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1、BRITISH STANDARD BS ISO 7790:1997 Hydraulic fluid power Four-port modular stack valves and four-port directional control valves, sizes 02, 03 and 0,5 Clamping dimensions ICS 23.100.30 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 77
2、90:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1998 BSI 04-1999 ISBN 0 580 29249 5 National foreword This British Standard reproduces verbatim ISO 7790
3、:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/18, Fluid power systems and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European commi
4、ttee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-refer
5、ences The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catal
6、ogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comp
7、rises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside fro
8、nt cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7790:1997 BSI 04-1999i Contents Page National forewordInside front cover Forewordii Introduction1 1Scope1 2Normative re
9、ferences1 3Definitions1 4Symbols1 5Tolerances1 6Dimensions1 7Working pressure1 8Identification statement1 Annex A (informative) BibliographyInside back cover Figure 1 Clamping dimensions for four-port directional control valves and modular stack valves, sizes 02, 03 and 052 Table 1 Clamping dimensio
10、ns for four-port directional control valves and modular stack valves, sizes 02, 03 and 052 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled
11、Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7790:1997 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The w
12、ork 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-govern
13、mental, 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for vot
14、ing. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7790 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5, Control products and components. This second edition cancels a
15、nd replaces the first edition (ISO 7790:1986), of which it constitutes a technical revision. Annex A of this International Standard is for information only. Descriptors: Hydraulic fluid power, hydraulic transmission, valves, hydraulic valves, directional control valves, form specifications, dimensio
16、ns, mounting dimensions. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7790:1997 BSI 04-19991 Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circ
17、uit. Typical components found in such systems are hydraulic valves and hydraulic modular stack valves. These devices control flow direction, pressure or flow rate of liquids in the enclosed circuit. 1 Scope This International Standard specifies clamping dimensions of four-port modular stack valves a
18、nd four-port directional control valves, sizes 02, 03 and 05, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valv
19、es and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment. 2 Normative references The following standards contain provisions which, through reference of this text, constitute provisons of this International Standard. At the ti
20、me of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO main
21、tain registers of currently valid International Standards. ISO 4401:1994, Hydraulic fluid power Four-port directional control valves Mounting surfaces. ISO 5598:1985, Fluid power systems and components Vocabulary. ISO 5783:1995, Hydraulic fluid power Code for identification of valve mounting surface
22、s and cartridge valve cavities. 3 Definitions For the purpose of this International Standard, the definitions given in ISO 5598 apply. 4 Symbols For the purpose of this International Standard, the following letter symbols apply: a) H1 identifies clamping length for the fixing devices on directional
23、control valves; b) H2 identifies overall heights of modular stack valves. 5 Tolerances For tolerances and other data relating to the side of a modular stack valve on which another modular stack valve or a directional control valve is mounted, see ISO 4401. 6 Dimensions Clamping dimensions for modula
24、r stack valves and directional control valves, sizes 02, 03 and 05, in accordance with ISO 5783, with four service ports, are shown in Figure 1 and given in Table 1. The mounting surface shall be in accordance with ISO 4401. 7 Working pressure For an indication of the maximum limit of the working pr
25、essure, see note in Table 1. 8 Identification statement (Reference to this International Standard) Use the following statement in test reports, catalogues and sales literature when electing to comply with this International Standard: “Modular stack valves and directional control valves clamping dime
26、nsions conform to ISO 7790:1997, Hydraulic fluid power Four-port modular stack valves and four-port directional control valves, sizes 02, 03 and 05 Clamping dimensions.” Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7790:1997 2 BSI
27、04-1999 Table 1 Clamping dimensions for four-port directional control valves and modular stack valves, sizes 02, 03 and 05 (mounting surface in accordance with ISO 4401) 1) Dimension H1 is understood to be the mounting height (clamping length for fixing bolts) where fixing bolts with head are used.
28、Where studs are used, consult sales literature on valve heights before determining the length of these studs. 2) Dimension H2 is understood to be the overall mounting height of a modular stack valve, including O-ring plate height, if necessary. Figure 1 Clamping dimensions for four-port directional
29、control valves and modular stack valves, sizes 02, 03 and 05 (mounting surface in accordance with ISO 4401) Dimensions in millimetres Valve typeDimensionSize 02Size 03Size 05 Directional control valveH1 3222or 42 30 or 50 Modular stack valveH2a 30 4050 NOTEThe supplier shall establish the maximum wo
30、rking pressure for valves, subplates and the manifold blocks. a When dimension H2 is not acceptable for design reasons, it shall be increased or decreased in increments of 10 mm. 0 2 0 2 0 2 0 2 0 2 0 0,5 0 0,3 0 0,3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Unc
31、ontrolled Copy, (c) BSI BS ISO 7790:1997 BSI 04-1999 Annex A (informative) Bibliography 1 ISO 129:1985, Technical drawings Dimensioning General principles, definitions, methods of execution and special indications. 2 ISO 286-1:1988, ISO system of limits and fits Part 1: Bases of tolerances, deviatio
32、ns and fits. 3 ISO 468:1982, Surface roughness Parameters, their values and general rules for specifying requirements. 4 ISO 965-1:1), ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data. 5 ISO 1101:2), Geometrical product specification (GPS) Geometrical tolerancing
33、 Generalities, definitions, symbols, indications on drawings. 6 ISO 1302:1992, Technical drawings Method of indicating surface texture. 1) To be published. (Revision of ISO 965-1:1980) 2) To be published. (Revision of ISO 1101:1983) Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT
34、+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7790:1997 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is i
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42、his does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:47:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI