1、BSI Standards Publication BS ISO 7241:2014 Hydraulic fluid power Dimensions and requirements of quick-action couplingsBS ISO 7241:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 7241:2014. It supersedes BS 7198-1:1989 which is withdrawn. The UK participa
2、tion in its preparation was entrusted to Technical Committee MCE/18/-/4, Connectors and associated components. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. U
3、sers are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 76596 4 ICS 23.100.40 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the autho
4、rity of the Standards Policy and Strategy Committee on 31 July 2014. Amendments issued since publication Date Text affectedBS ISO 7241:2014 ISO 2014 Hydraulic fluid power Dimensions and requirements of quick-action couplings Transmissions hydrauliques Dimensions et exigences des raccords rapides INT
5、ERNATIONAL STANDARD ISO 7241 First edition 2014-07-15 Reference number ISO 7241:2014(E)BS ISO 7241:2014ISO 7241:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized othe
6、rwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office
7、 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 SwitzerlandBS ISO 7241:2014ISO 7241:2014(E) ISO 2014 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 Terms and
8、definitions . 1 4 Dimensional requirements . 2 5 Performance requirements . 7 6 Additional requirements for Series A quick-action couplings for use in agricultural machinery applications . 8 6.1 General . 8 6.2 Connecting and disconnecting 8 6.3 Fluid loss 8 6.4 Valve performance . 8 7 Workmanship 9
9、 8 Designation 9 9 Marking 9 10 Identification statement (reference to this International Standard) 9 Bibliography .10BS ISO 7241:2014ISO 7241:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wor
10、k 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-governme
11、ntal, 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. The procedures used to develop this document and those intended for its further maintenance are described in th
12、e ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the poss
13、ibility 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list o
14、f patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well a
15、s information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and compone
16、nts. This first edition of ISO 7241 cancels and replaces ISO 7241-1:1987, which has been technically revised.iv ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E) Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an en
17、closed circuit. Quick-action couplings are used to join or separate fluid conductors quickly and without the use of tools or special devices. When hydraulic quick-action couplings are used on agricultural machinery, the female coupling half is normally assembled on the tractor and the male coupling
18、half is normally assembled on the tractor attachment. ISO 2014 All rights reserved vBS ISO 7241:2014BS ISO 7241:2014Hydraulic fluid power Dimensions and requirements of quick-action couplings 1 Scope This International Standard specifies the interface dimensions and basic performance requirements fo
19、r two series of hydraulic quick-action couplings. Both series are in widespread use and have similar technological advantages. Series A is used predominantly in Europe and is preferred worldwide for agricultural and forestry machinery, and this International Standard also specifies additional requir
20、ements for Series A for use in agricultural machinery applications covered in ISO 5675. Series B is used predominantly in North America and in the chemical industry. 2 Normative references The following documents, in whole or in part, are referenced in this document and are indispensable for its app
21、lication. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2944, Fluid power systems and components Nominal pressures ISO 3448, Industrial liquid lubricants ISO viscosity classification
