Types and Specification‑Selection of Hot‑Aerosol Fire‑Extinguishing Devices
Release time:
2026-07-10
Source:
Hot‑aerosol fire‑extinguishing devices become increasingly popular as compact and maintenance‑free fire‑safety solutions for sealed narrow spaces such as battery cabinets, electrical boxes and power compartments. Unlike traditional fire‑fighting equipment, they suppress fires by interrupting combustion chain reactions through fine solid‑particles produced from internal chemical reactions, without high‑pressure gas cylinders or complicated pipeline layouts. Correct selection of types and specifications decides fire‑fighting performance and equipment‑safety in practical projects.
In terms of extinguishing‑agent composition, mainstream products fall into two categories: K‑type and S‑type hot aerosol devices. K‑type products mainly adopt potassium‑salt‑based ingredients. It delivers strong fire‑suppression efficiency at lower costs. However, its residual particles are conductive and slightly corrosive, so it is fit for cable tunnels, engine cabins and non‑precision mechanical areas rather than delicate electronics. S‑type aerosol with strontium‑salt formula is the upgraded clean‑type version. It leaves far less corrosive residues and avoids short‑circuit risks, which makes it ideal for lithium‑battery compartments, data‑room cabinets and communication equipment where high‑cleanness is required. Besides, users can pick thermal‑triggered or electric‑triggered modes. Thermal‑activation starts automatically when ambient temperature rises to around 175℃ for unattended spaces, while electric‑trigger types connect with smoke detectors to achieve manual or centralized control for systematic fire‑alarm projects.
When confirming specifications, the core index is the filling weight of aerosol agents. Designers calculate required dosage based on the volume of protected space. For lithium‑battery enclosures, the recommended dosage is normally 150‑g per cubic meter; regular electric cabinets adopt 80‑120g/m³; tiny control boxes choose mini‑size 20‑g‑60‑g models as you can see from our products. Apart from filling mass, operating‑temperature range also cannot be ignored. Devices for railway or outdoor projects need to adapt to‑40℃ to +70℃ harsh environments. What’s more, the product must pass corresponding certification such as CCCF in China or EN‑standard tests for European projects like your railway project with EN50155 requirements.
In conclusion, buyers first select S‑type or K‑type according to whether protected equipment is precision‑electronics. Then they confirm agent weight against space volume and environmental conditions. Properly matched aerosol devices will provide reliable long‑term fire‑protection and avoid over‑investment or insufficient fire‑suppression capacity.
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