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1、Reference number ISO 3069:2000(E) ISO 2000 INTERNATIONAL STANDARD ISO 3069 Second edition 2000-11-01 End-suction centrifugal pumps Dimensions of cavities for mechanical seals and for soft packing Pompes centrifuges aspiration en bout Dimensions des logements de garnitures mcaniques et de tresses Cop
2、yright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) PDF disclaimer This PDF file may
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4、sibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
5、 parameters 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. ISO 2000 All rights reserved. Unless ot
6、herwise 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 the requester. ISO copyri
7、ght office Case postale 56 ? CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2000 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Techn
8、ical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) ISO 2000 All rights reservediii ContentsPage Foreword.iv 1Scope 1 2Normative references1 3Terms and definitions .1 4Specification of dimensions o
9、f seal cavity and seal gland plate attachments .3 4.1Dimensions of stuffing box and seal cavity attachments for general-purpose duties (designated ISO 3069-S)3 4.2Dimensions of seal cavity and seal gland plate attachments for heavy-duty process applications (designated ISO 3069-H) .5 5Design require
10、ments for seal cavities.7 5.1Vent and drain7 5.2Squareness and concentricity of surfaces .7 Annex A (informative) Dimensions of cavities for cartridge mechanical seals for general-purpose duties (designated ISO 3069-C)8 Bibliography10 Copyright International Organization for Standardization Provided
11、 by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) iv ISO 2000 All rights reserved Foreword ISO (the International Organization for Standardizatio
12、n) 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 technical committee has been established has the right to be rep
13、resented 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 of electrotechnical standardization. International Standards a
14、re drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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 least 75 % of the member bodies casting
15、a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 3069 was prepared by Technical Committee ISO/TC 115,
16、 Pumps, Subcommittee SC 1, Dimensions and technical specifications of pumps. This second edition cancels and replaces the first edition (ISO 3069:1974), which has been technically revised by having a broadened scope and the inclusion of an alternative heavy-duty seal cavity. The previously published
17、 cavity dimensions have not been amended, but the sizes available have been increased. To meet the growing demand for cartridge mechanical seals, an informative annex has been included to assist in the rationalization of seal cavity dimensions for this product group. The dimensional recommendations
18、have been applied to seal chambers with parallel bores, although reference is made, where appropriate, to the equivalent performance of conical shaped seal chambers. Annex A of this International Standard is for information only. Copyright International Organization for Standardization Provided by I
19、HS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 3069:2000(E) ISO 2000 All rights reserved1 End-suction centrifugal pumps Dimensions of cavi
20、ties for mechanical seals and for soft packing 1Scope This International Standard specifies the dimensions of the seal cavity for step-balanced mechanical seals, mechanical seals suitable for straight shafts, and for soft packing, to be used with horizontal end-suction centrifugal pumps, including t
21、hose conforming to ISO 2858. Although applicable to general-purpose and heavy-duty process applications, this International Standard is not intended for use in processes with slurries or with high levels of solids. This International Standard offers two options: a)a range of stuffing boxes suitable
22、for soft packing or mechanical seals for general-purpose duties up to a seal chamber limit of a gauge pressure of 16 bar; b)a range of larger cavities suitable for mechanical seals, including cartridge mechanical seals, for general and heavy-duty process applications, up to a seal chamber limit of a
23、 gauge pressure of 40 bar. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply.
