ISO 6743-3:2003

Lubricants, industrial oils and related products (class L) - Classification - Part 3: Family D (Compressors)

ISO 6743-3:2003 establishes the detailed classification of lubricants for use in family D, air compressors, gas compressors and refrigeration compressors. The intention of ISO 6743-3:2003 is to provide a rationalized range of the most commonly used internationally available lubricants for air, gas and refrigeration compressors, without resorting to unnecessary restriction by specifications or products description. The primary intention of this classification is to describe and promote the use of the type of lubricant which is best suited for the particular application, specifically with stationary air compressors, with the aim of reducing as far as possible the risks of fire and explosion. Relevant safety rules are given in ISO 5388. ISO 6743-3:2003 should be read in conjunction with ISO 6743-99.

Lubrifiants, huiles industrielles et produits connexes (classe L) — Classification — Partie 3: Famille D (Compresseurs)

L'ISO 6743-3:2003 établit la classification détaillée des lubrifiants de la famille D, pour les compresseurs d'air ainsi que les compresseurs à gaz et frigorifiques. L'objet de l'ISO 6743-3:2003 est de fournir une gamme rationnelle des lubrifiants pour compresseurs à air, à gaz et frigorifiques les plus couramment utilisés et disponibles sur le plan international, sans devoir recourir à une limitation inutile par des spécifications ou une définition des produits. L'intention première de cette classification a été de décrire et favoriser l'emploi du type de lubrifiant le mieux adapté à l'application à laquelle il est destiné, en particulier dans les compresseurs d'air fixes, tout en réduisant autant que possible les risques de feu et d'explosion. Les règles de sécurité adéquates sont présentées dans l'ISO 5388. Il convient de lire l'ISO 6743-3:2003 conjointement avec l'ISO 6743-99.

Maziva, industrijska olja in sorodni proizvodi (skupina L) – Klasifikacija – 3. del: Podskupina D (kompresorji)

General Information

• Status: Published
• Publication Date: 15-Oct-2003
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: ISO/TC 28/SC 4 - Classifications and specifications
• Drafting Committee: ISO/TC 28/SC 4 - Classifications and specifications
• Current Stage: 9093 - International Standard confirmed
• Start Date: 25-Jun-2025
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 6743-3:2006 - Lubricants, industrial oils and related products (class L) -- Classification -- Part 3: Family D (Compressors)

Relations

• Revised: SIST ISO 6743-3B:2002 - Lubricants, industrial oils and related products (class L) -- Classification -- Part 3B: Family D (Gas and refrigeration compressors)
• Effective Date: 12-May-2008
• Revised: SIST ISO 6743-3A:2002 - Lubricants, industrial oils and related products (class L) -- Classification -- Part 3A: Family D (Compressors)
• Effective Date: 12-May-2008
• Revises: ISO 6743-3A:1987 - Lubricants, industrial oils and related products (class L) - Classification - Part 3A: Family D (Compressors)
• Effective Date: 15-Apr-2008
• Revises: ISO 6743-3B:1988 - Lubricants, industrial oils and related products (class L) - Classification - Part 3B: Family D (Gas and refrigeration compressors)
• Effective Date: 15-Apr-2008

Overview

ISO 6743-3:2003 - Lubricants, industrial oils and related products (class L) - Part 3: Family D (Compressors) defines a detailed, practical classification system for lubricants used in air compressors, gas compressors and refrigeration compressors. The standard provides a rationalized range of internationally available compressor lubricants (mineral, semi‑synthetic and fully synthetic) and coding conventions (e.g., ISO‑L‑DAB 68 or L‑DAB 68) to promote correct lubricant selection and reduce risks such as fire and explosion in stationary compressor applications.

