1、BSI Standards PublicationBS ISO 7241:2014Hydraulic fluid power Dimensions and requirementsof quick-action couplingsBS ISO 7241:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 7241:2014. Itsupersedes BS 7198-1:1989 which is withdrawn.The UK participation in
2、 its preparation was entrusted to TechnicalCommittee MCE/18/-/4, Connectors and associated components.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are res
3、ponsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 76596 4ICS 23.100.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandard
4、s Policy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 7241:2014 ISO 2014Hydraulic fluid power Dimensions and requirements of quick-action couplingsTransmissions hydrauliques Dimensions et exigences des raccords rapidesINTERNATIONAL STANDARDISO724
5、1First edition2014-07-15Reference numberISO 7241:2014(E)BS ISO 7241:2014ISO 7241:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means
6、, 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 officeCase postale 56 CH-1211 Geneva 20T
7、el. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 7241:2014ISO 7241:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Dimensional requirements . 25
8、 Performance requirements . 76 Additional requirements for Series A quick-action couplings for use in agricultural machinery applications . 86.1 General . 86.2 Connecting and disconnecting 86.3 Fluid loss 86.4 Valve performance . 87 Workmanship 98 Designation 99 Marking 910 Identification statement
9、(reference to this International Standard) 9Bibliography .10BS ISO 7241:2014ISO 7241:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried o
10、ut 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-governmental, in liaison with ISO, also take part in the work. ISO c
11、ollaborates 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 the ISO/IEC Directives, Part 1. In particular the different app
12、roval 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 possibility that some of the elements of this document may be the
13、 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 of patent declarations received (see www.iso.org/patents). Any
14、 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 as information about ISOs adherence to the WTO principles in th
15、e Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components.This first edition of ISO 7241 cancels and replaces ISO 724
16、1-1:1987, which has been technically revised.iv ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E)IntroductionIn hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Quick-action couplings are used to join or separat
17、e 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 half is normally assembled on the tractor attachment. ISO 2014 All
18、rights reserved vBS ISO 7241:2014BS ISO 7241:2014Hydraulic fluid power Dimensions and requirements of quick-action couplings1 ScopeThis International Standard specifies the interface dimensions and basic performance requirements for two series of hydraulic quick-action couplings. Both series are in
19、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 requirements for Series A for use in agricultural machinery applications co
20、vered in ISO 5675. Series B is used predominantly in North America and in the chemical industry.2 Normative referencesThe following documents, in whole or in part, are referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For und
21、ated references, the latest edition of the referenced document (including any amendments) applies.ISO 2944, Fluid power systems and components Nominal pressuresISO 3448, Industrial liquid lubricants ISO viscosity classificationISO 5598, Fluid power systems and components VocabularyISO 5675, Agricult
22、ural tractors and machinery General purpose quick-action hydraulic couplersISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)ISO 188691), Hydraulic fluid power Test methods for couplings actuated with or without tools3 Terms and definit
23、ionsFor the purposes of this document, the terms and definitions given in ISO 5598 and the following apply.3.1coupling valve opening forcemaximum force required to fully open the hydraulic quick-action coupling valve when the pressure inside the coupling is at zero3.2female halfreceptacle portion of
24、 a quick-action coupling which normally includes the mechanism to lock the two halves of quick-action coupling together3.3interfacethat portion of a coupling half that establishes and controls interchangeability3.4male halfprobe portion of a quick-action coupling which fits and locks into the female
25、 half1) This International Standard is under development.INTERNATIONAL STANDARD ISO 7241:2014(E) ISO 2014 All rights reserved 1BS ISO 7241:2014ISO 7241:2014(E)4 Dimensional requirements4.1 Dimensional requirements for Series A hydraulic quick-action couplings are shown in Figure 1 and given in Table
26、 1.Surface roughness values in micrometresKeyaDimension D1is the gauge diameter.bThe shape of the valve is optional, and dimension D4is used unless the valve has a spherical form.cDimension L4is measured to the ball.dDimension D5is the diameter of the gauge ball.eThe shape of the groove that receive
27、s the bearings in the coupled position is left to the manufacturer.fMaximum valve travel against stop.gMinimum length of diameter D3.hMinimum hardness shall be 86HR 15N at ball contact point, in accordance with ISO 6508-1.Figure 1 Dimensional requirements for Series A couplings2 ISO 2014 All rights
