How to Choose Between Suspended Heptafluoropropane and Suspended Ultra-Fine Dry Powder Systems

　　We know that suspended-type heptafluoropropane and suspended-type ultra-fine dry powder both belong to fire suppression systems, but in fact, they are two distinct types of fire-extinguishing systems—heptafluoropropane is a gas-based system, while ultra-fine dry powder relies on dry powder technology. However, since both are available in suspended configurations, today we’ll take a closer look at how they compare.

　　Hanging-type heptafluoropropane is an application form of the heptafluoropropane fire suppression agent. Its key features include excellent fire-extinguishing performance, combined with a compact, lightweight, and easy-to-install design. It comes in three control modes for discharge: temperature-controlled, electrically controlled, and electro-thermal dual-control. This makes it particularly suitable for small spaces or localized protection zones designed to safeguard specific areas. Additionally, heptafluoropropane boasts advantages such as being non-damaging to equipment, offering superior electrical insulation, and delivering a long spray range. Importantly, as long as the concentration remains within the system’s designed limits, hanging-type heptafluoropropane poses no harm to humans—since the typical lower design concentration for this agent is 7%, whereas the safe exposure level for humans is up to 9%. Leveraging heptafluoropropane’s remarkable non-conductive properties, it is especially well-suited for installation in critical areas like machine rooms, computer rooms, or server rooms. Moreover, when heptafluoropropane reaches a certain concentration within the protected zone, it can even help suppress potential explosions.

　　As for suspended ultra-fine dry powder, this type of powder is typically categorized into BC-class or ABC-class dry powders, which are slightly alkaline or slightly acidic, respectively. Compared to conventional dry powders, ultra-fine dry powder features significantly smaller particle sizes—often ranging from one-tenth to one-hundredth the diameter of ordinary particles. Suspended ultra-fine dry powder comes in two main forms: pressurized and non-pressurized, making it suitable for a variety of applications. Notably, suspended ultra-fine dry powder boasts superior fire-extinguishing efficiency and broader applicability across different environments. In fact, its extinguishing speed can be up to ten times faster than that of heptafluoropropane. Additionally, it’s more cost-effective than gas-based fire suppression systems. However, this technology also has significant drawbacks. For instance, it generates substantial dust during deployment, which can be challenging to clean up afterward. Moreover, the airborne dust settles relatively quickly and loses its mobility once it lands. Importantly, suspended ultra-fine dry powder performs poorly when obstructed by barriers, as these can impede its ability to reach and suppress the fire effectively. Perhaps most critically, ultra-fine dry powder is not recommended for use in areas frequented by people or where electronic equipment is abundant. Inhalation of the powder could pose serious health risks, while the fine particles easily infiltrate sensitive electronics, increasing the likelihood of malfunctions and damage.

　　This is precisely the difference between suspended-type heptafluoropropane and suspended-type ultra-fine dry powder systems. The former excels in protection zones with numerous computer rooms, server stations, or electronic devices, while the suspended-type ultra-fine dry powder system is better suited for unmanned areas—particularly in urban underground utility tunnels, where it can deliver even greater effectiveness.