Key topics and technical requirements

• Classification system: Family D is broken into category codes (e.g., DAA, DAB, DAG, DAH, DAJ, DVA–DVF, DGA–DGE, DRA–DRG) that identify lubricant types by application (reciprocating, rotary, oil‑flooded, vacuum, process gas, refrigeration).
• Viscosity grading: Lubricants are supplemented by ISO viscosity grades per ISO 3448 (e.g., “68” in ISO‑L‑DAB 68).
• Lubricant chemistries: Covers highly refined mineral oils, semi‑synthetic, and synthetic fluids (polyalkylene glycols, polyolesters, polyalphaolefins, polyvinylethers) and classifies miscible vs. immiscible behaviour with refrigerants.
• Duty definitions: Differentiates normal and severe duty (Annex A), with practical criteria - e.g., discharge temperatures (100 °C, 165 °C), differential pressures (2.5 MPa) and discharge pressures (7.0 MPa) - to guide lubricant selection and drain cycles.
• Process gas compatibility: Specific categories address gas chemistry and reactivity (inert, reducing, reactive gases) and warn against mixing incompatible formulations without supplier consultation.
• Vacuum and refrigeration guidance: Includes vacuum lubricant groupings (low to high vacuum) and refrigeration lubricant families matched to refrigerant types (NH3, HFC, CFC/HCFC, CO2, hydrocarbons).
• Safety focus: Primary aim is to reduce fire/explosion risk in stationary compressors; references safety rules in ISO 5388.

Applications and users

Who uses ISO 6743-3:2003:

• Compressor manufacturers and system designers specifying compatible lubricants
• Lubricant producers formatting product classifications and data sheets
• Maintenance engineers and plant operators responsible for oil selection, drain cycles and reliability
• Procurement and standards/specification writers ensuring proper lubricant coding and refrigerant compatibility
• Safety and reliability engineers managing risk in compressed‑gas systems

Practical uses:

• Selecting the correct lubricant code for reciprocating, rotary or oil‑flooded compressors
• Matching lubricants to refrigerants and process gases
• Defining drain intervals and duty classification (normal vs severe)

Related standards

• ISO 3448 - Viscosity classification of industrial lubricants
• ISO 5388 - Stationary air compressors - Safety rules
• ISO 8681 - Definition of lubricant classification classes
• ISO 6743-99 - General rules for class L (classification)

Keywords: ISO 6743-3:2003, compressor lubricants, lubricant classification, air compressors, refrigeration lubricants, process gas compressors, ISO 3448.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2006
Maziva, industrijska olja in sorodni proizvodi (skupina L) – Klasifikacija – 3. del:
Podskupina D (kompresorji)
Lubricants, industrial oils and related products (class L) -- Classification -- Part 3: Family
D (Compressors)
Lubrifiants, huiles industrielles et produits connexes (classe L) -- Classification -- Partie
3: Famille D (Compresseurs)
Ta slovenski standard je istoveten z: ISO 6743-3:2003
ICS:
75.100 Maziva Lubricants, industrial oils and
related products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6743-3
First edition
2003-10-15
Lubricants, industrial oils and related
products (class L) — Classification —
Part 3:
Family D (Compressors)
Lubrifiants, huiles industrielles et produits connexes (classe L) —
Classification —
Partie 3: Famille D (Compresseurs)

Reference number
©
ISO 2003
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2003
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2003 — All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6743-3 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants,
Subcommittee SC 4, Classifications and specifications.
This first edition combines, cancels and replaces the first editions of ISO 6743-3A:1987 and
ISO 6743-3B:1988, which have been technically revised.
ISO 6743 consists of the following parts, under the general title Lubricants, industrial oils and related products
(class L) — Classification:
 Part 1: Family A (Total loss systems)
 Part 2: Family F (Spindle bearings, bearings and associated clutches)
 Part 3: Family D (Compressors)
 Part 4: Family H (Hydraulic systems)
 Part 5: Family T (Turbines)
 Part 6: Family C (Gears)
 Part 7: Family M (Metalworking)
 Part 8: Family R (Temporary protection against corrosion)
 Part 9: Family X (Greases)
 Part 10: Family Y (Miscellaneous)
 Part 11: Family P (Pneumatic tools)
 Part 12: Family Q (Heat transfer fluids)
 Part 13: Family G (Slideways)
 Part 14: Family U (Heat treatment)
 Part 15: Family E (Internal combustion engine oils)
 Part 99: General
iv © ISO 2003 — All rights reserved