22、 ISO 5598, Fluid power systems and components Vocabulary ISO 5675, Agricultural tractors and machinery General purpose quick-action hydraulic couplers ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 18869 1) , Hydraulic fluid pow
23、er Test methods for couplings actuated with or without tools 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598 and the following apply. 3.1 coupling valve opening force maximum force required to fully open the hydraulic quick-action coupling valve
24、 when the pressure inside the coupling is at zero 3.2 female half receptacle portion of a quick-action coupling which normally includes the mechanism to lock the two halves of quick-action coupling together 3.3 interface that portion of a coupling half that establishes and controls interchangeabilit
25、y 3.4 male half probe portion of a quick-action coupling which fits and locks into the female half 1) This International Standard is under development. INTERNATIONAL ST ANDARD ISO 7241:2014(E) ISO 2014 All rights reserved 1BS ISO 7241:2014ISO 7241:2014(E) 4 Dimensional requirements 4.1 Dimensional r
26、equirements for Series A hydraulic quick-action couplings are shown in Figure 1 and given in Table 1. Surface roughness values in micrometres Key a Dimension D 1is the gauge diameter. b The shape of the valve is optional, and dimension D 4is used unless the valve has a spherical form. c Dimension L
27、4is measured to the ball. d Dimension D 5is the diameter of the gauge ball. e The shape of the groove that receives the bearings in the coupled position is left to the manufacturer. f Maximum valve travel against stop. g Minimum length of diameter D 3. h Minimum hardness shall be 86HR 15N at ball co
28、ntact point, in accordance with ISO 6508-1. Figure 1 Dimensional requirements for Series A couplings2 ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E) Table 1 Dimensional requirements for Series A couplings Dimensions in millimetres Size a D 1 D 2 D 3 D 4 bmin. D 50,002 5 L 1max. L 2 c L
29、 3 L 4 L 5min. L 6max. L 7min. 1 6,3 18,7 12,9 13 11,73 11,86 1,9 3,968 2,8 0,7 1,5 5,5 5,7 6,6 6,8 14,5 0,5 3,7 44 46 10 24,1 18,3 18,4 17, 2 17, 3 3 3,968 3,8 0,7 1,5 8,8 9 9,8 10 18 0,5 7 12,5 30,3 23,66 23,74 20,48 20,56 4,5 4,762 4 0,7 1,5 9,2 9,4 11,6 11,8 24 0,5 8 20 37,1 30,4 30,5 29 29,1 5,
30、4 4,762 7, 2 1 2,5 15,9 16,1 17, 5 17,7 27, 5 0,6 13,7 25 43,0 36,5 36,6 34,21 34,34 7, 8 4,762 8,5 1,5 3 19,7 20 22,8 23 34 0,7 16,3 31,5 56,0 47,7 47, 8 44,9 45 8,9 6 11 2 4,5 24,9 25,1 28,4 28,6 43 0,7 24 40 68,5 57, 5 57,6 54,9 55 9,9 8 13 3 6 30,6 30,8 33,7 33,9 51 0,8 29,6 50 83,7 69,9 70 65 6
31、5,1 9,9 10 16,6 3 7 35 35,2 39,6 39,8 61 0,8 34 aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397. bUse dimension D 4unless the valve has a spherical form; spherical form is not preferred. cRadius or chamfer length. Radius with cham
32、fer is optional. 4.2 Additional dimensional requirements for Series A hydraulic quick-action couplings used in agricultural applications are shown in Figure 2 and given in Table 2. Key a Shape of neck between L 8and L 9is optional but shall be circular to accommodate dust sealing. Figure 2 Additiona
33、l dimensional requirements for Series A couplings used in agricultural applications ISO 2014 All rights reserved 3BS ISO 7241:2014ISO 7241:2014(E) Table 2 Additional dimensional requirements for Series A couplings used in agricultural applications Dimensions in millimetres Size a D 6max. L 8min. L 9
34、min. 12,5 31 28,5 32,7 20 38 27, 5 aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397. 4.3 Dimensional requirements for Series B hydraulic quick-action couplings are shown in Figures 3 and 4, and given in Tables 3 and 4. Surface roug
35、hness values in micrometres Key a Dimension D 7is the gauge diameter. b Dimension L 13is measured to the ball. c Diameter D 11is the diameter of the gauge ball. d Valve is flush to minus from end of coupling when against stop. e Minimum hardness shall be 86HR 15N at ball contact point, in accordance
36、 with ISO 6508-1. f The shape of the groove that receives the bearings in the coupled position is left to the manufacturer. Figure 3 Dimensional requirements for Series B couplings Sizes 5 to 254 ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E) Table 3 Dimensional requirements for Series
