OVERHEAD CRANE

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Single Girder Hoist Overhead Crane

Double-girder Bridge Casting Crane

Double Girder Overhead Crane

Single-Girder Bridge Grab Crane

QB Type Explosion-proof hook Bridge Crane

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This crane is mainly used in chemical plants, oil refineries, paint workshops, gas production facilities, fireworks manufacturing, and other hazardous environments with explosive gases or dust.

Capacity:

1 t – 50 t (customizable)

Lifting Height:

6 m – 20 m (customizable based on building clearance)

Span:

7.5 m – 28.5 m customizable

Voltage/Hertz:

3 Phase 380V 50hz

Working Class:

A4, A5, A6

Explosion-proof Level:

Ex d IIB T4 / Ex d IIC T4 / Ex tD A21 IP65 T135°C (customizable based on hazardous zone classification)

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Introduction

Application Scenario

Advantages

Structural Diagram And Parameter Table

INTRODUCTION

The QB Type Explosion-Proof Overhead Crane is a heavy-duty, double-girder bridge crane specifically engineered for hazardous environments containing flammable gases, vapors, or combustible dusts. All electrical components, motors, wiring, and mechanical parts are designed with flameproof enclosures, anti-static materials, and spark-resistant configurations to prevent thermal or electrical ignition sources.

APPLICATION SCENARIO

[1] Chemical Plants – Lifting raw materials, chemical drums, reactors, and equipment in areas where flammable gases such as ethylene, propylene, or methanol vapors may be present.

[2] Oil Refineries – Handling maintenance of pumps, valves, heat exchangers, and heavy equipment in refining units with hydrocarbon gas hazards.

[3] Paint and Coating Workshops – Lifting paint drums, mixing tanks, spraying equipment, and finished products in areas with flammable solvent vapors.

[4] Gas Production Facilities – Moving equipment and materials in natural gas processing plants, hydrogen production facilities, or acetylene stations.

[5] Fireworks and Explosives Manufacturing – Handling raw materials and finished products in facilities with explosive dust or vapor hazards.

[6] Coal Chemical Plants – Lifting equipment and materials in coal gasification, methanol production, and other coal chemical processes with combustible gas risks.

ADVANTAGES

[1] Certified Explosion-proof – ATEX, IECEx, or GB certified for safe operation in hazardous zones.

[2] Spark-proof Mechanical Design – Special materials prevent sparks from friction or impact.

[3] Temperature Controlled – Surface temperatures maintained below ignition points of surrounding hazards.

[4] Regulatory Compliant – Meets international explosion-proof standards, simplifying safety inspections.

[5] Heavy Duty Construction – Double girder design with A6 duty cycle for continuous industrial use.

[6] Flexible Explosion-proof Ratings – Available for gas (Ex d IIB/IIC) or dust (Ex tD) environments.

STRUCTURAL DIAGRAM AND PARAMETER TABLE

Parameter	Specification
Working Class	A4, A5, A6
Capacity	1 t – 50 t
Span	7.5 m – 28.5 m
Lifting Height	6 m – 20 m
Lifting Speed	Main hook: 4 – 10 m/min Auxiliary hook: 6 – 12 m/min
Trolley Travelling Speed	35 – 45 m/min
Crane Travelling Speed	20 – 50 m/min
Explosion-proof Level	Ex d IIB T4 / Ex d IIC T4 / Ex tD A21 (customizable)
Temperature Class	T1 – T6 (customizable)
Control Method	Explosion-proof pendant / Explosion-proof remote radio / Cabin with purge system
Power Supply	380V / 50Hz / 3-phase
Temperature (Ambient)	-20°C to +50°C
Protection Grade	Motors: IP54 – IP65, Explosion-proof enclosure. Electricals: IP65 sealed
Suitable Zones	Gas: Zone 1, Zone 2 / Dust: Zone 21, Zone 22
Girder Type	Double girder – box-section with non-sparking coating options

NUCOLLEN CERTIFICATE

Nukollen Possesses A Wide Range Of Complete Certification Documents Including Those For Ships, Port Equipment Factories, Etc. If You Need Them, Please Feel Free To Request The Detailed Certification Files From Us.