2T Ex-proof Electric Hoist ExdⅡBT4 for Rubber Factory Thailand

1. General Overview

The Yuantai Explosion‑Proof Electric Chain Hoist is a heavy‑duty lifting solution specifically engineered for safe operation in flammable and explosive environments. Designed and manufactured in strict compliance with Chinese national explosion‑proof standards (GB3836 series) , this hoist range covers capacities from 1 ton to 32 tons, making it suitable for a wide spectrum of industrial applications where conventional hoists pose a safety risk.

All models feature flame‑proof (隔爆型) construction, with all electrical components – including motors, control boxes, switches, and braking systems – fully enclosed in explosion‑proof housings to prevent any internal spark or hot gas from igniting the surrounding atmosphere. The hoists are available with single‑speed, dual‑speed, or variable‑frequency drive (VFD) control options, and can be configured as hook‑mounted (fixed) , trolley‑mounted, or ultra‑low headroom versions to suit different installation requirements.

Key common specifications:

• Power supply: AC 380V / 50 Hz, 3‑phase

• Control voltage: AC 36V (safe low voltage)

• Insulation class: F

• Working level: M5

• Ambient temperature range: –20°C to +40°C

• Safety features: Overload clutch, dual upper‑limit switches, emergency stop

2. Explosion‑Proof Certification & Standards

Yuantai explosion‑proof hoists are designed, manufactured, and tested in accordance with the following Chinese national standards:

The hoists have successfully passed the explosion‑proof performance tests conducted by China's authoritative testing bodies and have been issued the mandatory Chinese Explosion‑Proof Certificate (防爆合格证) . As explosion‑proof electrical products, they also comply with China Compulsory Certification (CCC) requirements for explosion‑proof equipment.

Explosion‑proof markings available:

• Ex db IIB T4 Gb – for IIB gas environments

• Ex db IIC T4 Gb – for IIC gas environments (highest gas group)

• Ex tb IIIC T130°C Db – for explosive dust environments

3. Technical Specifications (1–32 Tons)

The following table summarises the key parameters for the explosion‑proof hoist range. Please note that actual specifications may vary depending on the specific model, chain‑fall configuration, and control option selected.

For detailed capacity‑specific parameters (lifting speeds, motor powers, chain falls, and dimensional data), please refer to the standard DCEK/DCER series parameter tables, as the explosion‑proof versions share the same mechanical performance characteristics.

4. Explosion‑Proof Classification Explained

Understanding the explosion‑proof marking is essential for selecting the correct hoist for your hazardous area:

Suitable hazardous areas:

• Gas environments: Zone 1 and Zone 2 (explosive gas atmospheres)

• Dust environments: Zone 21 and Zone 22 (explosive dust atmospheres)

Typical applicable gases (IIB): Ethane, propane, butane, ethylene, propylene, acetone, benzene, toluene, methanol, ethanol, gasoline vapour, etc.

Typical applicable gases (IIC): Hydrogen, acetylene, carbon monoxide, water gas, etc.

5. Design & Safety Features

• Flame‑proof construction – All electrical components (motor, control box, switches, brakes) are enclosed in flame‑proof housings that can withstand internal explosion pressure and prevent flame propagation.

• Non‑sparking materials – External explosion‑proof components are manufactured from special non‑sparking materials to eliminate ignition sources.

• High‑strength alloy chain – Hardened for excellent wear resistance and long fatigue life.

• Overload protection – Built‑in mechanical clutch prevents operation beyond the maximum rated load.

• Dual upper‑limit switches – Primary and secondary limits ensure safe stopping at the top of travel.

• Low‑voltage pendant control (AC 36V) – Maximises operator safety in hazardous areas.

• Optional radio remote control – For enhanced operational flexibility while maintaining safe distance.

6. Applications

Yuantai explosion‑proof hoists are ideal for lifting operations in industries where flammable gases, vapours, or combustible dusts are present:

• Petrochemical & refining plants

• Chemical & pharmaceutical manufacturing

• Oil & gas extraction and storage facilities

• Paint & coating production lines

• Grain & flour processing (dust‑explosion hazards)

• Coal processing & handling facilities

• Munitions & defence industries

7. Configuration Options

Yuantai offers extensive customisation to meet specific site requirements:

• Mounting types: Hook‑mounted (fixed), trolley‑mounted (motorised travel), or ultra‑low headroom

• Control options: Single‑speed, dual‑speed, or VFD

• Explosion‑proof等级: Ex db IIB T4 Gb or Ex db IIC T4 Gb (gas); Ex tb IIIC T130°C Db (dust)

• Lifting height: Customisable from 6 m to 45 m and above

• Voltage: Alternative voltages available upon request

• Environmental protection: Weather‑proof or corrosion‑resistant coatings available

8. Quality Assurance & Certification

Every Yuantai explosion‑proof hoist undergoes rigorous quality control and testing before delivery:

• Designed and manufactured to GB3836 series and JB/T 10222 standards

• Certified by China's national explosion‑proof testing authorities (e.g., CQST, NEPSI, PCEC)

• Holds valid Chinese Explosion‑Proof Certificate (防爆合格证)

• Complies with China Compulsory Certification (CCC) for explosion‑proof electrical products

• ISO 9001:2015 quality management system certified

Conclusion

The Yuantai 1–32 Tons Explosion‑Proof Electric Chain Hoist delivers safe, reliable, and efficient lifting in the most demanding hazardous environments. Built to Chinese national explosion‑proof standards (GB3836) and backed by official Chinese explosion‑proof certification, these hoists provide the peace of mind that comes with rigorous compliance and proven performance. With a broad capacity range, multiple configuration options, and robust safety features, Yuantai explosion‑proof hoists are the trusted choice for industries where safety is non‑negotiable.

For detailed technical drawings, capacity‑specific parameters, and customised quotations, please contact Yuantai with your project requirements – including the hazardous area classification (Zone 1/2/21/22) , gas group (IIB/IIC) , and required capacity and lifting height.