ZT Standard Explosion-Proof Electric Wire Rope Hoists are specially designed for flammable and explosive environments. Adopting flameproof structure, all key components undergo special flameproof treatment, completely isolating internal potential electric sparks and high temperature inside the flameproof enclosure, eliminating the risk of igniting external explosive mixtures at the source. It is applicable to three gas explosion-proof grades: dIIA, dIIB and dIIC, and widely used in hazardous sites with explosive gas or dust, such as chemical raw material warehouses, petroleum storage yards and chemical pump houses.
Explosion-Proof Electric Wire Rope Hoists Specifications
- Lifting Capacity: 1–32 t
- Lifting Height: 6–30 m
- Protection Class: IP55–IP65
- Explosion-Proof Type: d (Flameproof)
- Ambient Temperature: -25℃ ~ 40℃
Advantages & Features of Explosion-Proof Electric Wire Rope Hoists
- Adopts reinforced flameproof enclosure. All live components including motor, electrical parts and control box are equipped with thickened flameproof housings, capable of withstanding internal explosion pressure without damage.
- Spark-free design, suitable for flammable, explosive, dusty, corrosive acid electroplating and mixed gas environments.
- Easy maintenance: High interchangeability of parts shortens maintenance time and improves production efficiency.
- High safety and high protection grade: Normally above IP5, preventing ingress of dust and moisture. It enables accurate and safe movement as well as heavy load lifting and transportation in hazardous environments.
Core Components of Explosion-Proof Electric Wire Rope Hoists
Explosion-proof Motor
- Fully enclosed flameproof (Ex d) explosion-proof asynchronous motor.
- Cast aluminum alloy housing with copper heat dissipation structure and precisely machined flameproof surfaces.
- High-strength cast aluminum alloy shell, Class F insulation (maximum permissible temperature: 155°C).
Explosion-Proof Electrical Control Box
- Adopts dual isolation of flameproof enclosure and flame path to eliminate external ignition risks.
- Maximum protection grade up to IP65, fully dust-tight and jet-proof.
- Equipped with dedicated explosion-proof components entirely, optimizing heat dissipation performance of parts.
Reducer
- Integrated housing design with hardened tooth surface gears (tooth surface hardness ≥60HRC).
- High transmission efficiency of over 95%, service life 2–3 times longer than conventional soft tooth surface reducers.
Assemblage de crochet
- Special spark-proof surface treatment, no sparks generated during impact and friction.
- Made of high-strength alloy steel or stainless steel.
- Safety latch adopts stainless steel material to avoid sparking from collision with the hook head; with stronger spring elasticity for more reliable anti-drop protection.
Applicable Environments of Explosion-Proof Electric Wire Rope Hoists
Refined Oil Storage Area in Petrochemical Plants
The area stores refined oil such as gasoline and diesel with severe oil gas volatilization. Being heavier than air, the oil gas tends to accumulate near the ground. The explosion-proof hoist can safely perform full-process operations including daily loading and unloading, tank maintenance and emergency rescue in high-risk oil and gas environments. It fundamentally eliminates three major ignition sources: electric sparks, friction sparks and static accumulation, building a solid final line of defense for safe production in the storage area.
Flour Mill Workshop
Suspended combustible dust in the air of flour workshops easily forms explosive dust clouds and triggers explosions. The explosion-proof hoist is applicable to dust explosive environments to complete full-process operations such as raw material conveying, equipment maintenance and finished product transportation.
Paint Manufacturing Workshop
A large number of volatile organic solvents such as toluene, xylene and ethyl acetate are used throughout the production process. Local concentration often reaches the explosive limit during paint mixing, batching and filling. The explosion-proof hoist can safely carry out full-process operations including raw material feeding and finished product handling in environments with high-concentration organic solvent vapor.
Underground Coal Mine
Underground mines face dual explosion hazards of gas and coal dust. With confined space and poor ventilation, flammable gas is prone to local accumulation at roadway tops and dead corners. The explosion-proof hoist can safely conduct operations such as equipment installation, material transportation, roadway support and emergency rescue in environments with gas and coal dust explosion risks.
How to Select Explosion-Proof Electric Wire Rope Hoists
The selection of explosion-proof hoists is an indispensable safeguard for safe production in high-risk environments. Improper selection will not only fail safety supervision inspection and acceptance, but also leave permanent explosion hazards, directly endangering personal safety and property.
Before selection, identify the type of explosive medium and hazardous area classification of the operating environment (Zone 1 / Zone 2 for gas environments, Zone 21 / Zone 22 for dust environments), then select the corresponding explosion-proof grade by referring to the table below.
| Explosion-proof marking | Temperature Group T1 | Temperature Group T2 | Temperature Group T3 | Temperature Group T4 |
| II A | propane, ethane, carbon monoxide, acetone, acetic acid, ammonia, pyridine, etc | alcohol, butane, ethylene, acetic ester, dichloroethane, vinyl chloride, chloroethanol, dimethylamine, etc | pentane, decane, turpentine, naphtha, petroleum (including automobile fuel oil), fuel oil, amyl alcohol, etc | acetaldehyde, trimethylamine, etc |
| II B | allylene, acrylonitrile, hydrogen cyanide, coal gas, etc | ethylene, epoxyethane, methyl acrylate, furan, etc | dimethyl ether, acrolein, hydrogen sulfide, etc | ethyl methyl ether, diethyl ether, dibutyl ether, tetrafluoroethylene, etc |
| d II C | hydrogen, water gas, coal gas | acetylene | — | — |
If you are unsure which configuration suits your working condition, please provide the explosive medium, hazardous zone classification and lifting requirements. Our engineers will offer a free one-to-one selection solution for you.
We guarantee all products are certified by the National Quality Inspection Center for Explosion-Proof Electrical Equipment. Each unit is supplied with an explosion-proof certificate bearing a unique serial number, fully traceable and verifiable. Should you require customization for special explosion-proof grades or working condition configurations, please contact our technical team.
