BS EN 558-2017 pdf free download.Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems — PN and Class designated valves
This European 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 following 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 10; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150;
DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750; DN 800;
DN 900; DN 1 000; DN 1050; DN 1 200; DN 1 400; DN 1 600; DN 1 800; DN 2 000.
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.
2 Normative references
The following documents, in whole or in part, 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
3 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
(FTF) [straight pattern valves]
distance between the two planes perpendicular to the valve axis located at the extremities of the body end ports or as specified in the relevant valve product standard
Note 1 to entry: See Figures 1 to 4.
Note 2 to entry: In millimetres.
3.2 centre-to-face dimensions
(CTF) [angle pattern valves]
distance, between the plane located at the extremity of either body end port and perpendicular to itsaxis and the axis of the other body end port
Note 1 to entry: See Figures 1 to 4.
Note 2 to entry: In millimetres.
4 Dimensions and tolerances
4.1 Basic series
The basic series of FTF and CTF dimensions shall be as given in Table 2.
4.2 Face-to-face and centre-to-face dimensions
4.2.1 General
The FTF and CTF dimensions shall be in accordance with Figures 1 to 4 and Table 2.
For each type of valve, the basic series to be taken into consideration are given in Table 5 to Table 16.
NOTE 1 Table 2 gives complete series. In Table 5 to Table 16, the columns of series may be incomplete.
NOTE 2 For certain sizes/types of valves, alternative dimensions are permitted and these are specified in Table 5 to Table 16 as appropriate.
NOTE 3 The origin of the basic series is shown in Annex A (informative).
4.2.2 Class designated valves with ring joint flanges
For Class designated valves with ring joint flanges, the FTF or CTF dimensions given in Table 2 shall be increased by x as defined in Table 1 and Figure 5.BS EN 558 pdf download.