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1、INTERNATIONAL STANDARD IS0 4399 Second edition 1995-05-01 Fluid power systems and components - Connectors and associated components - Nominal pressures Transmissions h ydrauliques et pneuma tiques - Raccords et 6Ements associks - Pressions nominales Reference number IS0 4399:1995(E) Copyright Intern
2、ational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword IS0 (the International Organization for Standardizatio
3、n) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be rep
4、resented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Stand
5、ards 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. International Standard IS0 4399 was prepared by Technical Committee ISO/TC 131, Fluid power system
6、s, Subcommittee SC 4, Connectors and similar products and components. This second edition cancels and replaces the first edition (IS0 4399:1977), which has been technically revised. 0 IS0 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized
7、in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii Copyright International Organizati
8、on for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 4399:1995(E) Introduction In fluid power systems, power is transmitted
9、and controlled through a fluid (liquid or gas) under pressure within a circuit. Systems and components are generally designed and marketed for use at a specific fluid pressure level. Components are connected through their ports and associated fluid con- ductor fitting ends. . . III Copyright Interna
10、tional Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 4399:1995(E) Fluid power system
11、s and components - Connectors and associated components - Nominal pressures 1 Scope This International Standard specifies a selection of nominal pressures for hydraulic and pneumatic fluid power connectors and associated components. NOTE 1 There may be a need to provide a selection of nominal pressu
12、res for connectors and associated com- ponents used in applications where the external pressure on the components is greater than the internal pressure, for example vacuum service. An International Standard that deals with this subject will be established in due course. 2 Normative references The fo
13、llowing standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are
14、 encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 2944:I 974, Fluid power systems and com- ponents - Nominal pressures. IS0 5598:1985, Fluid p
15、ower systems and com- ponents - Vocabulary. 3 Definitions For the purposes of this International Standard, the definitions given in IS0 5598 and the following defi- nition apply. 3.1 nominal pressure: A pressure value assigned to a component or a system for the purpose of con- venient designation. N
16、OTE 2 This definition is the same as that used in IS0 2944 and is intended solely to complete this Inter- national Standard. A more comprehensive definition for general purposes may be established subsequently. 4 Units 4.1 Nominal pressures shall be expressed in kilopascals (kPa) or megapascals (MPa
17、), depending on the pressure level, with the equivalent value in bars) in parentheses. 4.2 The nominal pressure shall be assumed to be gauge pressure, i.e. the pressure above atmospheric pressure, when no modifier is given. 4.3 Nominal pressures other than those specified here shall be selected from
18、 IS0 2944. 1) 1 bar = 100 kPa = 0.1 MPa 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4
19、399:1995(E) 0 IS0 5 Nominal pressures Nominal pressures for connectors and associated components shall be selected from table 1. 6 Identification statement (Reference to this International Standard) Table 1 - Nominal pressures (gauge) 0.25 MPa (2.5 bar) 0,63 MPa (6.3 bar) 1 MPa (IO bar) I,6 MPa (16
20、bar) 2.5 MPa (25 bar) 4 MPa (40 bar) 6,3 MPa (63 bar) 10 MPa (100 bar) 16 MPa (I 60 bar) 20 MPa (200 bar) 25 MPa (250 bar) 31,5 MPa (315 bar) 35 MPa (350 bar) 40 MPa (400 bar) 50 MPa (500 bar) 63 MPa (630 bar) NOTE - Non-preferred values are shown in square brackets. Use the following statement in t
21、est reports, cata- logues and sales literature when electing to comply with this International Standard: “Nominal pressures for connectors and associated components selected from IS0 4399:1995, Fluid power systems and com- ponents - Connectors and associated com- ponents - Nominal pressures. ” Copyr
22、ight International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4399:1995(E) KS 23.100.30 Descriptors: hydraulic
23、 fluid power, pneumatic fluid power, fluid circuits, pipe fittings, pipe joints, standard couplings, connectors, components. ratings, pressure. Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:52:32 MDTNo reproduction or networking permitted without license from IHS -,-,-
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