INTERNATIONAL STANDARD ISO 6743-3:2003(E)

Lubricants, industrial oils and related products (class L) —
Classification —
Part 3:
Family D (Compressors)
1 Scope
This part of ISO 6743 establishes the detailed classification of lubricants for use in family D, air compressors,
gas compressors and refrigeration compressors.
The intention of this part of ISO 6743 is to provide a rationalized range of the most commonly used
internationally available lubricants for air, gas and refrigeration compressors, without resorting to unnecessary
restriction by specifications or products description.
The primary intention of this classification is to describe and promote the use of the type of lubricant which is
best suited for the particular application, specifically with stationary air compressors, with the aim of reducing
as far as possible the risks of fire and explosion. Relevant safety rules are given in ISO 5388.
ISO 5388 as published in 1991 should be revised to reflect the change from light, medium and heavy duty
cycles to normal and severe duty cycles as described in this edition of ISO 6743-3.
1)
This part of ISO 6743 should be read in conjunction with ISO 6743-99 .
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3448:1992, Industrial liquid lubricants — ISO viscosity classification
ISO 5388, Stationary air compressors — Safety rules and code of practice
ISO 8681:1986, Petroleum products and lubricants — Method of classification — Definition of classes

1) ISO 6743-99:2002, Lubricants, industrial oils and related products (class L) — Classification — Part 99: General
3 Explanation of systems used
3.1 The detailed classification of family D has been established by defining the categories of products
required for the main applications of this family.
3.2 Each category is designated by a symbol consisting of a group of letters, which together constitute a
code.
NOTE The first letter of the code “D” identifies the family of the product considered but the second and third letters
taken separately have no significance of their own.
The designation of each category may be supplemented by the addition of viscosity grades according to
ISO 3448.
3.3 In this classification system, products are designated in a uniform manner in accordance with ISO 8681.
For example, a particular product may be designated in a complete form, e.g., ISO-L-DAB 68, or in an
abbreviated form, e.g., L-DAB 68, the number indicating the viscosity grade according to ISO 3448.
Table 1 — Classification of lubricants for air compressors
Product type
Code General Particular More specific and/or Symbol Typical
Remarks
letter application application application performance ISO-L applications
requirements
D Air Positive Reciprocating Normally highly DAA Normal duty See Annex A
compressors displacement crosshead and refined mineral oils,
air trunk pistons may be semi-
compressors or synthetic or full
with oil- Rotary drip feed synthetic fluids
lubricated (vane)
Normally specially DAB Severe duty
compression
formulated semi-
chambers
synthetic or fully
synthetic fluids,
may be specially
formulated highly
refined mineral oils
Rotary oil-flooded Mineral oils, may DAG Lubricant drain
(vane and screw be highly refined cycles of
compressors) mineral oils u 2 000 h
Normally specially DAH Lubricant drain
formulated highly cycles of
refined mineral oils
> 2 000 h and
or semi-synthetic
u 4 000 h
fluids
Normally specially DAJ Lubricant drain
formulated semi- cycles of
synthetic or fully
> 4 000 h
synthetic fluids
Positive Liquid-ring  Lubricants
displacement compressors and suitable for
air water-flooded gears,
compressors vane and screw bearings and
with oil-free compressors transmissions
compression
Reciprocating oil-
chambers
free compressors
Rotary oil-free
compressors
2 © ISO 2003 — All rights reserved

Table 1 (continued)
Product type
Code General Particular More specific and/or Symbol Typical
Remarks
letter application application application performance ISO-L applications
requirements
Dynamic Radial and axial  Lubricants
compressors turbo- suitable for
compressors bearings and
gears
Vacuum Positive Reciprocating and DVA Low vacuum Low vacuum
pumps displacement rotary drip feed for non-
is 10 to
vacuum pumps aggressive −1 3
10 kPa (10
Rotary oil-flooded
with oil
...

