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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 736-2 : 1997 The Eu
2、ropean Standard EN 736-2 : 1997 has the status of a British Standard ICS 01.040.23; 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Valves Terminology Part 2. Definition of components of valves BS EN 736-2 : 1997 This British Standard, having been prepared under the
3、direction of the Sector Board for Engineering, was published under the authority of the Standards Board and comes into effect on 15 December 1997 BSI 1997 ISBN 050 28905 2 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language ve
4、rsion of EN 736-2 : 1997. The UK participation in its preparation was entrusted to Technical Committee PSE/7/1. Valves Basic standards. which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposa
5、ls for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internat
6、ional or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of its
7、elf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r
8、Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN 736-2 : 1997 E EUROPEAN STANDARDEN 736-2 NORME EUROPE ENNE EUROPA ISCHE NORM August 1997 ICS 01.040.23; 23.060.01
9、Descriptors: Valves and fittings, components, vocabulary, multilingual nomenclature English version Valves Terminology Part2: Definition of components of valves Appareils de robinetterie Terminologie Partie 2: De finition des composants des appareils de robinetterie Armaturen Terminologie Teil 2: De
10、finition der Armaturenteile This European Standard was approved by CEN on 1997-07-24. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
11、and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsi
12、bility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether
13、lands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 736-2 : 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 69, Industrial valves, of the Secretariat which is held by AFNOR. This European Standard shall be given the status o
14、f a national standard, either by publication of an identical text or by endorsement, at the latest by February 1998, and conflicting national standards shall be withdrawn at the latest by February 1998. EN 736 comprises three parts: Part 1:Definition of types of valves Part 2:Definition of component
15、s of valves Part 3:Definition of terms According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ital
16、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions3 Annex A(informative) Glossary7 Page 3 EN 736-2 : 1997 BSI 1997 Introduction This is the first step in harmonizing the va
17、lve terminology in Europe. It is possible that other names of components or other definitions will be found in other European Standards. Experts establishing European Standards are asked to use the name of components and the definitions given in this standard. If other names of components or definit
18、ions are needed or already published in European Standards please contact the CEN/TC 69 Secretariat for adding or harmonizing the names of components and their definitions in these European Standards. 1 Scope This standard specifies the names of components of valves and their definitions. It has the
19、 purpose to provide a uniform terminology for all components of valves. This standard covers components common to more than one type of valve. Names of components and definitions specific to one type of valve will be found in the relevant product or performance standard. 2 Normative references This
20、European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publicat
21、ions apply to this European Standard, only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 736-1Valves Terminology Part 1: Definition of types of valves prEN 736-3Valves Terminology Part 3: Definition of terms 3 D
22、efinitions For the purposes of this standard the following definitions apply. 3.1 shell Pressure containing envelope of the valve. NOTE. It normally comprises the body and when included in the design a bonnet or cover and the body bonnet or body cover joint. 3.1.1 body Main component of the valve wh
23、ich provides the fluid flow passageways and the body ends. 3.1.1.1 straight pattern body Body having two body end ports and where the axis of the bonnet or cover is parallel to the faces of the body end ports. 3.1.1.2 angle pattern body Body having two body end ports and where the faces are at right
24、 angles. 3.1.1.3 oblique pattern body Body having two body end ports and where the axis of the bonnet or cover is not parallel to the faces of the body end ports. 3.1.1.4 double flanged body Body having two flanged body ends for connecting to corresponding flanges. 3.1.1.5 single flanged body A body
25、 with a single flange not being a body end flange, designed to be installed by bolting to adjacent pipe flange(s). NOTE. It can be suitable to close the end of the pipe line allowing dismantling of the downstream pipe line. 3.1.1.6 lug type body Body designed with threaded or unthreaded holes for bo
26、lting to the adjacent flange(s) of the pipeline. 3.1.1.7 wafer type body Body designed to be installed by clamping between flanges. 3.1.1.8 multi end body Body with more than two body end ports. 3.1.1.9 body end Part of the body provided with the means of connection to the piping component (excludin
27、g by-pass if fitted). 3.1.1.10 flanged end Body end provided with a flange for mating with a corresponding flange. 3.1.1.11 welding end Body end prepared for welding to a corresponding end of a component. Such body end can be of the butt welding or socket welding type. 3.1.1.12 butt welding end Body
28、 end prepared for welding to a component by abutting the ends and welding within the groove formed between the prepared ends. 3.1.1.13 socket welding end Body end prepared for insertion of a component end into the socket and joining and sealing by fillet welding. 3.1.1.14 threaded end Body end provi
29、ded with internal or external thread for mating with a corresponding threaded component. 3.1.1.15 socket end Body end prepared for connection to a spigot end. 3.1.1.16 spigot end Body end prepared for insertion in a socket. Page 4 EN 736-2 : 1997 BSI 1997 3.1.1.17 capillary end Body end prepared for
