Device group and Category (Zone)

    Device group

    Device group II Category + Zone



    Temperature class



    Explosion group for gas

    Gases are classified in three Explosion groups, the danger increases from explosion group II A to II C. The higher group includes the lower ones (e.g., II C includes II B and II A). The explosion group is only specified for types of protection "d", "i", "nC" and "nL".

    Type of ignition protection

    Explosive-atmosphere



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    Attachment:

    1. Generally

    The completed checklist becomes part of ALBERT’s order documentation.

    For the correct exchange of information, you as customer, receive all the information you need to correctly assess your application. At the same time you have to ask for all the necessary criteria.

    The operator must ensure: 

    • Compliance with the performance of the lifting gear or the lifting system
    • A potentially explosive atmosphere always has to be avoided. If this is not possible, the danger of explosion has to be reduced 
    • Compliance with the operating and maintenance instructions for the corresponding screw jack

    2. Explosion application areas for screw jacks– Device group and Category (Zone)

    2a. Device group I:

    Devices for use mining/underground operations as well as open-caste.

    Category Requirement Availability
    M1 Very high safety
    		 Not available
    M2 High safety Not available

    2b. Device group II:

    Devices for use in other areas which may be endangered by an explosive atmosphere.

    Category Danger Requirement Zone Group of substances Availability
    1 Constantly -frequently - ore over a longer period of time  Very high safety
    		 Zone 0 G Gas Not available
    Zone 20 D Dust
    2 Occasionally High safety Zone 1 G Gas Available
    Zone 21 D Dust
    3 Rarely and briefly Normal safety Zone 2 G Gas Available
    Zone 22 D Dust

    3 + 4. Temperature classes and Explosion groups

    Temperature class Max. surface temperature Max. ignition temperature of the substance
    		 Explosion group Availability
    IIA IIB IIC
    T1 450°C >450°C Propan Watergas Hydrogen Available
    T2 300°C >300°C Liquified gas Ethylene Acetylene
    T3 200°C >200°C Petrol Crude oil
    T4 135°C >135°C Ether Ethyl ether

    T5 – 100°C, T6 – 85°C not available

    Explosion group: The danger increases from explosion group II A to II C. The higher group includes the lower ones (e.g., II C includes II B and II A).

    The customer must always specify the ignition temperatures of the substances.

    5. Type of ignition protection

    The following types of protection apply to non-electrical equipment in potentially explosive atmospheres:

    Identification Description Standardization
    fr Flow restricting enclosure EN13463-2
    d Frameproof enclosure EN13463-3
    g Intrinsic safety EN13463-4
    c Safety design (structural safety) EN13463-5
    b Control of ignition sources EN13463-6
    p Over pressure encapsulation EN13463-7
    k Liquid immersion EN13463-8

    Executable type of ignition protection from ALBERT:  c,   ck,  (for Zone 1 und 2  ck)

    6. labeling (example)

    Ex symbol II 2 G ck T4
    II 2 D ck 135°C
    Ex-marking Device group Category Group of substances Type of ignition protection Temperature class
    2b 2b 2b 5 3

    7. Important:

    Non-compliance with the operating instructions will invalidate the declaration of conformity 94/9/EG!