INTERNATIONAL ISO
STANDARD 6743-3
First edition
2003-10-15
Lubricants, industrial oils and related
products (class L) — Classification —
Part 3:
Family D (Compressors)
Lubrifiants, huiles industrielles et produits connexes (classe L) —
Classification —
Partie 3: Famille D (Compresseurs)

Reference number
©
ISO 2003
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2003
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2003 — All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6743-3 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants,
Subcommittee SC 4, Classifications and specifications.
This first edition combines, cancels and replaces the first editions of ISO 6743-3A:1987 and
ISO 6743-3B:1988, which have been technically revised.
ISO 6743 consists of the following parts, under the general title Lubricants, industrial oils and related products
(class L) — Classification:
 Part 1: Family A (Total loss systems)
 Part 2: Family F (Spindle bearings, bearings and associated clutches)
 Part 3: Family D (Compressors)
 Part 4: Family H (Hydraulic systems)
 Part 5: Family T (Turbines)
 Part 6: Family C (Gears)
 Part 7: Family M (Metalworking)
 Part 8: Family R (Temporary protection against corrosion)
 Part 9: Family X (Greases)
 Part 10: Family Y (Miscellaneous)
 Part 11: Family P (Pneumatic tools)
 Part 12: Family Q (Heat transfer fluids)
 Part 13: Family G (Slideways)
 Part 14: Family U (Heat treatment)
 Part 15: Family E (Internal combustion engine oils)
 Part 99: General
iv © ISO 2003 — All rights reserved

INTERNATIONAL STANDARD ISO 6743-3:2003(E)

Lubricants, industrial oils and related products (class L) —
Classification —
Part 3:
Family D (Compressors)
1 Scope
This part of ISO 6743 establishes the detailed classification of lubricants for use in family D, air compressors,
gas compressors and refrigeration compressors.
The intention of this part of ISO 6743 is to provide a rationalized range of the most commonly used
internationally available lubricants for air, gas and refrigeration compressors, without resorting to unnecessary
restriction by specifications or products description.
The primary intention of this classification is to describe and promote the use of the type of lubricant which is
best suited for the particular application, specifically with stationary air compressors, with the aim of reducing
as far as possible the risks of fire and explosion. Relevant safety rules are given in ISO 5388.
ISO 5388 as published in 1991 should be revised to reflect the change from light, medium and heavy duty
cycles to normal and severe duty cycles as described in this edition of ISO 6743-3.
1)
This part of ISO 6743 should be read in conjunction with ISO 6743-99 .
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3448:1992, Industrial liquid lubricants — ISO viscosity classification
ISO 5388, Stationary air compressors — Safety rules and code of practice
ISO 8681:1986, Petroleum products and lubricants — Method of classification — Definition of classes

