The explosion-proof double-girder overhead crane is a specially designed overhead crane. This crane is primarily used in hazardous, flammable, and explosive environments, offering high safety and reliability.
It consists of dual main beams, end beams, the lifting mechanism of the hoist trolley, running mechanism, and electrical control system. Additionally, it is equipped with a cabin, safety devices, rails, explosion-proof components, and auxiliary equipment.
The explosion-proof overhead crane is suitable for places with a hazardous environment where the explosion-proof rating is not higher than IIB or IIC, and the explosion temperature group is between T1 and T4. These locations are where flammable gases or vapors create explosive gas mixtures with air.
Equipment installation, maintenance, and material handling in flammable and explosive environments.
Handling and installation of heavy equipment in gas and dust environments.
Transporting raw materials and products in areas with high explosion-proof requirements.
Primarily used for material handling in dust-explosive environments.
Handling and installation of large components in flammable and explosive areas.
Installing and maintaining equipment in flammable and explosive environments.
Transporting hazardous goods in warehouses with high explosion-proof requirements.
This is the specification table for a 30-50ton lifting capacity crane. We also offer customized cranes with different lifting capacities. Feel free to contact us for more information!
| Lifting capacity | Main hook | t | 32 | 50 | ||||||||||||||
| Auxiliary hook | 5 | 10 | ||||||||||||||||
| Span | 10.5 | 13.5 | 16.5 | 19.5 | 22.5 | 25.5 | 28.5 | 31.5 | 10.5 | 13.5 | 16.5 | 19.5 | 22.5 | 25.5 | 28.5 | 31.5 | ||
| Lifting height | Main hook | m | 16 | 12 | ||||||||||||||
| Auxiliary hook | 18 | 16 | ||||||||||||||||
| Work Duty | A4 | A4 | ||||||||||||||||
| Explosion-proof grade | ExdlIBT4(ExdIICT4) | ExdlIBT4(ExdlICT4) | ||||||||||||||||
| Speed | Main hoisting | 4.1 | 3 | |||||||||||||||
| Auxiliary hoisting | m/min | 5 | 5 | |||||||||||||||
| Crane traveling | 17.5(13) | 15.1(15.1) | ||||||||||||||||
| Trolley traveling | 19.1(12.4) | 17(14.5) | ||||||||||||||||
| Max.Wheel Loading | kN | 138 | 146 | 152 | 166 | 173 | 185 | 194 | 203 | 160 | 167 | 176 | 189 | 197 | 209 | 220 | 229 | |
| Total motor power | kw | 42.2(40.7) | 50.9(49.1) | 53.9(49.1) | ||||||||||||||
| Crane Rail Recommended | QU70 or square steel 90 | QU80 or square steel 100 | ||||||||||||||||
| Power Supply | 3-Phase A.C.50HZ380V | |||||||||||||||||
1. Industry Position
Founded in 2006, Dafang Heavy Machinery covers an area of 1,580 acres and employs over 2,600 people. With an annual sales revenue of 3.566 billion RMB, the company focuses on two main business sectors: lifting machinery and steel structures. Major products include single and double girder bridge and gantry cranes, electric hoists, steel structure bridges, prefabricated buildings, and industrial plants. Dafang serves critical sectors such as military industry, aerospace, nuclear power, offshore engineering, metallurgy, and mining. Its products are exported to over 100 countries and regions, including the United States, Russia, and Southeast Asia.
Annually, Dafang manufactures 30,000 single-girder cranes, more than 12,000 double-girder and gantry cranes, and 30,000 electric hoists. Based on production scale, sales volume, and brand recognition, the company ranks among the top three in China’s crane industry.
2. Core Technologies
Dafang’s R&D team consists of over 260 members, including 104 with senior or intermediate engineering qualifications. The company invests 3.8% of its annual sales into technology development. It has obtained 12 international invention patents, 50 national invention patents, 415 utility model patents, and achieved 43 scientific and technological milestones. Dafang was the first in the industry to adopt anti-sway and automatic positioning technologies.
In 2016, Dafang became the first enterprise in Henan Province to implement smart crane applications and to introduce remote monitoring technology. The company also developed the multifunctional brewing crane, filling a domestic market gap. In 2021, Dafang was the first in the industry to be certified for unmanned intelligent cranes. In 2022, it undertook a project for a tower crane at a commercial satellite launch site.
3. Manufacturing Capability
Dafang Heavy Machinery is equipped with advanced in-house designed manufacturing equipment, including 1,500-ton press grooving machines, extrusion machines, and roller machines. The company has established leading domestic workshops, including an electrical assembly line, steel pre-processing line, paint finishing line, and China’s first practical single-girder lean production line. Precision machinery includes imported German NILES CNC gear grinding machines and Japanese MAZAK machining centers.
Dafang strictly follows refined manufacturing processes, adhering to the principle of “doing it right the first time, zero defects.” This commitment to quality is deeply ingrained in every employee, ensuring that every product delivered meets the highest standards.
4. Service Assurance
Dafang upholds a “comprehensive, high-quality” service standard, providing users with fast, attentive, and thorough one-stop services. With 24/7 online support, choosing Dafang means complete peace of mind. Just tell us what you need—we’ll take care of the rest.
Our explosion-proof double girder bridge cranes use explosion-proof electric hoists and electrical components to ensure safe operation in flammable and explosive environments. Each component is rigorously tested and certified to meet explosion-proof standards, ensuring worry-free operation in high-risk environments.
The explosion-proof double girder bridge crane features a double girder design, which is robust enough to handle large-tonnage loads. We use high-quality materials and components to ensure long-term stable operation in harsh environments, maximizing the service life of the equipment.
The explosion-proof double girder bridge crane is suitable for environments where explosive gases or vapors are present, such as petrochemical plants, coal mines, pharmaceutical factories, and food processing plants. These industries have high safety requirements, and our cranes fully meet these demands, ensuring production safety and efficiency.
Yes, we offer customization services and design and manufacture according to the specific needs of the client. Whether it is lifting height, load capacity, or specific electrical control systems, we can tailor the equipment to meet the client's requirements, ensuring optimal performance in specific working environments.
Our explosion-proof double girder bridge cranes are designed with ease of maintenance and upkeep in mind. The equipment is equipped with an intelligent diagnostic system that monitors the equipment's status in real-time, providing early warnings of potential faults, reducing downtime, and improving the reliability and efficiency of the equipment.
