Explosion-Proof Electric Single-Girder Suspension Crane LXB Type
The LXB Type Explosion-Proof Electric Single-Girder Suspension Crane is designed based on the LX Type, in accordance with GB3836.1-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 1: General Requirements" and GB3836.2-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 2: Flameproof Enclosure 'd'". It is designed to be used in conjunction with HB(BCD) and HBS(BMD) Type explosion-proof electric hoists. The explosion protection classes are ExdIIBT4 and ExdIICT4.
The LXB Type Explosion-Proof Electric Single-Girder Suspension Crane series is designed and manufactured in accordance with the JB/T10219-2011 "Explosion-Proof Overhead Crane with Simple Girder" standard. Based on the explosion protection measures adopted, the explosion-proof capability of the explosive mixture under standard test conditions, and the auto-ignition temperature, the design and manufacturing of this series comply with Flameproof Class 3, Group C or d. The explosion proof marking for this crane is Exd II BT4 or Exd II CT4. It is suitable for locations in factories where explosive gas mixtures formed by flammable gases or vapors with air exist, with explosion protection levels of II A, II B, II C, and temperature classes T1 to T4. Operation modes include Floor Operation, Remote Control, and a combination of Floor Operation and Remote Control.
1. Specifications & Models
Model & Parameter Overview:
- Model: LXB Type;
- Specifications: 1 ton, 2 tons, 3 tons, 5 tons, 8 tons, 10 tons. Custom Non-Standard Manufacturing available for other Lifting Capacities.
- Power: 1-18.5KW;
- Explosion Protection Class: ExdIIBT4, ExdIICT4;
- Power Supply: Three-phase 380V 50HZ (Custom Non-Standard Manufacturing available upon request);
2. Manufacturing & Inspection Standards
GB3836.1-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 1: General Requirements"
GB3836.2-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 2: Flameproof Enclosure 'd'"
GB3836.3-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 3: Increased Safety 'e'"
GB3836.4-2000 "Electrical Apparatus for Explosive Gas Atmospheres - Part 4: Intrinsic Safety 'i'"
GB12476.1-2000 "Electrical Apparatus for Use in the Presence of Combustible Dust - Part 1: Electrical apparatus protected by enclosures and surface temperature limitation - Section 1: Technical requirements for electrical apparatus"
The LXB Type Explosion-Proof Electric Single-Girder Suspension Crane is suitable for use in factory locations where explosive gas mixtures formed by flammable gases, vapors, and air exist, with explosion protection levels not exceeding Class B or Class C, and ignition temperature classes not lower than T4 (135°C). The applicable hazardous areas are Zone 1 or Zone 2. It is not suitable for Zone 0.
Hazardous Area Classification:
- Zone 0: A place in which an explosive gas atmosphere is present continuously, for long periods, or frequently for short periods under normal operating conditions.
- Zone 1: A place in which an explosive gas atmosphere is likely to occur under normal operating conditions.
- Zone 2: A place in which an explosive gas atmosphere is not likely to occur under normal operating conditions, but if it does occur, it will persist for a short period only.
3. Scope of Application
The Explosion-Proof Electric Single-Girder Suspension Crane is suitable for hoisting and transporting heavy loads safely in factory buildings where explosive mixtures formed by flammable gases, vapors, and air may be present. Additionally, this crane effectively reduces the required workshop height, leading to lower construction costs. The explosion proof marking for the Explosion-Proof Electric Single-Girder Suspension Crane is ExdeibIICT4/DIP A21 TA,T4. It can be used in environments with explosion protection levels IIB, IIC, and in dusty environments. It is widely applied in military, chemical, coal washing, and pharmaceutical industries, as well as in factories, warehouses, and storage yards, and can operate in flammable, explosive, and corrosive media environments.
The LXB Type Explosion-Proof Single-Girder Suspension Crane features a rational structure, attractive appearance, and strong explosion-proof performance. This product is suitable for environments with explosive gases or explosive dust. The operation mode is Floor Operation. The Working Environment temperature range is -25°C to +40°C.
4. Application Scenarios & Customer Cases
The Explosion-Proof Electric Single-Girder Suspension Crane is not a general-purpose product; its core value lies in being "Explosion-Proof." The customers who truly need it are not just any factory, but rather the following specific types:
▎Chemical Enterprises (Gas Explosion-Proof Scenarios)
In the raw material warehouses, reaction workshops, and filling areas of chemical plants, flammable gases are likely present in the air. We supplied two LXB Type 10-ton Explosion-Proof Suspension Cranes to a chlor-alkali chemical plant in Shandong, used for Material Handling in their liquid chlorine warehouse. Customer feedback indicated that their previous standard overhead crane could not enter this area, forcing them to rely on manual forklifts for transport, which was inefficient and high-risk. After switching to the LXB Type, its ExdIICT4 Explosion Protection Class covered the chlorine gas environment at their site. Operators use the Remote Control for remote operation, eliminating the need for personnel to enter the warehouse, significantly enhancing safety.
▎Pharmaceutical Enterprises (Dust & Gas Mixed Scenarios)
In the API workshops and solvent recovery areas of the pharmaceutical industry, there are both volatile gases like ethanol and acetone, as well as pharmaceutical powder dust. The ExdIIBT4 class of the LXB Type, combined with the Explosion-proof electric hoist, can cover such mixed explosion-proof requirements. A raw material pharmaceutical factory in Jiangsu used a 5-ton LXB Type installed in the Hoisting area of their solvent recovery workshop. It has been operating for three years without any explosion-related incidents, with annual maintenance costs under 5000 RMB.
