BS EN 558: 201 7

Industrial valves Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems PN and Class designated valves.

BS EN 558 Standard specifies the “face-to-face” (FTF) and “centre-to-face” (CTF) dimensions for PN

and Class designated metal valves used in flanged pipe systems.

 

This European Standard covers valves with the fo llowing PN , Class and DN values:

PN 2 , 5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160; PN 250; PN 320; PN 400;

Class 125; Class 150 ; Class 250; Class 300; Class 600 ; Class 900; Class 1 500; Class 2 500;

DN 150;

DN 800 ;

DN 125;

DN 750;

DN 10; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100;

DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700;

DN 900; DN 1 000; DN 1050; DN 1 200; DN 1 400; DN 1600 ; DN 1 800; DN 2000.

For valves in other shell materials than metal the same FTF and CTF dimensions may be used.

For relationship between DN and NPS see Annex B.

 

Normative references

The fo llowing documents , in whole or in p art , are normatively referenced in this document and are indispensable for its application. For dated references , only the edition cited applies. For undated references , the latest edition of the referenced document (including any amendments) applies.

EN 736- 1, – valves-Terminology – Part 1: Definition of types of valves

 

Terms and definitions

For the purposes of this document , the terms and definitions given in EN 736-1 and the following apply.

 

3.1 face-to-face dimensions

Straight pattern valves

distance between the two planes perpendicular to the valve axis located at the extremities of the bodyend po rt s or as specified in the relevant valve product standard

 

3.2 centre-to-face dimensions

Angle valves

distance , between the plane located at the extremity of eith er body end port and perpendicular to its axis and the axis of the other body end port.

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