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SLOVENSKI STANDARD
01-januar-2023
Nadomešča:
SIST EN ISO 7494-2:2015
Zobozdravstvo - Stacionarne dentalne enote in stoli za paciente - 2. del: Sistemi za
dovod zraka in vode, za sukcijo (aspiracijo) in odvod odpadne vode (ISO 7494-
2:2022)
Dentistry - Stationary dental units and dental patient chairs - Part 2: Air, water, suction
and wastewater systems (ISO 7494-2:2022)
Zahnheilkunde - Fest installierte dentale Behandlungseinheiten - Teil 2: Luft-, Wasser-,
Absaug- und Abwassersysteme (ISO 7494-2:2022)
Médecine bucco-dentaire - Units dentaires fixes et fauteuils dentaires patient - Partie 2:
Systèmes d'alimentation en air et en eau, d'aspiration et d'évacuation des eaux usées
(ISO 7494-2:2022)
Ta slovenski standard je istoveten z: EN ISO 7494-2:2022
ICS:
11.060.20 Zobotehnična oprema Dental equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 7494-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 11.060.20 Supersedes EN ISO 7494-2:2015
English Version
Dentistry - Stationary dental units and dental patient
chairs - Part 2: Air, water, suction and wastewater systems
(ISO 7494-2:2022)
Médecine bucco-dentaire - Units dentaires fixes et Zahnheilkunde - Fest installierte dentale
fauteuils dentaires patient - Partie 2: Systèmes Behandlungseinheiten - Teil 2: Luft-, Wasser-, Absaug-
d'alimentation en air et en eau, d'aspiration et und Abwassersysteme (ISO 7494-2:2022)
d'évacuation des eaux usées (ISO 7494-2:2022)
This European Standard was approved by CEN on 4 June 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7494-2:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 7494-2:2022) has been prepared by Technical Committee ISO/TC 106
"Dentistry" in collaboration with Technical Committee CEN/TC 55 “Dentistry” the secretariat of which
is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 7494-2:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 7494-2:2022 has been approved by CEN as EN ISO 7494-2:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 7494-2
Third edition
2022-07
Dentistry — Stationary dental units
and dental patient chairs —
Part 2:
Air, water, suction and wastewater
systems
Médecine bucco-dentaire — Units dentaires fixes et fauteuils
dentaires patient —
Partie 2: Systèmes d'alimentation en air et en eau, d'aspiration et
d'évacuation des eaux usées
Reference number
ISO 7494-2:2022(E)
ISO 7494-2:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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or ISO’s member body in the country of the requester.
ISO copyright office
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Email: [email protected]
Website: www.iso.org
Published in Switzerland
ii
ISO 7494-2:2022(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 4
4.1 Classification of suction systems . 4
4.2 Classification of suction air flow rate . 4
5 Requirements . 4
5.1 Connections from the stationary dental unit to dental handpieces . 4
5.1.1 General . 4
5.1.2 Powered scaler . 4
5.1.3 Multifunction handpiece . 5
5.1.4 Handpiece and motor . 5
5.1.5 Powder jet handpiece . 5
5.1.6 Simultaneous use of more than one dental handpiece . 6
5.2 Supply connections to the stationary dental unit . 6
5.3 Water and wastewater systems . 8
5.3.1 General . 8
5.3.2 Incoming water . 8
5.3.3 Materials used for construction of procedural water systems within the
stationary dental unit . 8
5.3.4 Backflow prevention device for stationary dental units connected to the
external drinking water supply . 9
5.3.5 Cuspidors . . 9
5.3.6 Water venturi . 9
5.3.7 Particle filter . 9
5.3.8 Bacterial filter . 9
5.3.9 Bottled water system supplying procedural water or solution . 9
5.3.10 Retraction . 9
5.3.11 Treatment method for biofilm . 10
5.3.12 Water sampling connection point . 10
5.3.13 Wastewater drain connection . 11
5.4 Air system . 11
5.4.1 General . 11
5.4.2 Incoming dental air . 11
5.4.3 Particle filters . 11
5.4.4 Bacterial filters . 11
5.5 Stationary dental unit suction systems .12
5.5.1 General .12
5.5.2 Maximum suction pressure .12
5.5.3 Suction pressure head loss .12
5.5.4 Configuration of cannula connectors and cannula .12
5.5.5 Operating hoses with cannula connectors . 14
5.5.6 Solids filter . 14
5.5.7 Air separator . 14
5.5.8 Stationary dental unit suction source connection point . 14
5.6 Test report .
...