1、BSI Standards PublicationBS ISO 6953-2:2015Pneumatic fluid power Compressed air pressureregulators and filter-regulatorsPart 2: Test methods to determine the maincharacteristics to be included in literaturefrom suppliersBS ISO 6953-2:2015 BRITISH STANDARDNational forewordThis British Standard is the
2、 UK implementation of ISO 6953-2:2015. It supersedes BS ISO 6953-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/18/-/5, Control components.A list of organizations represented on this committee can be obtained on request to its secretary.Thi
3、s publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 76264 2ICS 23.100.50Compliance with a British Standard cannot confer i
4、mmunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 6953-2:2015 ISO 2015Pneumatic fluid power Compressed air pressure re
5、gulators and filter-regulators Part 2: Test methods to determine the main characteristics to be included in literature from suppliersTransmissions pneumatiques Rgulateurs de pression et filtres-rgulateurs pour air comprim Partie 2: Mthodes dessai pour dterminer les principales caractristiques inclur
6、e dans la documentation des fournisseursINTERNATIONAL STANDARDISO6953-2Second edition2015-03-01Reference numberISO 6953-2:2015(E)BS ISO 6953-2:2015ISO 6953-2:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specified, no part of this pu
7、blication may be reproduced or utilized otherwise 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 co
8、untry of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 6953-2:2015ISO 6953-2:2015(E)Foreword vIntroduction vi1 Scope .12 Normative references 13 Terms and definitions
9、.24 Symbols and terms .24.1 Symbols and units 24.2 Graphical symbols 25 Test conditions .25.1 Gas supply . 25.2 Temperature 25.3 Pressures 25.4 Inlet pressure . 25.5 Test pressures (regulated pressure) 36 Test procedure to verify rated pressure 37 Flow characteristics tests 47.1 Test installation 47
10、.2 General requirements . 57.3 Test procedures 57.3.1 Initial test procedure 57.3.2 Forward flow rate pressure characteristics test . 57.3.3 Relief flow rate pressure characteristics test . 67.3.4 Procedure for other regulated pressure values 67.4 Calculation of characteristics . 67.4.1 Characterist
11、ic curves 67.4.2 Flow rate pressure hysteresis . 77.4.3 Maximum forward sonic conductance 77.4.4 Maximum relief sonic conductance . 88 Pressure regulation test . 98.1 Test circuit . 98.2 Test procedure . 99 Maximum air consumption at null forward flow rate or relief flow rate for pilot-operated regu
12、lator with air bleed 99.1 Test installation 99.2 Test procedures . 109.3 Calculation of characteristics 1010 Special test procedures .1010.1 Pilot pressure/regulated pressure characteristics test in the case of external pilot- ISO 2015 All rights reserved iiiContents PageBS ISO 6953-2:2015ISO 6953-2
13、:2015(E)operated pressure regulators 1010.1.1 Test installation 1010.1.2 Test procedures1110.1.3 Calculation of characteristics . 1110.2 Optional resolution test for pilot-operated regulator with air bleed 1310.2.1 General. 1310.2.2 Test installation 1310.2.3 Test procedures1310.2.4 Calculation of c
14、haracteristics . 1410.3 Optional repeatability test . 1510.3.1 General. 1510.3.2 Test installation 1510.3.3 General test method .1610.3.4 Calculation of the repeatability value .1611 Presentation of data .1611.1 Flow-pressure characteristics 1611.2 Pressure regulation characteristics . 1611.3 Maximu
15、m air consumption for pilot operated regulators with air bleed .1611.4 Additional characteristics for pilot operated pressure regulators 1711.5 Optional data . 17Annex A (informative) Comparison of repeatability test methods 18Bibliography .35iv ISO 2015 All rights reservedBS ISO 6953-2:2015ISO 6953
16、-2:2015(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 out through ISO technical committees. Each member body interested in a subject for
17、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 collaborates closely with the International Electrotechnical Commission (IEC) on al
18、l 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 approval criteria needed for the different types of ISO documents should be noted. Th
19、is 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 subject of patent rights. ISO shall not be held responsible for identifying any or
