1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Valves - TerminologyPart 1: Definition of types of valvesBS EN 7361:2018National forewordThis British Standard is the UK implementation of EN 7361:2018. It supersedes BS EN 7361:1995, which is withdrawn.The UK participa
2、tion in its preparation was entrusted to Technical Committee PSE/18/1, Industrial valves, steam traps, actuators and safety devices against excessive pressure Valves Basic standards.A list of organizations represented on this committee can be obtained on request to its secretary.This publication doe
3、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94737 7ICS 23.060.01; 01.040.23Compliance with a British Standard cannot confer immunit
4、y from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 7361:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 736-1Febr
5、uary 2018ICS 01.040.23; 23.060.01 Supersedes EN 7361:1995EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 7361:2018: EAll rights of exploitation in any form and by a
6、ny means reserved worldwide for CEN national MembersValves Terminology Part 1: Definition of types of valvesAppareils de robinetterie Terminologie Partie 1 : Dfinition des types dappareilsArmaturen Terminologie Teil 1: Definition der GrundbauartenThis European Standard was approved by CEN on 17 Dece
7、mber 2017.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. Uptodate lists and bibliographical references concerning such national standards may be obtai
8、ned on application to the CENCENELEC Management Centre 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 responsibility of a CEN member into its own language and notified to the CENCE
9、NELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
10、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 736-1:2018 (E)European forewordThis document (EN 7361:2018) has been prepared by Technical Committee CEN/TC 69
11、 “Industrial valves”, the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2018 and conflicting national standards shall be withdrawn at the latest by A
12、ugust 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 7361:1995.The main change to the previous version is the editor
13、ial revision of the standard.According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republ
14、ic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.2BS EN 7361:2018EN 736-1:2018 (E)European foreword 2
15、European foreword 41 Scope .52 Normative references 53 Terms and definitions .54 Types of valves related to design .54.1 Basic types 54.1.1 General54.1.2 Gate valve .54.1.3 Globe valve 54.1.4 Plug and ball valve 54.1.5 Butterfly valve and eccentric plug valve 64.1.6 Diaphragm valve. 64.2 Examples of
16、 basic types 85 Types of valves related to function 95.1 General .95.2 Isolating valve 95.3 Regulating valve .95.4 Control valve .95.5 Safety valve .95.6 Bursting disc safety device .95.7 Check valve 105.8 Diverting valve 105.9 Mixing valve 105.10 Automatic steam trap .105.11 Bleed valve .10Bibliogr
17、aphy .113Contents PageBS EN 7361:2018EN 736-1:2018 (E)European forewordThis document (EN 7361:2018) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by pub
18、lication of an identical text or by endorsement, at the latest by August 2018 and conflicting national standards shall be withdrawn at the latest by August 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held
19、 responsible for identifying any or all such patent rights.This document supersedes EN 7361:1995.The main change to the previous version is the editorial revision of the standard.According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bou
20、nd to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portuga
21、l, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.4BS EN 7361:2018EN 736-1:2018 (E)1 ScopeThis European Standard specifies the denominations of valves to provide a uniform and systematic terminology for all types of valves.2 Normative referencesThere a
22、re no normative references in this document.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.o
23、rg/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1valvepiping component which influences the fluid flow by opening, closing or partially obstructing the passage of the fluid flow or by diverting or mixing the fluid flow4 Types of valves related to design4.1 Basic types4.1.1 Gene
24、ralBy reasons of classification of terms, Clause 4 provides definitions related to basic design characteristics.Table 1 shows the basic types of valves.They are distinguished by:a) the type of motion of the obturator;b) the direction of flow towards the seating surface.4.1.2 Gate valveA gate valve i