1) ISO 6743-99:2002, Lubricants, industrial oils and related products (class L) — Classification — Part 99: General
3 Explanation of systems used
3.1 The detailed classification of family D has been established by defining the categories of products
required for the main applications of this family.
3.2 Each category is designated by a symbol consisting of a group of letters, which together constitute a
code.
NOTE The first letter of the code “D” identifies the family of the product considered but the second and third letters
taken separately have no significance of their own.
The designation of each category may be supplemented by the addition of viscosity grades according to
ISO 3448.
3.3 In this classification system, products are designated in a uniform manner in accordance with ISO 8681.
For example, a particular product may be designated in a complete form, e.g., ISO-L-DAB 68, or in an
abbreviated form, e.g., L-DAB 68, the number indicating the viscosity grade according to ISO 3448.
Table 1 — Classification of lubricants for air compressors
Product type
Code General Particular More specific and/or Symbol Typical
Remarks
letter application application application performance ISO-L applications
requirements
D Air Positive Reciprocating Normally highly DAA Normal duty See Annex A
compressors displacement crosshead and refined mineral oils,
air trunk pistons may be semi-
compressors or synthetic or full
with oil- Rotary drip feed synthetic fluids
lubricated (vane)
Normally specially DAB Severe duty
compression
formulated semi-
chambers
synthetic or fully
synthetic fluids,
may be specially
formulated highly
refined mineral oils
Rotary oil-flooded Mineral oils, may DAG Lubricant drain
(vane and screw be highly refined cycles of
compressors) mineral oils u 2 000 h
Normally specially DAH Lubricant drain
formulated highly cycles of
refined mineral oils
> 2 000 h and
or semi-synthetic
u 4 000 h
fluids
Normally specially DAJ Lubricant drain
formulated semi- cycles of
synthetic or fully
> 4 000 h
synthetic fluids
Positive Liquid-ring  Lubricants
displacement compressors and suitable for
air water-flooded gears,
compressors vane and screw bearings and
with oil-free compressors transmissions
compression
Reciprocating oil-
chambers
free compressors
Rotary oil-free
compressors
2 © ISO 2003 — All rights reserved

Table 1 (continued)
Product type
Code General Particular More specific and/or Symbol Typical
Remarks
letter application application application performance ISO-L applications
requirements
Dynamic Radial and axial  Lubricants
compressors turbo- suitable for
compressors bearings and
gears
Vacuum Positive Reciprocating and DVA Low vacuum Low vacuum
pumps displacement rotary drip feed for non-
is 10 to
vacuum pumps aggressive −1 3
10 kPa (10
Rotary oil-flooded
with oil- gas
to 1 mbar)
(vane and screw)
lubricated
DVB Low vacuum
compression
for aggressive
chambers
gas
Oil-sealed vacuum DVC Medium Medium
pumps (sliding vacuum for vacuum is
−1
vane, rotary and non-
10 to
−4
rotary plunger) aggressive
10 kPa (1 to
gas
−3
10 mbar)
DVD Medium
vacuum for
aggressive
gas
DVE High vacuum High vacuum
−4
for non-
is 10 to
aggressive −8
10 kPa
gas
−3
(10 to
−7
10 mbar)
DVF High vacuum
for aggressive
gas
...

NORME ISO
INTERNATIONALE 6743-3
Première édition
2003-10-15
Lubrifiants, huiles industrielles et
produits connexes (classe L) —
Classification —
Partie 3:
Famille D (Compresseurs)
Lubricants, industrial oils and related products (class L) —
Classification —
Part 3: Family D (Compressors)

Numéro de référence
©
ISO 2003
PDF – Exonération de responsabilité
Le présent fichier PDF peut contenir des polices de caractères intégrées. Conformément aux conditions de licence d'Adobe, ce fichier
peut être imprimé ou visualisé, mais ne doit pas être modifié à moins que l'ordinateur employé à cet effet ne bénéficie d'une licence
autorisant l'utilisation de ces polices et que celles-ci y soient installées. Lors du téléchargement de ce fichier, les parties concernées
acceptent de fait la responsabilité de ne pas enfreindre les conditions de licence d'Adobe. Le Secrétariat central de l'ISO décline toute
responsabilité en la matière.
Adobe est une marque déposée d'Adobe Systems Incorporated.
Les détails relatifs aux produits logiciels utilisés pour la création du présent fichier PDF sont disponibles dans la rubrique General Info
du fichier; les paramètres de création PDF ont été optimisés pour l'impression. Toutes les mesures ont été prises pour garantir
l'exploitation de ce fichier par les comités membres de l'ISO. Dans le cas peu probable où surviendrait un problème d'utilisation,
veuillez en informer le Secrétariat central à l'adresse donnée ci-dessous.

