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1、a Date: 22 September 2008 Origin: International Latest date for receipt of comments: 31 December 2008 Project no.: 2008/00797 Responsible committee: MCE/8 Compressors, pneumatic tools, pneumatic machines and vacuum technology Interested committees: Title: Draft BS ISO 12500-4: Filters for compressed
2、 air - Methods of test Part 4: Water Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact detail
3、s below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 December 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normall
4、y be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation
5、is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Informatio
6、n on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards
7、Online Service on the BSI web site http:/. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30
8、179131 DC Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the co
9、nsequent standard. Comments submitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If no comments are received to the contrary, then
10、 the UK will abstains. If the international standard is approved, it is possible the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given belo
11、w is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on
12、the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should
13、be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5
14、 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clari
15、fying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered tra
16、demarks, and Windows is a trademark of Microsoft Corporation. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STAN
17、DARD UNTIL PUBLISHED AS SUCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NAT
18、IONAL REGULATIONS. RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. DRAFT INTERNATIONAL STANDARD ISO/DIS 12500-4 International Organization for Standardization, 2008 INTERN
19、ATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ISO/TC 118/SC 4 Voting begins on: 2008-09-16 Secretariat: BSI Voting terminates on: 2009-02-16 Filters for compressed air Methods of test Part 4: Water Filtres pour air comprim Mthodes dessai Partie 4: Eau ICS 23.1
20、00.60 In accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformment aux dispositions de la Rsolution du Conseil 15/1993, ce document est distribu en version anglaise seulement. To expedite distribution, this document is circulat
21、ed as received from the committee secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at publication stage. Pour acclrer la distribution, le prsent document est distribu tel quil est parvenu du secrtariat du comit. Le travail de rdaction et de composition de
22、texte sera effectu au Secrtariat central de lISO au stade de publication. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI ISO/DIS 12500-4 ii ISO 2008 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes
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25、s 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 notice This ISO document is a Draft International Standard and is copyright-protect
26、ed by ISO. Except as permitted under the applicable laws of the users country, neither this ISO draft nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission
27、 being secured. Requests for permission to reproduce should be addressed to either ISO at the address below or ISOs member body in the country of the 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
28、 Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI ISO/DIS 12500-4 ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope1 2 Normative reference
29、s1 3 Terms and definitions.1 4 Units and symbols.1 5 Reference conditions2 6 Standard rating parameter .2 Table 2 - Test Flow at rated conditions3 7 Test equipment arrangement.4 Figure 1 Typical test arrangement.4 8 Test Method .5 8.1 Results5 Annex A (informative) Design guide for the water injecti
30、on apparatus .6 Figure A.1 Typical water injection apparatus.6 Annex B (informative) Sample test report form 7 Annex C (informative) Example test results sheet8 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI ISO/DIS 12500-4 iv ISO 2008 All rights reserved
31、Foreword ISO (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 which a t
32、echnical 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 all matters
33、 of electrotechnical standardization. International Standards are drafted in accordance with the rules given 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 circulate
34、d to the member bodies for voting. Publication as an International Standard requires approval by at least 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
35、for identifying any or all such patent rights. ISO 12500-4 was prepared by Technical Committee ISO/TC 118, Compressors, pneumatic tools and pneumatic machines, Subcommittee SC 4, Quality of compressed air. ISO 12500 consists of the following parts, under the general title Filters for compressed air
36、Methods of test: Part 1: Oil aerosols Part 2: Oil vapours Part 3: Particles (in preparation) Part 4: Water (in preparation) Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI ISO/DIS 12500-4 ISO 2008 All rights reserved v Introduction The only topic of interes
37、t for this code is the ability of the device under investigation to separate water which has become entrained in the compressed air as a result of such mechanisms as condensation and wall flow on the compressed air pipework therefore no attempt is made here to produce a water aerosol. The test rig i
38、s designed to operate at the rated pressure and flow of the device under test. Water is introduced in to the upstream air at a controlled rate from a reservoir to which an over pressure compressed air supply has been applied using pressure regulation. The air flow in the test rig carries the water t
39、o the device for separation with any water carried over being measured in accordance with ISO8573-9. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI 1 Scope This test
40、 method is designed to determine the removal efficiency and operational pressure drop of any device designed for water removal from compressed air described as wall flow in ISO 8573-9. 2 Normative references The following referenced documents are indispensable for the application of this document. F
41、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.” ISO 1219 Fluid power systems and components - Graphic symbols and circuit diagrams - Part 1: Graphic symbols for conventional use and data-p
42、rocessing applications ISO 5598 Fluid power systems and components - Vocabulary ISO 7183:2007 Compressed air dryers - Specification and testing ISO 8573-1 Compressed air - Part 1: Contaminants and purity classes ISO 8573-9:2004 Compressed air - Test methods for liquid water content 3 Terms and defin
43、itions For the purposes of this document, the terms and definitions given in ISO 8573-1, ISO 5598 apply. 4 Units and symbols General use of SI units (Systme international dunits; see ISO 1000) as given throughout this International Standard is recommended. However, in agreement with accepted practic
44、e in the pneumatic field, some non-preferred SI units, accepted by ISO, are also used. 1 bar = 100 000 Pa NOTE Bar(e) is used to indicate effective pressure above atmospheric. 1 l (litre) = 0,001 m3 Symbols used are generally in accordance with ISO 1219-1. DRAFT INTERNATIONAL STANDARD ISO/DIS 12500-
45、4 ISO 2008 All rights reserved 1 Filters for compressed air Methods of test Part 4: Water Licensed CopyChinese University of Hong Kong, 21/10/2008 08:09, Uncontrolled Copy, (c) BSI ISO/DIS 12500-4 5 Reference conditions The reference conditions for gas volumes shall be: air temperature 20 C absolute
46、 air pressure 100 kPa 1 bar (a) relative water vapour pressure 0 6 Standard rating parameter The standard rating parameters are as identified in Table 1. Table 1 Standard rating parameters Reporting parameters Units Rating conditions Maintain within actual gauge value Instrument accuracy Inlet tempe
47、rature 0C 20 50C 20C Inlet Pressure kPa bar(e) 700 7 10 0,1 bar 10 0,1 bar Injected water per air flow (ml/min)/(l/s) 2 0,2 n.a. Ambient temperature 0C 20 5 20C Minimum compressed air purity a - ISO 8573-1 3 - 3 Air flow for testing m3/h 25%, 50, 75 100 125% rated flow 2% 4 % of gauge reading Pressu
48、re drop mbar Not applicable Not applicable 10 % of gauge reading a To ensure there is no liquid water present upstream of the test filter before injection. NOTE The reference conditions are as indicated in Clause 5 The preferred test pressure is 7 bar(e) but may be reduced as follows:- a) Where the manufacturers maximum pressure rating is other than 7 bar(e), or b) if there is insufficient flow capacity to satisfy the flow rating at standard pressure or c) it is desired to perform the test at a pressure other than 7 bar(e) In this case the test pressure can be reduced providing t