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1、 Reference number ISO 7789:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 7789 Second edition 2007-10-01 Hydraulic fluid power Two-, three- and four-port screw-in cartridge valves Cavities Transmissions hydrauliques Distributeurs cartouche visser deux, trois et quatre orifices Logements Copyright Inter
2、national Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) PDF disclaimer This PDF file may contai
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5、eters 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. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rig
6、hts 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 ISOs member body in the country of th
7、e 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reserved Copyright International Organization for Standardization Provided by IHS under license wit
8、h ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3
9、Terms, definitions and symbols 2 4 Dimensions 2 5 Tolerances. 2 6 Ports usage and identification 3 7 Identification statement (Reference to this International Standard) 3 Bibliography. 24 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Emp
10、loyees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national
11、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
12、 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 g
13、iven 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 leas
14、t 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 7789 was prepared by Technical Committee ISO/TC 131,
15、Fluid power systems, Subcommittee SC 5, Control products and components. This second edition cancels and replaces the first edition (ISO 7789:1998), which has been technically revised. It also incorporates the Technical Corrigendum ISO 7789:1998/Cor.1:1999. Copyright International Organization for S
16、tandardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) ISO 2007 All rights reserved v Introduction In hydraulic fluid pow
17、er systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Typical components found in such systems include hydraulic valves. These devices control flow direction, pressure or flow rate liquids in the enclosed circuit. Copyright International Organiza
18、tion for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS
19、under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 7789:2007(E) ISO 2007 All rights reserved 1 Hydraulic fluid power Two-, three- and four
20、-port screw-in cartridge valves Cavities 1 Scope This International Standard specifies the dimensions and provides other data relating to cavities in which two-, three- and four-port, screw-in cartridge valves are mounted in order to ensure interchangeability. It is applicable to two-, three- and fo
21、ur-port screw-in cartridge valves generally used in industrial and mobile equipment. 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 t
22、he referenced document (including any amendments) applies. ISO 1101:2004, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out ISO 1219-1:2006, Fluid power systems and components Graphic symbols and circuit diagrams Part 1: Graphic sy
23、mbols for conventional use and data-processing applications ISO 1302:2002, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation ISO 2768-1:1989, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance i
24、ndications ISO 2768-2:1989, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications ISO 5598:1), Fluid power systems and components Vocabulary ISO 5783:1995, Hydraulic fluid power Code for identification of valve mounting surfaces and cartridge valve c
25、avities ISO 6149-1:2006, Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 1: Ports with truncated housing for O-ring seal ISO 16874:2004, Hydraulic fluid power Identification of manifold assemblies and their components 1) T
26、o be published. (Revision of ISO 5598:1985) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-
27、,- ISO 7789:2007(E) 2 ISO 2007 All rights reserved 3 Terms, definitions and symbols For the purposes of this document, the terms and definitions given in ISO 5598 and the graphical symbols given in ISO 1219-1 apply. 4 Dimensions 4.1 The dimensions of cavities for hydraulic screw-in cartridge valves
28、with two-, three- and four-ports shall be selected from the figures and tables specified in 4.2 to 4.10. 4.2 The dimensions of cavities for two-port valves (excluding pressure-relief valves) with 5 mm to 20,5 mm maximum port diameter are shown in Figure 1 and given in Table 1. 4.3 The dimensions of
29、cavities for two-port pressure-relief valves with 5 mm to 20,5 mm maximum port diameter and with a flow direction from port 1 to port 2, are shown in Figure 2 and given in Table 3. 4.4 The dimensions of cavities for two-port pressure-relief valves with 6 mm to 20,5 mm maximum port diameter and with
30、a flow direction from port 2 to port 1, are shown in Figure 3 and given in Table 5. 4.5 The dimensions of cavities for three-port valves with 6 mm to 20,5 mm maximum port diameter are shown in Figure 4 and given in Table 7. 4.6 The dimensions of cavities for four-port valves with 6 mm to 20,5 mm max