30、 connection to a tube by soldering or brazing. 3.1.1.18 compression end Body end prepared for connection to a tube by the compression of a ring or sleeve on to the outside surface of a tube by a tubing nut. 3.1.1.19 body end port Fluid flow opening in the body end. 3.1.1.20 body bonnet/cover flange
31、Flange on a body to which the bonnet or cover is bolted. 3.1.1.21 body bonnet/cover thread Thread on the body into or onto which the bonnet or cover is screwed. 3.1.1.22 boss Raised area on the surface of a component. 3.1.1.23 shell tapping Threaded hole in the wall of the shell. 3.1.1.24 by-pass Pi
32、ping loop provided to permit fluid flow from one side to the other side of the main valve obturator in its closed position. 3.1.2 bonnet Component of the shell which closes an opening in the body and contains an opening for the passage of the operating mechanism. 3.1.2.1 cover Component of the shell
33、 which provides a closure for an opening in the body. 3.1.2.2 bolted bonnet Bonnet connected to a body by bolting. 3.1.2.3 bolted cover Cover connected to a body by bolting. 3.1.2.4 screwed bonnet Bonnet which is screwed into or onto the body. 3.1.2.5 screwed cover Cover which is screwed into or ont
34、o the body. 3.1.2.6 welded bonnet Bonnet connected to the body by a weld which provides mechanical attachment and sealing. 3.1.2.7 welded cover Cover connected to the body by a weld which provides mechanical attachment and sealing. 3.1.2.8 union bonnet Bonnet connected to a body by means of a union
35、nut. 3.1.2.9 union cover Cover connected to a body by means of a union nut. 3.1.2.10 pressure sealed bonnet Bonnet connected to the body using a pressure seal joint. 3.1.2.11 pressure sealed cover Cover connected to the body using a pressure seal joint. 3.1.2.12 clamp ring Ring, which connects two c
36、omponents by means of clamping. 3.1.3 body bonnet/cover joint Connection of the valve body to the bonnet or the cover. 3.1.3.1 bonnet flange Flange on the bonnet by which the bonnet is bolted to the body. 3.1.3.2 cover flange Flange on the cover by which the cover is bolted to the body. 3.1.3.3 bonn
37、et thread Thread on the bonnet by which the bonnet is screwed into or onto the body. 3.1.3.4 cover thread Thread on the cover by which the cover is screwed into or onto the body. 3.1.3.5 bonnet bolting Bolting which connects the bonnet to the body. 3.1.3.6 cover bolting Bolting which connects the co
38、ver to the body. 3.1.3.7 union nut Threaded ring which connects the union bonnet or cover to the body. 3.1.3.8 body bonnet/cover gasket Gasket which seals the body bonnet/cover joint. NOTE. The gasket can be made in different shapes and of different materials. 3.1.3.9 pressure seal joint Body bonnet
39、/cover joint in which the internal fluid pressure increases the compressive loading on the bonnet/cover gasket or pressure seal ring. 3.1.3.10 pressure seal ring Ring which acts as the sealing component in a pressure seal joint. 3.1.3.11 seal weld Weld which provides a seal between two parts, for ex
40、ample body and bonnet/cover. 3.2 trim Functional components of a valve excluding the shell components which are in contact with the fluid inside the valve. NOTE. The components are specified in the relevant product standards. Page 5 EN 736-2 : 1997 BSI 1997 3.2.1 obturator Movable component of the v
41、alve whose position in the fluid flow path permits, restricts or obstructs the fluid flow. NOTE. The term disc has been commonly used in the English language. 3.2.2 operating mechanism Mechanism which translates the motion of the operating device to the motion of the obturator. 3.2.2.1 stem Componen
42、t extending through the shell which transmits the motion from the operating device to the obturator which has a linear motion. 3.2.2.2 rising stem Stem which has linear motion during the obturator travel. 3.2.2.3 non rising stem Stem which has no linear motion during the obturator travel. 3.2.2.4 in
43、side screw Operating thread of the stem which is in contact with the fluid inside the valve. 3.2.2.5 outside screw Operating thread of the stem which is not in contact with the fluid inside the valve. 3.2.2.6 stem nut Component of the operating mechanism mounted on the obturator which together with
44、the thread of the stem converts rotary motion into linear motion. 3.2.2.7 yoke bushing Fixed component of the operating mechanism mounted on the yoke which together with the thread of the stem converts rotary motion into linear motion. 3.2.2.8 yoke sleeve Rotating component of the operating mechanis
45、m mounted on the yoke which together with the thread of the stem converts rotary motion into linear motion. 3.2.2.9 yoke Component of a valve which supports the yoke sleeve, yoke bushing or the actuator. It can be a separate component or an integral part of the bonnet or actuator. 3.2.2.10 bonnet bu
46、shing Component in a bonnet which serves as a stem guide and can also provide a back seat seating surface. 3.2.2.11 shaft Component extending through the shell which transmits the motion from the operating device to the obturator which has a rotary motion. 3.2.3 seating Components associated with th
47、e seating surfaces. 3.2.3.1 seating surface Contacting surfaces of the obturator seat and the body seat which effect valve closure. 3.2.3.2 body seat Part of the body which provides the body seating surface. It can be integral or a separate component. 3.2.3.3 obturator seat Part of the obturator whi
48、ch provides the obturator seating surface. It can be integral or a separate component. 3.2.3.4 seat ring Separate component which provides the seating surface (see body seat ring and obturator seat ring). 3.2.3.5 body seat ring Separate component assembled in the body which provides a body seating s
49、urface. 3.2.3.6 obturator seat ring Separate component assembled to the obturator which provides an obturator seating surface. 3.2.3.7 hard facing Deposit of molten metallic material intended to provide wear resistance to the seating surfaces or other components. 3.2.3.8 soft seat Part made of soft material which provides the seating surface. NOTE. Examples of soft materials are PTFE, rubber, etc. 3.2.3.9 liner Replaceable component made of plastomer and/or elastomer designed to protect the shell from the fluid and incorporating the body seat.