25、s a valve in which the obturator movement is linear and, towards the seating surface, at right angle to the direction of flow.4.1.3 Globe valveA globe valve is a valve in which the obturator movement is linear and, towards the seating surface, in parallel to the direction of flow.NOTE This definitio
26、n also applies to lift check valves and axial check valves.4.1.4 Plug and ball valveA plug and ball valve is a valve in which the obturator rotates about an axis at right angle to the direction of flow and, in the open position, the flow passes through the obturator.5BS EN 7361:2018EN 736-1:2018 (E)
27、4.1.5 Butterfly valve and eccentric plug valveA butterfly and eccentric plug valve is a valve in which the obturator rotates about an axis at right angle to the direction of flow and, in the open position, the flow passes around the obturator.NOTE This definition also applies to swing check valves.4
28、.1.6 Diaphragm valveA diaphragm valve is a valve in which the fluid flow passage through the valve is changed by deformation of a flexible obturator.NOTE This definition also applies to diaphragm check valves.6 BS EN 7361:2018EN 736-1:2018 (E)Table1 Basic types of valvesOperation oftheobtu-ratorLine
29、armotionRotation about an axis at right angle to the direc-tionofflowDeformationofaflexi-blecomponentDirection of flow towards the seating surfaceAt right angle to the operating motion of the obturatorParallel to the direction of the operating motion of the obturatorThroughtheobturatorAroundtheobtur
30、atorDepends on designSchematic figuresBasictypesGate valve(seeFigure1)Globevalve(seeFigures2, 3 and 4)Plug and ball valve(see Figures5 and 6)Butterfly and eccentric plug valve(see Figures7, 8 and 9)Diaphragm valve(see Figures10 and 11)NOTEdirection of fluid flowoperating motion of the obturator7BS E
31、N 7361:2018EN 736-1:2018 (E)4.2 Examples of basic typesFigures 1 to 11 show typical designs of valves. Details of different body patterns and obturator designs are given in EN 7362.Figure 1 Gate valveFigure 2 Globe valveFigure 3 Lift check valve Figure 4 Axial check valveFigure 5 Plug valve Figure 6
32、 Ball valve8 BS EN 7361:2018EN 736-1:2018 (E)Figure 7 Butterfly valve Figure 8 Eccentric plug valve Figure 9 Swing check valveFigure 10 Diaphragm valve Figure 11 Diaphragm check valve5 Types of valves related to function5.1 GeneralClause 5 defines terms related to the functional characteristics of v
33、alves.5.2 Isolating valveAn isolating valve is a valve intended for use only in the closed or fully open position.5.3 Regulating valveA regulating valve is a valve intended for use in any position between closed and fully open.5.4 Control valveA control valve is a power operated device which changes
34、 the fluid flow rate in process control system. It consists of a valve connected to an actuator with or without positioner that is capable of changing the position of an obturator in the valve in response to a signal from the control system.5.5 Safety valveA safety valve is a valve which automatical
35、ly, without the assistance of any energy other than that of the fluid concerned, discharges a certified quantity of the fluid so as to prevent a predetermined safe pressure being exceeded, and which is designed to reclose and prevent further flow fluid after normal pressure conditions of service hav
36、e been restored.5.6 Bursting disc safety deviceA bursting disc safety device is a nonreclosing pressure relief device actuated by differential pressure and designed to function by the bursting of the bursting disc(s). It is the complete assembly of installed components including, where appropriate,
37、the bursting disc holder.9BS EN 7361:2018EN 736-1:2018 (E)5.7 Check valveA check valve is a valve which automatically opens by fluid flow in a defined direction and which automatically closes to prevent fluid flow in the reverse direction.NOTE Definitions of types of check valves are given in 4.1.3,
38、 4.1.5 and 4.1.6.5.8 Diverting valveA diverting valve is a valve intended to influence the proportion of two or more output flows from a common input flow, by changing the position of the obturator.5.9 Mixing valveA mixing valve is a valve intended to influence the proportion of the two or more inpu
39、t flows to produce a common output flow by changing the position of the obturator.5.10 Automatic steam trapAn automatic steam trap is a selfcontained valve which automatically drains the condensate from a steam containing enclosure whilst remaining tight to live steam or, if necessary, allowing stea
40、m to flow at a predetermined rate.5.11 Bleed valveA bleed valve is a valve equipped, upstream and/or downstream of the obturator, with branch to purge part of the upstream or downstream piping.10 BS EN 7361:2018EN 736-1:2018 (E)BibliographyEN 7362, Valves Terminology Part 2: Definition of components
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