Pump Unit ensured?

Operational reliability is promoted through internal Controller Area Network (CAN) bus communication, embedded control system (printed circuit) boards and system pressure monitoring, which are duplicated. Each electric motor also has individual control circuits to ensure that the unit is able to operate even if one of the motors has a malfunction. The number of wear and tear components has been minimized for increased system reliability and simplified maintenance.

What kind of information is available via the pump user panel?

The user interface allows access to real-time data from the pump unit and HI-FOG®system status. The event log provides valuable information for the field service as well as historical event data, for example, for post-fire event analysis. The user interface gives clear instructions and notifies of the upcoming periodical maintenance.

What are the requirements for the HI-FOG® Electric Pump Unit pump room?

Typically pump units are located in a technical space that contains the water inlet, electric feed, drainage and sufficient service space. The requirements may vary depending on the system type. The modular structure with mechanical pump skid and separate control cabinet enables flexible installation and optimized footprint.

Can the unit be installed next to a wall?

Yes, the mechanical pump skid and the separate control cabinet can be installed next to a wall as long as the minimum service area requirements are met. More information is available on the HI-FOG®Electric Pump Unit data sheet.

What kind of service is needed for the HI-FOG® Electric Pump Unit?

The maintenance routine includes periodical inspections, monthly testing and preventive maintenance services. The service routines are based on the International Maritime Organization (IMO) performance testing and land approval standards for fire safety systems and manufacturers’ instructions.

Latest news

21 Mar 2017
Marioff’s HI-FOG® Electric Pump Unit Receives VNIIPO Certification
17 Mar 2017
Marioff Releases the Upgraded Version of the New HI-FOG® Electric Pump Unit (EPU)
12 Dec 2016
Marioff Launches New HI-FOG® Electric Pump Unit Website