20、 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 trade name used in this document is information given for the convenience of users
21、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 the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary i
22、nformation .The committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components.This second edition cancels and replaces the first edition (ISO 6953-2:2000), which has been technically revised.ISO 6953 consists of the foll
23、owing parts, under the general title Pneumatic fluid power Compressed air pressure regulators and filter-regulators: Part 1: Main characteristics to include in suppliers literature and product-marking requirements Part 2: Test methods to determine the main characteristics to be included in literatur
24、e from suppliers Part 3: Alternative test methods for measuring the flow-rate characteristics of pressure regulators ISO 2015 All rights reserved vBS ISO 6953-2:2015ISO 6953-2:2015(E)IntroductionIn pneumatic fluid power systems, power is transmitted and controlled through a gas under pressure within
25、 a circuit.When pressure reduction or pressure regulation is required, regulators and filter-regulators are components designed to maintain the pressure of the gas at an approximately constant level.It is therefore necessary to know the performance characteristics of these components in order to det
26、ermine their suitability in an application.vi ISO 2015 All rights reservedBS ISO 6953-2:2015Pneumatic fluid power Compressed air pressure regulators and filter-regulators Part 2: Test methods to determine the main characteristics to be included in literature from suppliers1 ScopeThis part of ISO 695
27、3 specifies test procedures and a method of presenting the results concerning the parameters which define the main characteristics to be included in literature from suppliers of regulators and filter-regulators conforming to ISO 6953-1.The purpose of this part of ISO 6953 is the following: to facili
28、tate the comparison of pressure regulators and filter-regulators by standardizing test methods and presentation of test data; to assist in the proper application of pressure regulators and filter-regulators in compressed air systems.The tests specified are intended to allow comparison among the diff
29、erent type of regulators and filter-regulators; they are not production tests to be carried out on each pressure regulator or filter-regulator manufactured.NOTE 1 The tests related to electro-pneumatic pressure control valves are specified in ISO 100942.NOTE 2 Use ISO 6953-3 for an alternative dynam
30、ic test method for flow-rate characteristics using an isothermal tank instead of a flow meter. However, this method measures only the decreasing flow rate part of the hysteresis curve of forward flow and relief flow characteristics.2 Normative referencesThe following documents, in whole or in part,
31、are referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1219-1, Fluid power systems and components Graphical symbols a
32、nd circuit diagrams Part 1: Graphical symbols for conventional use and data-processing applicationsISO 3448, Industrial liquid lubricants ISO viscosity classificationISO 5598, Fluid power systems and components VocabularyISO 6358-1, Pneumatic fluid power Determination of flow-rate characteristics of
33、 components using compressible fluids Part 1: General rules and test methods for steady-state flowISO 6953-1:2015, Pneumatic fluid power Compressed air pressure regulators and filter-regulators Part 1: Main characteristics to be included in literature from suppliers and product-marking requirementsI
34、SO 10094-1, Pneumatic fluid power Electro-pneumatic pressure control valves Part 1: Main characteristics to include in the suppliers literatureISO 10094-2, Pneumatic fluid power Electro-pneumatic pressure control valves Part 2: Test methods to determine main characteristics to include in the supplie
35、rs literatureINTERNATIONAL STANDARD ISO 6953-2:2015(E) ISO 2015 All rights reserved 1BS ISO 6953-2:2015ISO 6953-2:2015(E)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 6953-1, ISO 6358-1, ISO 10094-1, and ISO 5598 apply; in the order shown.4 Symbols