31、imum port diameter are shown in Figure 5 and given in Table 9. 4.7 The dimensions of cavities for two-port valves (excluding pressure-relief valves) with 10,5 mm to 20,5 mm maximum main port diameter and one pilot port are shown in Figure 6 and given in Table 11. 4.8 The dimensions of cavities for t
32、wo-port pressure-relief valves with 10,5 mm to 20,5 mm maximum main port diameter, one vent or pilot port and with a flow direction from port 1 to port 2 are shown in Figure 7 and given in Table 13. 4.9 The dimensions of cavities for two-port pressure-relief valves with 10,5 mm to 20,5 mm maximum ma
33、in port diameter, one vent or pilot port and with a flow direction from port 2 to port 1 are shown in Figure 8 and given in Table 15. 4.10 The dimensions of cavities for three-port valves with 10,5 mm to 20,5 mm maximum main port diameter and one pilot port are shown in Figure 9 and given in Table 1
34、7. 5 Tolerances Tolerances values for all dimensions and surface roughness are given in Figures 1 to 9 and in Tables 1, 3, 5, 7, 9, 11, 13, 15 and 17, in accordance with ISO 1101 and ISO 1302. Tolerances for linear and angular dimensions shall be in accordance with the designation as described in IS
35、O 2768-1. Geometrical tolerances shall be in accordance with the designation as described in ISO 2768-2. NOTE All figures in this International Standard indicate tolerance requirements using the ISO code “ISO 2768-mk” as described in ISO 2768-1 and ISO 2768-2. Copyright International Organization fo
36、r Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) ISO 2007 All rights reserved 3 6 Ports usage and identification
37、 6.1 Interchangeability of cartridge valves in the cavities defined by this International Standard requires uniform identifications and functions of the valve ports. Symbols for the valve types intended for use in each cavity are shown in Tables 2, 4, 6, 8, 10, 12, 14, 16 and 18. Port usage and iden
38、tification (1, 2, 3 and 4) are shown on the symbols. 6.2 The tabulated symbols illustrate general types of valves. Variations within each type shall conform to the port usage convention shown for that type. 6.3 Some of the tabulated symbols are commonly combined with other graphic elements to repres
39、ent a complete valve. For example, the four-port directional control valve shown in Table 10 normally includes operators such as solenoids or springs. Interchangeability of such complete valves requires that the combined symbols, including the added elements, be identical as to port connection in ea
40、ch operator condition. 6.4 The manifold identification shall be in accordance with ISO 16874. 7 Identification statement (Reference to this International Standard) It is strongly recommended to manufacturers who choose to conform to this International Standard that the following statement be used in
41、 test reports, catalogues and sales literature: “Cavity dimensions and port usage are in accordance with ISO 7789:2007, Hydraulic fluid power Two-, three- and four-port screw-in cartridge valves Cavities.” Copyright International Organization for Standardization Provided by IHS under license with IS
42、O Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7789:2007(E) 4 ISO 2007 All rights reserved Key 1, 2, ports NOTE The same designations are used in Table 2. PD (thread) pitch diame
43、ter VE visual examination a The dimensions given are the minimum space required for a screw-in cartridge valve with an allowance for using an axially fitting tool, such as a box spanner, to tighten the cartridge; if it is necessary to use a flat spanner, then adequate clearance should be provided. T
44、his is also the minimum recommended distance between centres of two similarly sized cavities. Connectors on electrically operated valves may exceed this space dimension and allowance shall be made for fitting and removing any such connectors. b No burrs permitted in this area, the edge must be round
45、ed. The cavity geometry is normally produced with an appropriate multi-diameter form tool. Sharp edges should be avoided by rounding to a radius of 0,1 mm to 0,2 mm. c Radial groove optional. d Datum area inside ring nose. e The port is in accordance with ISO 6149-1. Figure 1 Cavities for two-port v
46、alves (excluding pressure-relief valves) with 5 mm to 20,5 mm maximum port diameter Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 02:56:35 MDTNo reproduction or networkin
47、g permitted without license from IHS -,-,- ISO 7789:2007(E) ISO 2007 All rights reserved 5 Table 1 Dimensions for cavities for two-port valves (excluding pressure-relief valves) with 5 mm to 20,5 mm maximum port diameter Dimensions in millimetres Dimension by codification a Parameter 18-01-0-07 20-0
48、1-0-07 22-01-0-07 27-01-0-07 33-01-0-07 42-01-0-07 Thread b M181,5 M201,5 M221,5 M272 M332 M422 D1 min. 32 38 42 48 58 74 D2 H8 15 17 19 23 29 38 D3 15 17 19 23 29 38 T1 min. 14,5 14,5 15,5 19 19 19,5 T2 min. 14,5 14,5 17 22 22 23 T3 max. 19,5 20,5 27,5 35 38,5 43,5 (T4) 20 21 28 35,5 39 44 0,4 50 T + 21,3 22,3 29,3 37,2 40,7 45,7 T6 min. c 29,5 30,5 38,