©  ISO 2003
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous
quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit
de l'ISO à l'adresse ci-après ou du comité membre de l'ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax. + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Publié en Suisse
ii © ISO 2003 — Tous droits réservés

Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée
aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 6743-3 a été élaborée par le comité technique ISO/TC 28, Produits pétroliers et lubrifiants, sous-comité
SC 4, Classifications et spécifications.
Cette première édition combine, annule et remplace la première édition de l'ISO 6743-3A:1987, et de
l'ISO 6743-3B:1988, qui ont fait l'objet d'une révision technique.
L'ISO 6743 comprend les parties suivantes, présentées sous le titre général Lubrifiants, huiles industrielles et
produits connexes (classe L) — Classification:
 Partie 1: Famille A (Graissage perdu)
 Partie 2: Famille F (Paliers de broche, paliers et embrayages associés)
 Partie 3: Famille D (Compresseurs)
 Partie 4: Famille H (Systèmes hydrauliques)
 Partie 5: Famille T (Turbines)
 Partie 6: Famille C (Engrenages)
 Partie 7: Famille M (Travail des métaux)
 Partie 8: Famille R (Protection temporaire contre la corrosion)
 Partie 9: Famille X (Graisses)
 Partie 10: Famille Y (Autres applications)
 Partie 11: Famille P (Outils pneumatiques)
 Partie 12: Famille Q (Fluides de transfert de chaleur)
 Partie 13 : Famille G (Glissières)
 Partie 14 : Famille U (Traitement thermique)
 Partie 15: Famille E (Huiles pour moteurs à combustion interne)
 Partie 99: Généralités
iv © ISO 2003 — Tous droits réservés

NORME INTERNATIONALE ISO 6743-3:2003(F)

Lubrifiants, huiles industrielles et produits connexes
(classe L) — Classification —
Partie 3:
Famille D (Compresseurs)
1 Domaine d'application
La présente partie de l’ISO 6743 établit la classification détaillée des lubrifiants de la famille D, pour les
compresseurs d'air ainsi que les compresseurs à gaz et frigorifiques.
L'objet de la présente partie de l'ISO 6743 est de fournir une gamme rationnelle des lubrifiants pour
compresseurs à air, à gaz et frigorifiques les plus couramment utilisés et disponibles sur le plan international,
sans devoir recourir à une limitation inutile par des spécifications ou une définition des produits.
L'intention première de cette classification est de décrire et favoriser l'emploi du type de lubrifiant le mieux
adapté à l'application à laquelle il est destiné, en particulier dans les compresseurs d'air fixes, tout en
réduisant autant que possible les risques de feu et d'explosion. Les règles de sécurité adéquates sont
présentées dans l'ISO 5388.
Il conviendrait que la norme ISO 5388 telle que publiée en 1991 soit révisée pour refléter le changement de
normal, moyen ou élevé à normal ou sévère pour ce qui concerne les cycles de service tels que décrits dans
cette édition de l'ISO 6743-3.
1)
Il convient de lire la présente partie de l'ISO 6743 conjointement avec l'ISO 6743-99 .
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent document. Pour les
références datées, seule l'édition citée s'applique. Pour les références non datées, la dernière édition du
document de référence s'applique (y compris les éventuels amendements).
ISO 3448:1992, Lubrifiants liquides industriels — Classification ISO selon la viscosité
ISO 5388, Compresseurs d'air fixes — Règles de sécurité et code d'exploitation
ISO 8681:1986, Produits pétroliers et lubrifiants — Système de classification — Définition des classes de
produits
1) ISO 6743-99:2002, Lubrifiants, huiles industrielles et produits connexes (classe L) — Classification — Partie 99:
Généralités
3 Explication des symboles utilisés
3.1 Le principe de la classification détaillée de la famille D repose sur la définition des catégories de
produits requises pour les principales applications de cette famille.
3.2 Chaque catégorie est désignée par un symbole constitué d'un groupe de lettres dont l'ensemble forme
un code.
NOTE La première lettre du code «D» identifie la famille du produit considéré, mais la seconde et la troisième lettre
prises isolément, ne sont affectées d'aucune signification propre.
La désignation de chaque catégorie peut être complétée par l'addition de classes de viscosité, en conformité
avec l'ISO 3448.
3.3 Dans le présent système de classification, la désignation des produits est effectuée de façon uniforme
selon l'ISO 8681. Par exemple, un produit particulier peut être désigné sous sa forme complète, par exemple:
ISO-L-DAB 68, ou sous sa forme abrégée, L-DAB 68, le numéro indiquant la classe de viscosité,
conformément à l'ISO 3448.
Tableau 1 — Classification des lubrifiants pour compresseurs d'air
Application Type de produit et/ou
Lettre Application Application Code Exemples
plus exigences de Remarques
code générale particulière ISO-L d'application
spécifique performance
D Compresseurs Compresseurs Alternatifs (à Généralement huiles DAA Service Voir Annexe A
d'air d'air crosse et minérales hautement normal
volumétriques piston) raffinées, ou
avec ou éventuellement des
chambres de Rotatifs à fluides semi-
compression graissage synthétiques ou
lubrifiées goutte à goutte synthétiques
(à palette)
Généralement des DAB Service
fluides semi- sévère
synthétiques ou
synthétiques
spécialement formulées,
ou éventuellement des
huiles minérales
hautement raffinées,
spécialement formulées
Rotatifs à Huiles minérales, DAG Cycles de
injection éventuellement vidange du
d'huile hautement raffinées lubrifiant
(compresseurs
u 2 000 h
à palette et à
Généralement des huiles DAH Cycles de
vis)
minérales hautement vidange du
raffinées ou des fluides lubrifiant
semi-synthétiques,
> 2 000 h et
spécialement formulés
u 4 000 h
Généralement des DAJ Cycles de
fluides synthétiques ou vidange du
semi-synthétiques, lubrifiant
spécialement formulés
> 4 000 h
2 © ISO 2003 — Tous droits réservés

