This standard specifies general requirements for cast iron gate valves: - for all fluids and all places of installations;-with flanged,socket orspigot ends; Isobaric from Pn6 to PN 25;Isomorphic from PN1 to PN10. The range of nominal sizes covered is: DN40;DN50;DN65;DN80;DN100;DN125;DN150;DN 200;DN250;DN300;DN350;DN400;DN450;DN500;DN600;DN700;DN750;DN800;DN900; DN1000. For particular applications, some specific or alternative requirements and/or a amendments can be specified by the releva nt performance standards.
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