Explosion Proof Hoist

Explosion Proof Wire Rope Hoist | ATEX & IECEx Certified
Engineered by Henan Hengkun Crane for Hazardous Environments

Brand: Henan Hengkun Crane Co., Ltd.
Applications: Oil refineries, chemical plants, gas storage facilities, mining operations, and other hazardous areas classified under Zone 1/21, Zone 2/22 requiring intrinsically safe lifting solutions for flammable gases, vapors, or combustible dust.

Defying Risks, Delivering Reliability

In chemical plants, oil refineries, grain silos, or mining facilities - where flammable gases, vapors, or combustible dust lurk - standard hoists become ignition hazards. Henan Hengkun’s Explosion Proof Hoist is intrinsically engineered to suppress sparks, limit surface temperatures, and contain internal explosions. Certified to ATEX, IECEx, and GBEx standards, it ensures safe lifting in Zone 1/21, Zone 2/22 hazardous areas, protecting both personnel and critical assets.

Core Safety Engineering

Explosion Protection	Technical Implementation
Spark-Free Operation	- All motors, brakes, controls in flameproof enclosures (Ex d) - Non-sparking copper alloy gears & brake shoes
Surface Temperature Control	- T-class rated motors (T1-T4) - Optimized heat dissipation fins - Thermal sensors with auto-shutdown
Explosion Containment	- Cast iron/enameled aluminum enclosures (IP66) - Reinforced joint flanges (gap ≤0.2mm) - Pressure relief vents
Static Electricity Prevention	- Conductive rubber wheels - Grounding brushes on trolley - Anti-static epoxy paint (Surface resistance <10⁹Ω)

Technical Specifications

1. Certifications & Compliance

• Explosion Standards: ATEX 2014/34/EU (II 2G Ex db IIC T4 Gb / II 2D Ex tb IIIC T135°C Db), IECEx, GB 12476.1

• Safety Systems: Dual brake (main + emergency), phase loss/overload protection, limit switches (IP65 rated)

• General Cert: CE, ISO 9001, SIL 2 (optional)

2. Performance Parameters

Hoist Model	HEK-EP 5t	HEK-EP 10t	HEK-EP 16t	HEK-EP 20t
Capacity	5 tonnes	10 tonnes	16 tonnes	20 tonnes
Lift Speed	8 m/min	7 m/min	5.5 m/min	4.5 m/min
Work Class	FEM 2m / ISO M5	FEM 2m / ISO M5	FEM 3m / ISO M6	FEM 3m / ISO M6
Motor Protection	Ex d IIC T4	Ex d IIC T4	Ex d IIC T4	Ex d IIB T4
Duty Cycle	40% ED	40% ED	40% ED	40% ED
Ambient Temp	-25°C to +40°C	-25°C to +40°C	-25°C to +40°C	-25°C to +40°C

3. Material & Construction

• Enclosure: Cast iron (Ex d) / Aluminum alloy (Ex de) for corrosion resistance

• Gearbox: Hardened alloy steel, oil-bath lubricated

• Wire Rope: Galvanized with non-sparking thimble (ISO 2408)

• Control Pendant: Ex-de certified, impact-resistant polycarbonate

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Critical Applications

• Oil & Gas: Drilling platform lifting, refinery maintenance

• Chemical: Reactor installation, solvent handling

• Grain/Powder: Flour mills, coal handling plants (combustible dust)

• Pharma: Ethanol-based production zones

• Mining: Underground shaft equipment handling

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Why Hengkun’s Explosion Proof Hoist?

1. Precision Safety Engineering

• Gas Group Adaptation: Configurable for IIC (hydrogen) or IIB (ethylene) risks

• Dust-Specific Designs: Optional hoists for Zone 21/22 (Ex tD A21 TA/TB)

• Zero Static Accumulation: Full grounding circuit tested at 10 mA

2. Maintenance & Longevity

• Quick-Access Enclosures: Hinged motor/gearbox covers for inspection

• Corrosion Defense: Stainless steel fasteners + epoxy coating (C4-M)

• Modular Components: Swappable brake assemblies, gear clusters

3. Smart Control Integration

• Explosion Proof VFD: For soft-start & speed control (optional)

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Case Study: South African Gold Mine

Challenge
Lift 12T ore skips in 95% methane atmosphere (Zone 1)

Solution

• 8× HEK-EP16T hoists with:
  → Ex d IIC T4 certification
  → Dual-path grounding system
  → Anti-abrasion wire ropes

Result
▸ Zero ignition incidents in 24 months
▸ 42% longer maintenance intervals
▸ Full compliance with MHSA regulation

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Request Your Hazardous-Area Solution

✓ Free Zone Classification Review
✓ Customized Ex-Proof Hoist Design
✓ ATEX/IECEx Documentation Package