37、 B couplings Sizes 5 to 25 Dimensions in millimetres Size a Gauge diameter D 7 D 8 D 9 D 10min. D 110,002 5 L 10max. L 11 b L 12min. L 13 L 14min. L 15max. 2max. 5 16,69 12,09 12,19 10,8 10,9 2,16 3,175 2,79 0,64 1,32 7,87 11,28 11,48 18,92 0,5 16 6,3 21,21 15,6 15,7 14,1 14,2 2,54 3,967 4,06 1,07 1
38、,73 9,65 13,41 13,61 22,1 0,5 10 26,87 20,04 20,14 19 19,1 3,05 4,763 4,83 1,07 1,73 12,45 15,52 15,72 24,89 0,5 12,5 33,45 25,65 25,76 23,44 23,55 4,57 5,555 5,08 1,07 1,73 12,19 17,17 17, 37 27,94 0,5 20 41,66 32,66 32,77 31,34 31,45 5,08 6,35 7, 37 1,45 2,51 18,8 22,86 23,06 35,56 0,6 25 49,38 40
39、,46 40,56 37,69 37, 8 6,1 6,35 8,64 1,45 2,51 20,57 27, 36 27, 56 40,39 0,7 aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397. bRadius or chamfer length. Radius with chamfer is optional. ISO 2014 All rights reserved 5BS ISO 7241:201
40、4ISO 7241:2014(E) Surface roughness values in micrometres Key a Dimension D 12is the gauge diameter. b Dimension L 18is measured to the ball. c Diameter D 17is the diameter of the gauge ball. d The shape of the groove that receives the bearings in the coupled position is left to the manufacturer. e
41、Valve closed. f Valve open against stop. g Minimum hardness shall be 86HR 15N at ball contact point, in accordance with ISO 6508-1 . Figure 4 Dimensional requirements for Series B couplings Sizes 40 and 50 Table 4 Dimensional requirements for Series B couplings Sizes 40 and 50 Dimensions in millimet
42、res Size a Gauge diameter D 12 D 13 D 14 D 15min. D 16 L 16 b L 17min. L 18 L 19min. L 20max. L 21 D 170,002 5 3max. 40 59,13 47,96 48,06 44,4 44,5 8,89 38,05 38,15 1,4 2,54 32,56 38,91 39,17 53,34 10 26,36 26,87 7,938 21 50 85,6 66,55 66,68 63,14 63,27 10,16 53 53,16 1,4 2,54 38,1 45,16 45,42 65,02
43、 15 32 32,51 12,7 aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397. bRadius or chamfer length. Radius with chamfer is optional.6 ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E) 5 Performance requirements 5.1 The perfor
44、mance values specified in this International Standard apply to standard couplings made from carbon steel. The use of any combination of other materials and related performance values shall be agreed between the customer and manufacturer. 5.2 Series A and B hydraulic quick-action couplings shall meet
45、 or exceed the maximum working pressure and minimum burst pressure ratings given in Tables 5 and 6. See Clause 6 and Table 7 for additional requirements for Series A quick-action couplings for use in agricultural machinery applications. Table 5 Performance requirements for Series A couplings Charact
46、eristic Performance requirements by coupling size a 6,3 10 12,5 20 25 31,5 40 50 Maximum rated pres- sure in accordance with ISO 2944 31,5 MPa (315 bar b ) 31,5 MPa (315 bar) 25 MPa (250 bar) 25 MPa (250 bar) 20 MPa (200 bar) 20 MPa (200 bar) 16 MPa (160 bar) 10 MPa (100 bar) Minimum burst pres- sur
47、e 126 MPa (1 260 bar) 126 MPa (1 260 bar) 100 MPa (1 000 bar) 100 MPa (1 000 bar) 80 MPa (800 bar) 80 MPa (800 bar) 64 MPa (640 bar) 40 MPa (400 bar) Rated flow 3 l/min 23 l/min 45 l/min 106 l/min 189 l/min 288 l/min 379 l/min 757 l/min Maximum pressure drop at rated flow 130 kPa (1,3 bar) 180 kPa (
48、1,8 bar) 200 kPa (2 bar) 200 kPa (2 bar) 250 kPa (2,5 bar) 200 kPa (2 bar) 200 kPa (2 bar) 200 kPa (2 bar) Rated surge flow 9 l/min 69 l/min 135 l/min 300 l/min 567 l/min 864 l/min 1 137 l/min 2 271 l/min Maximum fluid loss per disconnect 1 ml 2 ml 2,5 ml 9 ml 25 ml 60 ml 90 ml 150 ml aThe size desi
49、gnation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397. b1 bar = 10 5Pa = 0,1 MPa = 100 kPa; 1 Pa = 1 N/m 2 . Table 6 Performance requirements for Series B couplings Characteristic Performance requirements by coupling size a 5 6,3 10 12,5 20 25 40 50 Maximum rated pres- sure in accordance with ISO 2944 25 MPa (250 bar) 25 MPa (250 bar) 25 MPa (250 bar) 25 MPa (250 bar) 16 MPa (160 bar) 10 MPa (100 bar) 6,3 MPa (63 bar) 5 MPa (50 bar) M
