HI-FOG® system types

HI-FOG® is very flexible, allowing for a wide range of configurations. Each configuration may contain one or more of the following types of systems.

A typical HI-FOG® system layout

Wet pipe system

Wet pipe system uses automatic sprinklers attached to a piping system containing water and connected to a water supply so that the water discharges immediately from sprinklers operated by the heat from a fire. Wet pipe systems are typically used in accommodation and similar areas with solid combustibles.

Source: NFPA 750 Standard on Water Mist Fire Protection Systems

Deluge system

A deluge system is a water mist system using open spray heads attached to a piping system that is connected to a water supply through a valve that is opened by means of a detection system installed in the same area as the spray heads. When the valve opens, water flows into the piping system and discharges through all spray heads attached to the system. Deluge systems are typically used for the protection of machinery with flammable liquid fire hazard.

Source: NFPA 750 Standard on Water Mist Fire Protection Systems
Dry pipe system

Dry pipe water mist system uses automatic sprinklers attached to a piping system containing compressed air. The bulb of the sprinkler breaks when the ambient temperature reaches its treshold temperature. Pressure drops in the piping network filled with compressed air. Dry pipe valve opens, and releases water to the sprinklers. Dry pipe systems are typically used in spaces subject to freezing.

Source: NFPA 750 Standard on Water MIst Fire Protection Systems

Pre-action system

The pre-action water mist system uses automatic sprinklers attached to a piping system containing air, with a supplemental detection system installed in the same areas as the sprinklers. System activation requires both a signal from the detection system and the heat activation of a sprinkler. Pre-action systems are used to protect areas where the risk of false discharge or leakage must be kept to an absolute minimum.