▎Coal Washing Plants / Military / Paint & Coatings
The methane gas environments in coal washing plants, the pyrotechnics workshops in military factories, and the Class A warehouses in paint factories – these scenarios are all within the coverage of the LXB Type. Particularly for Retrofit projects with limited workshop height, the suspension structure of the LXB Type does not require corbels or Columns. It can be directly mounted onto the factory building roof trusses, saving 20%~30% on civil construction costs compared to a Bridge Crane of equivalent Lifting Capacity.
5. Explosion-Proof Suspension Crane Structure Diagram
6. Technical Parameters
| Hoisting / Lifting Weight Lifting capacity | 0.5,1,2,3,5,10 | |||
| Explosion Protection Class Explosion proof grade | dIBT4ordICT4 | |||
| Span Span(m) | 3-16 | |||
| cranetravel mechanism Crane travelling mechanism | Travel Speed Travelling speed(m/min) | 20 | ||
| Electric Motor Motor | 0.5~5t | BZDY12-4/0.4kWX2 n=1380rpm/Class | ||
| 10t | BZDY21-4/0.8kWX2 n=1380rpm/Class | |||
| Electric Hoist Electric hoist | Hoisting mechanism Lifting mechanism | Type Model | HB,BCD,BMD | |
| Lifting Speed Lifting speed(m/min) | 0.5~5t | 8,0.8/8 | ||
| 10t | 7,0.7/7 | |||
| Lifting Height Lifting height(m) | 6;9;12;18;24 | |||
| travel mechanism Travelling mechanism | Travel Speed Travelling speed(m/min) | 20 | ||
| Electric Motor Motor | Explosion-proof Conical Rotor Motor Taper type Rotor motor | |||
| Duty Cycle Working system | Intermediate grade Intermediate Fc=25% | |||
| Power Supply Power | Three-phase ACThree-phase AC380V 50Hz | |||
| Wheel Diameter Diameter of the wheel | 0.5~5t | 134 | ||
| 10t | 154 | |||
| Applicable toCrane RailI-Beam Applicable track I-steel | 0.5~5t | 120a~145c | ||
| 10t | 140b~163c | |||
7. Why Choose Kelude Heavy Industry
An explosion-proof crane is not a standard off-the-shelf product. Selection, customization, installation, and acceptance all differ from those of a standard overhead crane. Kelude Heavy Industry has deep experience in this field, and we do three things differently:
- Proven expertise in matching explosion-proof components: The key to the LXB Type lies in the explosion-proof matching of the electric hoist and motor. The HB, BCD, and BMD explosion-proof hoists each have different parameters, mounting dimensions, and wiring layouts for the LXB Type. Choose the wrong mounting dimension, and the explosion protection class is compromised. Our approach is to supply the hoist, motor, and electrical control as a fully matched set, so our customers don't have to piece components together themselves.
- No extra charge for non-standard customization: Parameters such as crane rail length, lifting height, and span can be customized at no additional cost within our standard ranges (span 3–16 m, lifting height 6–24 m). Many customers change parameters during the procurement phase; we simply revise the drawings accordingly at no charge.
- Complete explosion-proof documentation: Every LXB Type comes with an Explosion Proof Certificate, a GB3836 test report, and JB/T10219 Factory Acceptance Test records. These documents are mandatory for chemical and pharmaceutical customers when undergoing safety assessments or factory audits.
If you are comparing explosion-proof crane solutions, or are unsure which explosion protection class your environment requires, contact us directly. Send us the gas/dust parameters from your site, and we'll help you determine the right classification. There is no charge until the solution is confirmed.
FAQ
Q: What is the difference between the LXB Type explosion-proof electric single-girder suspension crane and a standard LX Type suspension crane?A: The core difference is explosion-proof capability. The LXB Type is designed to the GB3836 standard based on the LX Type, and is equipped with an explosion-proof electric hoist (HB/BCD/BMD series) and an explosion-proof conical rotor motor. It achieves an explosion protection class of up to ExdIICT4, making it suitable for chemical, pharmaceutical, coal washing, and other facilities with explosive gases or dust. The standard LX Type, by contrast, has no explosion-proof capability and is only for use in conventional environments. In terms of price, the LXB Type costs more than the LX Type due to the explosion-proof components.
Q: How do I choose between ExdIIBT4 and ExdIICT4 explosion protection classes?
A: It depends on the gas classification at your site. ExdIIBT4 is suitable for IIA and IIB gas environments (e.g., ethylene, propane), while ExdIICT4 covers IIC gases (including more flammable gases such as hydrogen and acetylene) and offers broader compatibility. If you are unsure of your site's gas classification, we recommend choosing ExdIICT4 for extra margin — the price difference is minimal, but the applicability is wider. Temperature class T4 (≤135°C) meets the temperature requirements of the vast majority of chemical plants.
Q: How much does an LXB Type explosion-proof suspension crane cost? How do I contact the manufacturer?
A: The price depends on lifting capacity and span. A 1-ton unit starts at approximately ¥15,000, and a 10-ton unit is approximately ¥80,000–120,000 (including the explosion-proof electric hoist). Crane rail length and lifting height can be customized. Henan Kelude Heavy Industry supplies directly from the factory, with selection guidance and after-sales installation support. Contact us directly for a quotation and proposal.
