Explosion proof overhead crane: Single girder & double girder explosion proof overhead crane

Explosion proof overhead cranes is one type of Dongqi explosion proof cranes, which  take stainless steel or nylon crane wheels to avoid the flame by friction, besides, all the components in electrical system is of high safety by conforming to national and international standards.Dongqi explosion overhead crane is provided Dongqi with the highest level of safety, quality and reliability, which is required for hazardous environments such as oil refineries, petrochemical, paint industries, gas power plants etc.

Explosion-proof single girder overhead crane 

 Single girder explosion proof overhead crane- Dongqi  Single Girder Overhead cranes

The single girder explosion proof  overhead crane is a small single girder overhead crane with light lifting capacity, installed with anti-explosion electric hoist, with all the motors and electrical equipment of the explosion proof crane manufactured in line with international standards and regulations. The lifting capacity of the explosion proof single girder overhead crane is 1 to 20 tons and the working class is A3, and the specific parameters is shown in the following table:

Components of Explosion-proof Single Girder Overhead Crane

The explosion proof single girder overhead crane is mainly consisted of crane traveling mechanism, electrical system, bridge, explosion proof electric hoist, etc.

Explosion proof Single girder overhead crane diagram

Explosion proof double girder overhead crane

Double girder explosion proof overhead crane - Dongqi  double girder overhead crane

Explosion proof double girder overhead bridge crane is one of the various types of explosion-proof and hazardous environment material handling double girder overhead crane, with all the motors and electrical equipment of the explosion proof double girder overhead crane manufactured in line with international standards and regulations. The lifting capacity of the explosion proof double girder overhead crane is 5 to 75 tons and the working class is A4 and A5, and the specific parameters is shown in the following diagram:

Components of explosion proof double girder overhead crane

The explosion proof double girder overhead crane offered by DQCRANES is mainly consisted of bridge structure, lifting mechanism, crane traveling mechanism, electric equipment, etc.

Diagram of explosion proof double girder overhead crane

Single girder V.S. Double girder explosion proof overhead crane 

Dongqi explosion-proof overhead cranes are designed based on Ex d (flameproof enclosure) and Ex e (increased safety) with CE marking: II 2G ck Ex de IIB T4 (standard), II 2G ck Ex de IIC T4 (Special), II 2D ck Td A21 IP66 T135 (DUST).

Single Girder Explosion Proof Overhead Cranes

• Overhead crane capacity up to 20 tons
• Compact design with standard headroom electric hoist for maximum space utilization
• Minimum IP55 for electrical enclosure
• All crane motors are equipped with Insulation Class F and Temperature Rise Class B to provide a longer operational life span
• Electronic overload protection c/w warning horn
• Noise level below 85 dB(A) at full load
• Two speed control via pole changing for the hoisting motion, via inverter control for trolley and bridge motion for smooth and precise operation.
• Thermal protection for pole-changing and 3 PTC thermistors for inverter drive
• Crane brake with asbestos-free lining which activates automatically in case of power failure
• Supply Voltage: 380 V–460 V, 3 Phase, 50–60 Hz, Others upon request.

Double Girder Explosion Proof Overhead Overhead cranes

• Overhead crane capacity up to 75 tons
• Minimum IP55 for electrical enclosure
• All crane motors are equipped on the overhead crane with Insulation Class F and Temperature Rise Class B to provide a longer operational life span
• Electronic overload protection c/w warning horn
• Noise level below 85 dB(A) at full load
• Two speed control via pole changing for the hoisting motion, inverter control for trolley and bridge motion for smooth and precise operation.
• Thermal protection for pole-changing and 3 PTC thermistors for inverter drive
• Crane rake with asbestos-free lining which activates automatically in case of power failure
• Supply Voltage: 380 V–460 V, 3 Phase, 50–60 Hz, Others upon request.

Explosion proof overhead crane zoning

Hazardous areas are categorized into zones according to the assessment of the frequency of the occurrence and duration of an explosive atmosphere. A zone is an area in which an explosive gas atmosphere:

1. is present continuously or for long periods of time, Zone 0;
2. is likely to occur in normal operation, Zone 1;
3. is not likely to occur in normal operation and, if it occurs, will only exist for a short time. Zone 2.
4. Explosion Proof overhead crane Zoning: Zone 1 & Zone 2 Hazardous Areas.

Application of explosion proof overhead crane

The proof marks are Exd Ⅱ BT4 and Exd Ⅱ CT4.

Explosion proof overhead crane is applied to sites, where is not higher than the II B or II C-class, and the sites with explosive air mixture formed with inflammable gas (or steam) and air whose factory ignition temperature groups of not less than the T4 group.

DQCREANES designs and manufactures the material handling equipment for the harsh and hazardous application environments, such as, chemical plants, gas power plants, paint shops, oil refineries, and waste water treatment plants, etc.

Don’t know how to choose the right crane for your hazardous environment? Contact DQCRANES NOW to find the right material handling equipment with our engineers.

Advantages of Explosion proof overhead crane

• Innovative structure,
• Attractive appearance
• Advanced technology
• Flexible and smooth operation
• High safety and reliability

Special Features for single and double girder explosion proof overhead crane

• Explosion protection: II 2G ck Ex de IIC T4 and II 2D ck Td A21 IP66 T135 (DUST)
• Enclosure up to IP66 for protection against flammable dust or extreme weather conditions.

Why Need Explosion Proof overhead crane in Industries?

In the working environment, the inflammable and explosive materials are easily to be produced. In modern chemical industries, there are more than 80 percent factories and workshops exist explosively-substances, which makes the explosion proof overhead crane vital in case of preventing and resisting explosion in manufacturing and processing industries.
Dongqi overhead crane supplier can provide reliable solutions of explosion-proof bridge overhead cranes to customers, if you want to know more about explosion proof equipment or other Types of cranes, please feel free to contact us.