36、and terms4.1 Symbols and unitsThe symbols and units shall be in accordance with ISO 10094-2. See Table 1.Table 1 Symbols and unitsDescription Symbol SI unit Practical unitReference atmosphere patmPa kPa (bar)Inlet pressure p1Pa kPa (bar)Regulated pressure p2Pa kPa (bar)Forward volumetric flow rate a
37、t standard reference atmosphere qvfm3/s (ANR) dm3/min (ANR)Relief volumetric flow rate at standard reference atmosphere qvrm3/s (ANR) dm3/min (ANR)Reference temperature T0K or CaCInlet temperature T1K or CaCTemperature at the regulated port T2K or CaCaemperature in K is used for calculations; temper
38、ature in C is used for test conditions.NOTE 1 bar = 100 kPa = 0,1 MPa = 105Pa = 105N/m2.4.2 Graphical symbolsThe graphical symbols used in this part of ISO 6953 are in accordance with ISO 1219-1.5 Test conditions5.1 Gas supplyUnless otherwise specified, testing shall be conducted with compressed air
39、. If another gas is used, it shall be noted in the test report.5.2 TemperatureThe ambient fluid and the component under test shall be maintained at 23 C 10 C during all the tests.5.3 PressuresThe specified pressures shall be maintained within 2 %.5.4 Inlet pressureThe inlet pressure used for testing
40、 shall be the lower of the following pressures: the maximum regulated pressure, p2,max, plus 200 kPa (2 bar); the specified maximum inlet pressure, p1,max.2 ISO 2015 All rights reservedBS ISO 6953-2:2015ISO 6953-2:2015(E)5.5 Test pressures (regulated pressure)The preferential test pressures are chos
41、en as approximately equal to 25 %, 40 %, 63 %, and 80 % of the upper limit of recommended adjustable pressure range.6 Test procedure to verify rated pressure6.1 Perform this test on three random samples if a single-rated pressure is proposed for the entire product or on six random samples if separat
42、e ratings are proposed for the inlet and outlet sections. If the product uses a diaphragm, modify or replace it to withstand the pressure applied (diaphragms are excluded from the test criteria, but not the diaphragm support plates or any piston). Other product sealing means can be modified to preve
43、nt leakage and allow structural failure to occur during the test, but modifications shall not increase the structural strength of the pressure-containing envelope. For relieving regulators, the relieving system shall be blocked.6.2 Prepare the test samples as follows: If a single pressure rating is
44、proposed for the entire product, remove the control spring and replace it with a solid spacer whose length maintains the poppet in its approximately half-open position. Close the gauge ports and the inlet port with plugs, and perform all testing by applying pressure to the outlet port. For relieving
45、 regulators, the relieving system shall be blocked. If a separate pressure rating is proposed for the inlet and outlet sections of the regulator, relieve the control spring force on three of the samples. Using a proposed pressure rating for the inlet, perform testing on the inlet port, allowing the
46、poppet to be closed and keeping the outlet port open. Prepare the other three samples as described in previous indent and test them using a proposed pressure rating for the outlet port.6.3 The test should be done with a liquid which does not exceed ISO VG 32 (according to ISO 3448) or with compresse
47、d air. Maintain the temperature given in 5.2. When using a compressible medium, exercise safety precautions to contain an explosive failure.6.4 After stabilizing the temperature, slowly pressurize to a level of one-half its proposed rated pressure. Hold at this level for 2 min and observe for leakag
48、e or failure, as defined in 6.5.6.4.1 For products constructed of light alloys, brass, and steel, continue raising the pressure as above until a level of four times the proposed rated pressure has been reached.6.4.2 For products constructed of zinc, die cast alloys, or plastics with design operating
49、 temperatures of up to 50 C, continue raising the pressure as above until a level of four times the proposed rated pressure has been reached. with design operating temperature between 50 C to 80 C, continue raising the pressure as above until a level of five times the proposed rated pressure has been reached.6.5 The criterion for a failure is a fracture, separation of parts, or a crack, or that which can allow enough liquid to pass across the pressure-containing envelope to we
