The QB Type Explosion-proof Overhead Crane with Hook is a special bridge crane designed for flammable and explosive hazardous environments, with a lifting capacity range of 5-100/30T. The explosion-proof performance of all motors and electrical appliances conforms to GB3836.2-2000 flameproof type “d”, and the complete crane performance conforms to JB/T5897-2006 Explosion-proof Bridge Crane. With ExdIIBT4 and ExdIICT4 explosion-proof marks, it is suitable for IIB or IIC gas groups, T1-T4 temperature classes, and Zone 1 or Zone 2 hazardous areas.
Product Features：
1. Designed for Flammable and Explosive Environments
The QB explosion-proof overhead crane with hook is suitable for industrial areas where flammable gas or vapor mixed with air may form explosive atmospheres, especially Zone 1 or Zone 2 hazardous areas.
2. Explosion-proof Performance in Compliance with Standards
The explosion-proof performance of motors and electrical appliances conforms to GB3836.2-2000 flameproof type “d”, and the complete crane performance conforms to JB/T5897-2006 Explosion-proof Bridge Crane.
3. ExdIIBT4 / ExdIICT4 Explosion-proof Marks
The crane is available with ExdIIBT4 and ExdIICT4 explosion-proof marks, suitable for IIB or IIC gas groups and T1-T4 temperature classes.
4. Hook Lifting Device for Wide Applications
With a hook as the lifting device, the crane can be used for lifting equipment parts, packaged materials, chemical containers, and maintenance components in hazardous environments.
5. Medium-duty Working Design
According to the catalog, this crane is designed for medium-duty operation, providing stable and reliable material handling in hazardous areas.
6. Explosion-proof Electrical System
The crane can be equipped with explosion-proof motors, electrical control systems, limit switches, and lighting systems to reduce ignition risks in hazardous environments.
7. Custom Design Available
The crane can be customized according to hazardous area classification, gas group, temperature class, lifting capacity, span, lifting height, and control method.
Technical Specifications：
| Parameter | Specification |
|---|---|
| Product Name | QB Type Explosion-proof Overhead Crane with Hook |
| Crane Type | Explosion-proof Overhead Crane |
| Lifting Capacity | 5-100/30T |
| Lifting Device | Hook |
| Working Duty | Medium Duty |
| Explosion-proof Mark | ExdIIBT4 / ExdIICT4 |
| Hazardous Area | Zone 1 or Zone 2 |
| Gas Group | IIB / IIC |
| Temperature Class | T1-T4 |
| Explosion-proof Standard | GB3836.2-2000 |
| Complete Crane Standard | JB/T5897-2006 |
| Application | Chemical, Petroleum, Natural Gas, Pharmaceutical, Hazardous Areas |
| Customization | Capacity, Span, Lifting Height, Explosion-proof Grade, Control System |
Available Capacity Range：
| Model | Capacity |
|---|---|
| QB Explosion-proof Overhead Crane with Hook | 5t |
| QB Explosion-proof Overhead Crane with Hook | 10t |
| QB Explosion-proof Overhead Crane with Hook | 16/3.2t |
| QB Explosion-proof Overhead Crane with Hook | 20/5t |
| QB Explosion-proof Overhead Crane with Hook | 32/5t |
| QB Explosion-proof Overhead Crane with Hook | 50/10t |
| QB Explosion-proof Overhead Crane with Hook | 75/20t |
| QB Explosion-proof Overhead Crane with Hook | 100/30t |
The QB Type Explosion-proof Overhead Crane with Hook is a special bridge crane designed for flammable and explosive hazardous environments. It is mainly used in industrial areas where flammable gas or vapor mixed with air may form an explosive atmosphere. This crane is suitable for chemical plants, petrochemical facilities, natural gas plants, paint workshops, hazardous material warehouses, pharmaceutical workshops, and other areas requiring explosion-proof lifting equipment.
According to the catalog, the explosion-proof performance of all motors and electrical appliances of the QB explosion-proof overhead crane conforms to GB3836.2-2000 Explosion-proof Electrical Apparatus for Explosive Atmospheres, Part 2: Flameproof Type “d”. The complete machine performance conforms to JB/T5897-2006 Explosion-proof Bridge Crane. The crane has passed inspection by a state-appointed explosion-proof product inspection unit and obtained explosion-proof certification. The explosion-proof marks are ExdIIBT4 and ExdIICT4.
This product is applicable to places in factories where the explosive transmission capability is not higher than Grade IIB or IIC, and where flammable gases or vapors with ignition temperature groups T1-T4 form explosive mixtures with air. The applicable hazardous area is Zone 1 or Zone 2. The catalog states that the working class of this product is medium duty.
The QB explosion-proof overhead crane usually consists of a bridge frame, crane travelling mechanism, trolley, hoisting mechanism, explosion-proof electrical system, operator cabin, and safety protection devices. Compared with ordinary overhead cranes with hook, its key advantage lies in explosion-proof motors, explosion-proof electrical control, explosion-proof limit switches, and explosion-proof lighting, helping reduce ignition risks in hazardous environments and ensuring safe lifting operation.
