How do I select the correct explosion-proof rating (Zone, Gas Group & Temp Class) for an Ex-Proof Single Girder Crane?

Selecting the proper rating depends on your facility's hazardous area classification according to IEC/ATEX standards: Hazardous Zones: Designed for Zone 1 & Zone 2 (explosive gas atmospheres) or Zone 21 & Zone 22 (combustible dust atmospheres). Gas Groups (Ex d): Suitable for Group IIA, IIB, and IIC (e.g., Hydrogen, Acetylene environments require specialized IIC protection). Temperature Classes: Ranges from T1 up to T4 (135°C limit) or T6 (85°C limit) to ensure the maximum surface temperature of motors, brakes, and wheels stays well below the ignition point of ambient gases.

What non-sparking mechanical features prevent friction sparks during crane operation?

In flammable environments, mechanical impacts can trigger disastrous sparks. Our explosion-proof single beam cranes incorporate rigorous non-sparking protection: Bronze / Copper-Plated Hooks & Wheels: Trolley wheels, crane travel wheels, and lifting hook assemblies are fitted with copper alloy/bronze plating or solid stainless steel to prevent sparks upon rail impact. Stainless Steel Wire Ropes & Guides: Uses specialized anti-friction wire ropes combined with non-metallic rope guides to eliminate steel-on-steel friction sparks. Rubber / Polyurethane Buffers: Outfitted with heavy-duty anti-static rubber buffers at end stops to cushion trolley and bridge collisions safely.

What electrical components are modified to achieve a Flameproof (Ex d / Ex e) rating?

All electrical hardware is housed within certified explosion-resistant enclosures: Flameproof Motors & Brake Units: Hoist and travel motors feature heavy cast-iron flameproof (Ex d) enclosures designed to contain any internal electrical spark without igniting the surrounding atmosphere. Intrinsically Safe / Flameproof Controls: Electrical control boxes, junction boxes, limit switches, and cable glands are sealed with Ex d/Ex e ratings. Pendant controllers and wireless remotes are intrinsically safe (Ex ia/ib). Anti-Static Power Supply: Utilizes explosion-proof flexible flat cables or enclosed anti-static conductor lines to prevent electrostatic discharge build-up.

Are Yuntian Explosion-Proof Single Girder Overhead Cranes compliant with ATEX, IECEx, or regional safety certifications?

Yes. Every explosion-proof bridge crane leaves our factory with full traceability and international compliance documentation: Certified Standards: Fully compliant with ATEX Directive 2014/34/EU, IECEx standards, and GB 3836 / GB 12476 explosion-proof machinery regulations. Factory Explosion-Proof Passport: Accompanied by official third-party test reports and certificates for each Ex-component (motors, brakes, limit switches, and control panels) required for stringent EHS site audits.

Explosion-Proof Single Girder Overhead Crane

ATEX overhead craneflameproof overhead crane

Authentication mark:

Capacity:0.5-32tons (customizable)

Lifting Height:3 – 30 m (customizable)

Voltage/Hertz:(customizable)

Brand Name: YUNTIAN

Place of Origin: Henan, China

Product manual

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Introduction

Technical Data (General Version)

Application

Features

PRODUCT INTRODUCTION

The Explosion-Proof Single Girder Overhead Crane is a specialised lifting solution engineered for safe operation in hazardous environments where flammable gases, vapours, dusts, or fibres are present. Every component—from hoist motor to electrical enclosure—is designed, manufactured, and certified to prevent the equipment from becoming an ignition source during operation. This crane is not a standard overhead crane with added guards; it is a purpose-built machine whose entire electrical and mechanical system is configured to comply with explosion-proof standards for designated hazardous zones, ensuring protection of both personnel and assets when standard industrial cranes cannot be used.

TECHNICAL DATA

Parameter	Specification
Lifting Capacity	0.5-32tons (customizable)
Span	5 – 31.5 m (customizable)
Lifting Height	3 – 30 m (customizable)
Work Duty Class	A3 – A5
Explosion-Proof Rating	IIA / IIB / IIC Class; T1–T4 (T6) Temperature Class
Hazardous Zone	Zone 1 (Gas) / Zone 2 (Gas); Zone 21 (Dust) / Zone 22 (Dust)
Hoisting Speed	7.0 m/min / 0.7 m/min (dual speed)
Explosion-Proof Motor Protection Class	Ex d IIB T4 / Ex d IIC T4
Control Method	Pendant (explosion-proof) / Wireless Remote (explosion-proof) / Cabin (explosion-proof)

HOT PRODUCTS

Ordnance & Munitions Storage

Chemical Manufacturing

Gas Stations & LPG Facilities

Pharmaceutical Manufacturing

Oil Refineries & Petrochemical Plants

Paint Shops & Coating Facilities

FEATURES

Full Explosion-Proof Protection Across All Components — The hoist motor, travel motors, brakes, electrical enclosures, limit switches, push-button pendant, and control panel are all individually certified as explosion-proof. This is a fundamental safety prerequisite for hazardous area operations.

Flameproof Enclosure Design (Ex d) — Motors and critical electrical components are enclosed in flameproof housings that can withstand an internal explosion without transmitting flame to the surrounding atmosphere.

Spark-Free Operation — Brakes use non-sparking materials and special friction pairs. Hooks, wheels, and trolleys are made of copper alloy or stainless steel to eliminate the risk of mechanical sparks during contact. Copper-plated or copper-alloy contact surfaces are standard at critical points.

Temperature Monitoring & Protection — Continuous temperature monitoring of critical motor components ensures automatic shutdown before surface temperatures exceed the ignition temperature of the surrounding gas or dust.

Standardised Safety Protection — An overload limiter and emergency stop button form the primary protection layer. Upper and lower limit switches ensure safe hoist travel, and a phase failure protection device verifies correct power sequence before motor operation.

Optional Advanced Safety Features — An emergency shutdown system enables power isolation in critical situations. Anti-collision sensors for areas where multiple cranes operate together are available as an option. Lightning and surge protection can be added for outdoor or exposed installations.

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Our products are mainly exported to South America, Southeast Asia,Africa, Russia, Turkey, Middle East countries and so on.