Explosion Proof Chain Hoist

Explosion proof chain hoist is a kind of light and small lifting equipment. The electric chain hoist is composed of motor, transmission mechanism and chain wheel. The lifting capacity is generally 0.1-60 tons and the lifting height is 3-120 meters. It is an ideal equipment for lifting, transporting, loading and unloading goods and workpieces. It is also suitable for climbing frame, climbing formwork lifting and group crane of large weight in the field of construction engineering.

It is widely used in factories, warehouses, wind power generation, logistics, wharf, construction and other industries. It is used for lifting or loading and unloading goods. It can also lift heavy objects to facilitate work or repair large machines.

Brief introduction

Explosion proof grade: gas ex D IIB T4 GB

Suitable for factory environment: class IIB T4 temperature zone 1 or zone 2

Allowable surface temperature of equipment: t ≤ 135 ℃

Ex: explosion proof sign

d: Flameproof type

IIb: refers to class IIB of class II (explosion-proof for plant), class II: all electrical equipment for explosive gas environment except coal mine and underground. Class II is divided into IIA IIB IIC. The equipment division marking IIb is applicable to the service conditions of IIA equipment, and iic can be applied to the service conditions of IIA and IIB.

T4: temperature group

The explosion proof chain hoist is mainly divided into IIA, IIb and IIC protection grades, and the temperature group is T1-T4 combustible gas or explosive gas mixture composed of steam and air.

Explosion proof chain crane can be divided into grade B and grade C. It is generally applicable to zone 1 and zone 2. The applicable temperature is mainly from T1 to T6, which is a high temperature limit.

For example, D IIC T4 represents: D stands for flameproof type. II stands for class II explosion-proof, i.e. factory explosion-proof. C means that it can be used in class C explosion-proof area and also can be used in dangerous area. T4 represents the temperature group. At present, the explosion-proof electric hoist with D IIC T4 grade is more.

Dangerous gases are ex IIB T4 ethane, propane, butane, heptane, ethylene, carbon monoxide, gasoline, acetone, styrene, toluene, benzene, methanol, ethanol, vinyl chloride, acetaldehyde, etc.

Ex iict4 hydrogen, water gas and gas other than ex IIB T4.

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