Tableau 1 (suite)
Application Type de produit et/ou
Lettre Application Application Code Exemples
plus exigences de Remarques
code générale particulière ISO-L d'application
spécifique performance
Compresseurs Compresseurs  Lubrifiants
d'air à anneaux utilisés pour
volumétriques liquides et engrenages,
avec compresseurs roulements et
chambres de à palette et à mécanismes de
compression vis à injection transmission
non lubrifiées d'eau
Compresseurs
alternatifs sans
huile
Compresseurs
rotatifs sans
huile
Compresseurs Turbocom-  Lubrifiants
dynamiques presseurs utilisés pour
centrifuges et roulements et
axiaux engrenages
Pompes à Pompes à vide Alternatifs, DVA Vide faible Un vide faible
vide volumétriques rotatifs lubrifiés pour gaz non correspond à une
avec goutte à goutte agressifs pression
chambres de comprise entre
Rotatifs à
DVB Vide faible
2 −1
compression
10 et 10 kPa
injection
pour gaz
lubrifiées 3
(10 à 1 mbar)
d'huile (à
agressifs
palette et à
vis)
Pompes à vide DVC Vide moyen Un vide moyen
à joint pour gaz non correspond à une
hydraulique agressifs pression
(palette comprise entre
DVD Vide moyen
−1 −4
tournante,
10 et 10 kPa
pour gaz
rotatif, et à −3
(1 à 10 mbar)
agressifs
piston rotatif)
DVE Vide élevé Un vide élevé
pour gaz non correspond à une
agressifs pression
comprise entre
DVF Vide élevé
−4 −8
10 et 10 kPa
pour gaz
−3
(10 à
agressifs
−7
10 mbar)
Tableau 2 — Classification des lubrifiants pour compresseurs de gaz de procédé
Application Type de produit
Lettre Application Application Code Exemples
plus et/ou exige
...