28、reservedBS ISO 7241:2014ISO 7241:2014(E)Table 1 Dimensional requirements for Series A couplingsDimensions in millimetresSizeaD1D2D3D4bmin.D50,002 5L1max.L2cL3L4L5min.L6max.L7min.16,3 18,712,9 1311,73 11,861,9 3,968 2,80,7 1,55,5 5,76,6 6,814,5 0,5 3,744 4610 24,118,3 18,417,2 17,33 3,968 3,80,7 1,58
29、,8 99,8 1018 0,5 712,5 30,323,66 23,7420,48 20,564,5 4,762 40,7 1,59,2 9,411,6 11,824 0,5 820 37,130,4 30,529 29,15,4 4,762 7,21 2,515,9 16,117,5 17,727,5 0,6 13,725 43,036,5 36,634,21 34,347,8 4,762 8,51,5 319,7 2022,8 2334 0,7 16,331,5 56,047,7 47,844,9 458,9 6 112 4,524,9 25,128,4 28,643 0,7 2440
30、 68,557,5 57,654,9 559,9 8 133 630,6 30,833,7 33,951 0,8 29,650 83,769,9 7065 65,19,9 10 16,63 735 35,239,6 39,861 0,8 34aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397.bUse dimension D4unless the valve has a spherical form; spher
31、ical form is not preferred.cRadius or chamfer length. Radius with chamfer 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.KeyaShape of neck between L8and L9is optional but s
32、hall be circular to accommodate dust sealing.Figure 2 Additional 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 app
33、licationsDimensions in millimetresSizeaD6max.L8min.L9min.12,5 31 28,5 32,720 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
34、 and 4, and given in Tables 3 and 4.Surface roughness values in micrometresKeyaDimension D7is the gauge diameter.bDimension L13is measured to the ball.cDiameter D11is the diameter of the gauge ball.dValve is flush to minus from end of coupling when against stop.eMinimum hardness shall be 86HR 15N at
35、 ball contact point, in accordance with ISO 6508-1.fThe 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 Dimen
36、sional requirements for Series B couplings Sizes 5 to 25Dimensions in millimetresSizeaGauge diameter D7D8D9D10min.D110,002 5L10max.L11bL12min.L13L14min.L15max.2max.5 16,6912,09 12,1910,8 10,92,16 3,175 2,790,64 1,327,8711,28 11,4818,92 0,5166,3 21,2115,6 15,714,1 14,22,54 3,967 4,061,07 1,739,6513,4
37、1 13,6122,1 0,510 26,8720,04 20,1419 19,13,05 4,763 4,831,07 1,7312,4515,52 15,7224,89 0,512,5 33,4525,65 25,7623,44 23,554,57 5,555 5,081,07 1,7312,1917,17 17,3727,94 0,520 41,6632,66 32,7731,34 31,455,08 6,35 7,371,45 2,5118,822,86 23,0635,56 0,625 49,3840,46 40,5637,69 37,86,1 6,35 8,641,45 2,512
38、0,5727,36 27,5640,39 0,7aThe 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 7241:2014ISO 7241:2014(E)Surface roughness values in micromet
39、resKeyaDimension D12is the gauge diameter.bDimension L18is measured to the ball.cDiameter D17is the diameter of the gauge ball.dThe shape of the groove that receives the bearings in the coupled position is left to the manufacturer.eValve closed.fValve open against stop.gMinimum hardness shall be 86H
40、R 15N at ball contact point, in accordance with ISO 6508-1.Figure 4 Dimensional requirements for Series B couplings Sizes 40 and 50Table 4 Dimensional requirements for Series B couplings Sizes 40 and 50Dimensions in millimetresSizeaGauge diameter D12D13D14D15min.D16L16bL17min.L18L19min.L20max.L21D17
41、0,002 53max.40 59,1347,96 48,0644,4 44,58,8938,05 38,151,4 2,5432,5638,91 39,1753,34 1026,36 26,877,9382150 85,666,55 66,6863,14 63,2710,1653 53,161,4 2,5438,145,16 45,4265,02 1532 32,5112,7aThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see I
42、SO 4397.bRadius or chamfer length. Radius with chamfer is optional.6 ISO 2014 All rights reservedBS ISO 7241:2014ISO 7241:2014(E)5 Performance requirements5.1 The performance values specified in this International Standard apply to standard couplings made from carbon steel. The use of any combinatio
43、n 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 or exceed the maximum working pressure and minimum burst pressure ratings given in Tables 5 and 6. See Clause 6 and Table 7 for add
44、itional requirements for Series A quick-action couplings for use in agricultural machinery applications.Table 5 Performance requirements for Series A couplingsCharacteristicPerformance requirements by coupling sizea6,3 10 12,5 20 25 31,5 40 50Maximum rated pres-sure in accordance with ISO 294431,5 M
45、Pa (315 barb)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-sure126 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
46、 3 l/min 23 l/min 45 l/min 106 l/min189 l/min288 l/min379 l/min757 l/minMaximum pressure drop at rated flow130 kPa (1,3 bar)180 kPa (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/min567 l/min864 l
47、/min1 137 l/min2 271 l/minMaximum fluid loss per disconnect1 ml 2 ml 2,5 ml 9 ml 25 ml 60 ml 90 ml 150 mlaThe size designation corresponds to the nominal size of the hose recommended for use with the coupling; see ISO 4397.b1 bar = 105Pa = 0,1 MPa = 100 kPa; 1 Pa = 1 N/m2.Table 6 Performance require
48、ments for Series B couplingsCharacteristicPerformance requirements by coupling sizea5 6,3 10 12,5 20 25 40 50Maximum rated pres-sure in accordance with ISO 294425 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)Minimum burst
49、pres-sure100 MPa (1 000 bar)100 MPa (1 000 bar)100 MPa (1 000 bar)100 MPa (1 000 bar)64 MPa (640 bar)40 MPa (400 bar)25 MPa (250 bar)20 MPa (200 bar)Rated flow 3 l/min 12 l/min 23 l/min 45 l/min106 l/min189 l/min375 l/min560 l/minMaximum pressure drop at rated flow100 kPa (1 bar)100 kPa (1 bar)130 kPa (1,3 bar)130 kPa (1,3 bar)130 kPa (1,3 bar)150 kPa (1,5 bar)180 kPa (1,8 bar)200 kPa (2 bar)Rated surge flow 9 l/min 36 l/min 69 l/min 135 l/min 300 l/min 567 l/min1 125 l/min1 680 l/minMaximum
