Explosion-proof fans

Explosion-proof fans are critical ventilation and air exchange equipment for flammable and explosive environments, such as energy storage containers, petrochemical facilities, and dust-laden workspaces. They play a central role in promptly exhausting combustible gases and maintaining environmental safety. Inside energy storage containers, lithium-ion battery modules may generate flammable and explosive gases—such as hydrogen, methane, ethylene, and carbon monoxide—due to cell overheating during charging and discharging. Explosion-proof fans must activate immediately when gas concentrations exceed safe limits to forcibly exhaust harmful gases and prevent explosions caused by gas accumulation. The recently released technical specifications for prefabricated container-based lithium-ion battery energy storage systems explicitly require that ventilation systems use explosion-proof fans and impose stricter explosion-proof requirements on electric actuators.

The automatic opening, closing, and start-stop control of explosion-proof fans rely on reliable electrically driven actuators. Our explosion-proof electric linear actuators are precision drive components specifically designed for controlling the opening and closing of ventilation louvers and air dampers in explosion-proof fans. By interfacing with flammable gas detection devices, the actuator responds rapidly when gas concentrations exceed safe limits, driving the ventilation louvers or dampers of the explosion-proof fan to open and ensuring that hazardous gases are exhausted in the shortest possible time. Featuring an integrated explosion-proof design, the actuator achieves explosion-proof performance without the need for an external explosion-proof enclosure, making it the core actuator component for the automated control of explosion-proof fans.


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Linear actuators
Introduction

System configuration

● Explosion-proof linear actuator

Key features and benefits

Integrated explosion-proof design — meets the stringent standards for explosion-proof fans

Explosion-proof fans operate in flammable and explosive environments, where all components must meet strict explosion-proof requirements. Our explosion-proof linear actuator features an integrated explosion-proof design, achieving explosion-proof performance without the need for an external explosion-proof enclosure. The explosion-proof rating complies with the Ex db II C T4 Gb classification, allowing for safe use in Zone 1 and Zone 2 hazardous locations containing Class II, Groups A and B, Groups T1–T4 flammable gases or vapors. It prevents spark leakage under overload conditions and resists ignition from open flames, eliminating the risk of electrical equipment becoming an ignition source at its source.

Wide temperature range operation — withstands extreme climate challenges

Energy storage stations and petrochemical facilities are located throughout the country—from the scorching heat and bitter cold of the northwestern Gobi Desert to the humid heat and salt fog of coastal regions. Our explosion-proof electric actuators operate stably within an extreme temperature range of -40°C to +85°C, ensuring that explosion-proof fans maintain reliable ventilation control under all climatic conditions.

High protection rating — resisting the onslaught of harsh weather

Adverse weather conditions such as sandstorms, dust storms, and torrential rain pose serious threats to the normal operation of outdoor explosion-proof fans. Our explosion-proof electric actuators feature an IP65 protection rating, effectively resisting the intrusion of sand, dust, and rain, thereby reducing safety risks caused by electrical short circuits and providing a solid guarantee for the long-term, reliable operation of explosion-proof fans.

Rapid response — seizing the golden window for exhaust ventilation

When the concentration of flammable gases inside an energy storage system exceeds safe limits, every second of delay can have serious consequences. Our explosion-proof electric actuators feature extremely fast response times; the time from when the control system issues a command to when the ventilation window is fully open is extremely short. This ensures that the explosion-proof fan initiates exhaust ventilation in the shortest possible time, significantly reducing the risk of fire or explosion caused by gas accumulation.

Multiple stroke options — flexible adaptation to different fan configurations

Different energy storage systems and chemical facilities vary in terms of explosion-proof fan vent window configurations and installation space. Our explosion-proof electric actuators offer a variety of stroke options, meeting the space requirements of different application scenarios while ensuring overall system efficiency. Their compact size and ease of installation further reduce system integration complexity and costs.

Built-in Hall sensors — empowering customers with precise control

Our actuators feature built-in Hall sensors that provide real-time feedback on the actuator's stroke position and operating status via pulse signals. The control unit of the energy storage system can use this data to precisely monitor the real-time open/closed status of the ventilation windows, enabling accurate closed-loop control. The integration of advanced sensors and intelligent control technology allows explosion-proof fans to respond in real time to environmental changes and issue timely alerts, providing a strong guarantee for the long-term stable operation of power plants and petrochemical facilities.

Richmat's engineers provide end-to-end technical support—from needs assessment and solution design to product delivery—ensuring that our reliable explosion-proof linear drive systems safeguard every ventilation cycle and every moment of safe operation.


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