Danfoss ATEX User guide
Technical Information
ATEX certified
OMT and OMV Orbital Motor
www.danfoss.com
Technical Information
ATEX certified OMT and OMV
Revision history |
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Changed |
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June 2021 |
Removed obsolete products |
0301 |
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February 2020 |
Major revision |
0105 |
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August 2016 |
update code numbers |
0104 |
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March 2016 |
minor updates |
0103 |
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June 2015 |
Tapered shaft updated for wheel motor |
AB |
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March 2015 |
First edition |
AA |
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2 | © Danfoss | June 2021 |
BC190086485285en-000301 |
Technical Information |
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ATEX certified OMT and OMV |
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Contents |
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General Information |
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ATEX introduction............................................................................................................................................................................ |
4 |
Explosive atmosphere..................................................................................................................................................................... |
4 |
Explosion triangle....................................................................................................................................................................... |
4 |
General zone classification...................................................................................................................................................... |
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Equipment category and zones............................................................................................................................................. |
5 |
Marking of Danfoss motors..................................................................................................................................................... |
6 |
T codes / Maximum surface temperature |
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T codes and maximum surface temperature for OMT and OMV motors..................................................................... |
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Versions and code numbers |
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OMT motors..................................................................................................................................................................................... |
10 |
OMV motors..................................................................................................................................................................................... |
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Technical specification - ATEX OMT and OMV motors |
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Ambient temperature.................................................................................................................................................................. |
12 |
Oil types / Operating fluids......................................................................................................................................................... |
12 |
Mineral oils.................................................................................................................................................................................. |
12 |
Oil temperature......................................................................................................................................................................... |
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Viscosity........................................................................................................................................................................................ |
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Filtering........................................................................................................................................................................................ |
13 |
Cross list |
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OMT motor cross list..................................................................................................................................................................... |
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OMV motor cross list..................................................................................................................................................................... |
14 |
Declaration |
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© Danfoss | June 2021 |
BC190086485285en-000301 | 3 |
Technical Information
ATEX certified OMT and OMV
General Information
ATEX introduction
Hydraulic Orbital Motors are designed for mobile and stationary applications. Some motors are used in related applications, where locations are classified as hazardous areas.
The ATEX Directive 2014/34/EU specifies the minimum safety requirements for equipment intended for use in potentially explosive atmospheres in European Union member states. ATEX is derived from the French term “ATmosphères EXplosives”.
The equipment intended for use in hazardous areas are divided into two groups:
Group I: Equipment intended for use in underground parts of mines (mining equipment).
Group II: Equipment intended for use in other places than mines (non-mining equipment).
The hydraulic orbital motors are intended for use in Group II applications.
Explosive atmosphere
Explosion triangle
A “hazardous area” is defined as an area in which the atmosphere contains, or may contain in sufficient quantities, flammable or explosive gases, dusts or vapours. In such an atmosphere a fire or explosion is possible when three basic conditions are met. This is often referred to as the “hazardous area” or “explosion” triangle.
Ignitable substance (Gas)
Oxygen |
Source of ignition |
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(Spark or heat) |
P301 800
An atmosphere with the potential to become an explosive atmosphere during operating conditions and/or under the influence of the surroundings is defined as a potentially explosive atmosphere. Products covered by directive 2014/34/EU are defined as intended for use in potentially explosive atmospheres. Removing one of the elements eliminates all risk of explosion.
General zone classification
Directive 99/92/EC divides the Hazardous areas into zones and defines criteria by which products are categorized within these zones; Zone 0 / 20 is the most restrictive and Zones 1 / 21 and 2 / 22 are less restrictive. The following table describes the zones in an installation where there is a potential for explosive atmospheres. The owner of the installation must analyze and assess the area in which the explosive gas/dust mixture may occur, and if necessary must divide it into zones. This process of zoning then allows the correct plant and equipment to be selected for use in the area.
4 | © Danfoss | June 2021 |
BC190086485285en-000301 |
Technical Information
ATEX certified OMT and OMV
General Information
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Zone 2 |
Zone 0 |
Zone 1 |
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Zone 0 |
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F301 801 |
Zones |
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Presence of potentially explosive atmosphere |
Type of risk |
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Gas (G) |
Dust (D) |
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0 |
20 |
Present continuously or for long periods |
Permant |
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1 |
21 |
Likely to occur in normal operation occasionally |
Potential |
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2 |
22 |
Not likely to occur in normal operation but. If it does |
Minimal |
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occur, will persist for a short period of time |
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Equipment category and zones
Mechanical components with potential ignition sources e.g. components containing non-conductive materials or layers or components with hot surface are covered by the ATEX-directive.
Non-mining equipment for potentially explosive atmosphere is classified as:
Equipment Group II – this group comprises three categories according to the level of safety provided:
•Category 1
•Category 2
•Category 3
Category 1 equipment has the highest degree of protection – see the following below.
Degree of protection |
Protection |
Category |
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Very high |
Two independent protection measures or safe if two errors occur |
Category 1 |
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independently |
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High |
Safe in normal operation and in anticipated case of commonly |
Category 2 |
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occurring errors |
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Normal |
Safe in normal operation |
Category 3 |
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P301 802 |
These products have to fulfil all requirements in the ATEX directive, and have to be marked with the required “Ex” marking.
Equipment located in zone specified areas must fulfil the following requirements (see also the following figure):
•Category 3 – approved equipment can be installed in hazardous areas zone 2 / 22 and outside zone categorized areas.
•Category 2 – approved equipment can be installed in hazardous areas zone 1 / 21, zone 2 / 22 and outside zone categorized areas.
•Category 1 – approved equipment can be installed in hazardous areas zone 0 / 20, zone 1 / 21, zone 2 / 22 and outside zone categorized areas.
© Danfoss | June 2021 |
BC190086485285en-000301 | 5 |
Technical Information
ATEX certified OMT and OMV
General Information
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Hazards area |
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No requirements Zone 2 |
Zone 1 |
Zone 0 |
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ATEX |
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Catagory |
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Directive |
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Equipment |
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Catagory |
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group II |
2 |
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Catagory
1
P301 803
Marking of Danfoss motors
The Danfoss OMT/V motors are marked for application in gaseous and dusty environments according to the below:
Key to label image: |
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1. |
CE Conformity marking |
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2. |
EU marking (per 2014/34/EU) - Directive part |
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Description |
EU Marking |
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CE conformity marking |
CE |
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Explosion protection marking |
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Equipment group |
II |
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Equipment Category |
2G / 2D |
3. EU marking (per EN ISO 80078-36.2016 Standard part)
Description |
EU Marking |
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Protection principle |
h |
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Explosion protection marking |
Ex |
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Equipment group |
II / III |
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Equipment protection level (EPL) |
Gb / Db |
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6 | © Danfoss | June 2021 |
BC190086485285en-000301 |
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