24、However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO
25、and IEC maintain registers of currently valid International Standards. ISO 5199, Technical specifications for centrifugal pumps Class II. ISO 9905, Technical specifications for centrifugal pumps Class I. ISO 9908, Technical specifications for centrifugal pumps Class III. EN 12756, Mechanical seals P
26、rincipal dimensions, designation and material codes. 3Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 cartridge mechanical seal a completely self-contained unit (including mechanical seal, gland plate, sleeve, and mating ring), pr
27、e-assembled and preset before installation Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO
28、3069:2000(E) 2 ISO 2000 All rights reserved 3.2 flush flow of fluid introduced into the seal cavity on the process fluid side, in close proximity to the sealing faces, and usually used for cooling the mechanical seal and continuously removing vapour and/or contaminants from the seal cavity 3.3 gland
29、 face mounting arrangement and equipment surface to which the seal gland plate is clamped NOTEThis is normally the seal end of the seal chamber. 3.4 seal cavity fluid-filled space contained by the seal chamber NOTEThe mechanical seal rotates in the seal cavity. 3.5 seal chamber component, either int
30、egral with or separate from the pump case, forming the containment between the shaft and casing NOTEThe mechanical seal is installed in the seal chamber. 3.6 seal gland plate end plate connecting the stationary assembly of a mechanical seal to the seal chamber 3.7 spigot male part of a joint used fo
31、r accurate radial location of two machined components 3.8 stuffing box cylindrical seal chamber, designed for the use of soft packing, for the purpose of reducing leakage along the shaft 3.9 total axial run-out tolerance tolerance zone limited by two parallel planes, a defined distance apart, and pe
32、rpendicular to the shaft datum axis NOTEIt can be measured by securing a dial indicator to the shaft, rotating it against a specified perpendicular surface (normally the gland face) and measuring the full indicated movement over several revolutions. 3.10 total radial run-out tolerance tolerance zone
33、 limited by two coaxial cylinders, the defined radial distance apart, whose axes coincide with the datum axis NOTEIt can be measured by securing a dial indicator to the datum axis component (the shaft or seal chamber, depending on the tolerance zone to be recorded) and measuring the full indicated m
34、ovement against the specified adjacent cylindrical surface over several revolutions. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking per
35、mitted without license from IHS -,-,- ISO 3069:2000(E) ISO 2000 All rights reserved3 4Specification of dimensions of seal cavity and seal gland plate attachments 4.1Dimensions of stuffing box and seal cavity attachments for general-purpose duties (designated ISO 3069-S) The diameters shown in Figure
36、s 1, 2 and 3 shall have the values given in Table 1, and are intended to permit the use of either gland packing or mechanical seals. Figure 1 Mechanical seal or soft packing with or without a sleeve Figure 2 Step-balanced mechanical seal with or without a short sleeve Figure 3 Step-balanced mechanic
37、al seal with an extended sleeve Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E
38、) 4 ISO 2000 All rights reserved Table 1 Stuffing box and seal cavity dimensions Dimensions in millimetres d1 (h6)a d2 (h6) Min.bd3cMin.bd4 18223438 20243640 22263842 24284044 25304146 28334449 30354651 32d 384858 33384958 35405160 38435863 40456065 43486368 45506570 48536873 50557075 53587383 55607
39、585 58d 638388 60658590 63d 688893 65709095 68d 93 707595104 7580104109 8085109114 8590114119 9095119124 95100124129 100105129134 a h6 tolerance is not applicable to d1of Figure 2 and Figure 3. b Mechanical seal reliability is affected by the radial clearance between its rotating parts and the seal
40、chamber bore. Arduous services such as those with significant solid content, or those that could result in excessive seal face temperature, should have a minimum 3 mm radial clearance. This is particularly important in the case of unflushed mechanical seals, for which conical shaping of the bore can
41、 additionally contribute to the performance of the seal. c H11 tolerance when used with soft packing. d Non-preferred sizes, should not be used for new designs. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545
42、001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) ISO 2000 All rights reserved5 Dimensions suitable for cartridge mechanical seals are shown in annex A. Mechanical seals designed to meet the dimensions required by EN 12
43、756 will fit the seal cavity ISO 3069-S. 4.2Dimensions of seal cavity and seal gland plate attachments for heavy-duty process applications (designated ISO 3069-H) The dimensions shown in Figures 4, 5 and 6 shall have the values given in Table 2. NOTEThe design is suitable for cartridge mechanical se
44、als, but is unlikely to be available in pumps conforming to ISO 2858 because of its dimensional constraints. Key 1To nearest obstruction a Minimum radial 3 mm Figure 4 Seal cavity Key 14 off studs d8 Figure 5 Gland face and studs Copyright International Organization for Standardization Provided by I
45、HS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) 6 ISO 2000 All rights reserved Figure 6 Optional external spigot Table 2 Dimensions of seal cavity a
46、nd seal gland plate attachments Dimensions in millimetres Max. d5 (h6) d6 (H7) d7 (? 0,5) d8d9 (H7/f7) Min. L1Min. L2 2070105M12?1,7585150100 3080115M12?1,7595155100 4090125M12?1,75105160100 50100140M16?2,0115165110 60120160M16?2,0135170110 70130170M16?2,0145175110 80140180M16?2,0155180110 90160205M
47、20?2,5175185120 100170215M20?2,5185190120 110180225M20?2,5195195120 NOTE 1The gland plate should be radially located by an internal spigot in the bore dimension d6. NOTE 2An optional external spigot is shown in Figure 6. Copyright International Organization for Standardization Provided by IHS under
48、license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:05:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3069:2000(E) ISO 2000 All rights reserved7 5Design requirements for seal cavities 5.1Vent and drain Mechanical seal reliability can be adversely affected by periods of operation in air or gas. Therefore the