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1、BRITISH STANDARD BS EN 736-1:1995 Valves Terminology Part 1: Definition of types of valves The European Standard EN 736-1:1995 has the status of a British Standard BS EN 736-1:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under th
2、e authority of the Standards Board and comes into effect on 15 July 1995 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference PSE/7 Draft for comment 92/76141 DC ISBN 0 580 24276 5 Committees responsible for this British Standard The preparation of this B
3、ritish Standard was entrusted to Technical Committee PSE/7, Valves, upon which the following bodies were represented: Amalgamated Engineering Union Association of Bronze and Brass Founders British Chemical Engineering Contractors Association British Foundry Association British Gas plc British Plumbi
4、ng Fittings Manufacturers Association British Valve and Actuator Manufacturers Association British Water Chartered Institution of Building Services Engineers Electricity Association Energy Industries Council Engineering Equipment and Materials Users Association GAMBICA (BEAMA Ltd.) Health and Safety
5、 Executive Institution of Mechanical Engineers LP Gas Association Ministry of Defence Pipe Line Industries Guild Society of British Water Industries Water Services Association of England and Wales West Midlands CBI Coopted members Amendments issued since publication Amd. No.DateComments BS EN 736-1:
6、1995 BSI 07-1999i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 736-1 3 BS EN 736-1:1995 ii BSI 07-1999 National foreword This British Standard has been prepared by Technical Committee PSE/7 and is the English language version of EN 736-1:1995 Val
7、ves Terminology Part 1: Definition of types of valves, published by the European Committee for Standardization (CEN). EN 736-1 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provi
8、sions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title pag
9、e, pages 2 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 736-1 February 1995 ICS 01.040.23; 23.060.00 D
10、escriptors: Valves and fittings, vocabulary, classifications, designations English version Valves Terminology Part 1: Definition of types of valves Appareils de robinetterie Terminologie Partie 1: Dfinition des types dappareil Armaturen Terminologie Teil 1: Definition der Grundbauarten This European
11、 Standard was approved by CEN on 1995-02-01. 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 and bibliographical references concerning
12、 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 responsibility of a CEN member into its own langu
13、age and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and U
14、nited Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 736-1:1995 E EN 736-1:1995 BSI 07-1999 2 Foreword This European Standard
15、 has been prepared by the 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 publication of an identical text or by endorsement, at the latest by August 1995, and conflicting
16、national standards shall be withdrawn at the latest by August 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands,
17、 Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword2 1Scope3 2Normative reference3 3Definition3 4Types of valves related to design3 5Types of valves related to function6 Table 1 Basic types of valves4 EN 736-1:1995 BSI 07-19993 1 Scope This standard gives the denomi
18、nations of valves. It has the purpose to provide a uniform and systematic terminology for all types of valves. By reasons of classification of terms, clause 4 defines terms related to basic design characteristics and clause 5 defines terms related to functional characteristics of valves. 2 Normative
19、 reference This 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 o
20、f these publications 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 736-2, Valves Terminology Part 2: Definition of components of valves. 3 Definition For the purposes of this
21、 standard, the following definition applies: 3.1 valve piping 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 flow 4 Types of valves related to design 4.1 Basic types Table 1 shows the basic type
22、s of valves. They are distinguished by: a) the operating motion of the obturator; b) the direction of flow in the seating area. 4.1.1 Gate valve Valve in which the obturator movement is linear and, in the seating area, at right angle to the direction of flow. 4.1.2 Globe valve Valve in which the obt
23、urator movement is linear and, in the seating area, in the direction of flow. NOTEThis definition also applies to lift check valves and axial check valves. 4.1.3 Plug and ball valves Valve in which the obturator rotates about an axis at right angle to the direction of flow and, in the open position,
24、 the flow passes through the obturator. 4.1.4 Butterfly valve and eccentric plug valve 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. NOTEThis definition also applies to swing check valves. 4
25、.1.5 Diaphragm valve Valve in which the fluid flow passage through the valve is changed by deformation of a flexible obturator. NOTEThis definition also applies to diaphragm check valves. 4.2 Examples of basic types The schematic figures given below show typical designs of valves. Details of differe
26、nt body patterns and obturator designs are given in EN 736-2. 4.2.1 Gate valve EN 736-1:1995 4 BSI 07-1999 Table 1 Basic types of valves Operation of the obturator Linear motionRotation about an axis at right angles to the direction of flow Deformation of a flexible component Direction of flow in th
27、e seating area At right angles to the operating motion of the obturator In the direction of the operating motion of the obturator Through of obturatorAround the obturatorDepends on design Schematic figures Basic typeGate valveGlobe valvePlug and ball valvesButterfly and eccentric plug valves Diaphra
28、gm valve Direction of fluid flow Operating motion of the obturator EN 736-1:1995 BSI 07-19995 4.2.2 Globe valve 4.2.3 Plug and ball valve EN 736-1:1995 6 BSI 07-1999 4.2.4 Butterfly valve and eccentric plug valve4.2.5 Diaphragm valve 5 Types of valves related to function 5.1 Isolating valve Valve in
29、tended for use only in the closed or fully open position. 5.2 Regulating valve Valve intended for use in any position between closed and fully open. 5.3 Control valve A power operated device which changes the fluid flow rate in process control system. It consists of a valve connected to an actuator
30、with or without positioner that is capable of changing the position of an obturator in the valve in response to a signal from the controlling system. EN 736-1:1995 BSI 07-19997 5.4 Safety valve Valve which automatically, without the assistance of any energy other than that of the fluid concerned, di
31、scharges 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 of fluid after normal pressure conditions of service have been restored. 5.5 Bursting disc safety device A non-reclosing pressure relief
32、 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, the bursting disc holder. 5.6 Check valve Valve which automatically opens by fluid flow in a defined direction
33、 and which automatically closes to prevent fluid flow in the reverse direction. NOTEDefinitions of types of check valves are given in clauses 4.1.2, 4.1.4 and 4.1.5. 5.7 Diverting valve Valve intended to influence the proportion of two or more output flows from a common input flow by changing the po
34、sition of the obturator. 5.8 Mixing valve Valve intended to influence the proportion of two or more input flows to produce a common output flow by changing the position of the obturator. 5.9 Automatic steam trap Self-contained valve which automatically drains the condensate from a steam-containing e
35、nclosure whilst remaining tight to live steam or, if necessary, allowing steam to flow at a predetermined rate. BS EN 736-1:1995 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents th
36、e UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to im
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