... ISO9001 Ductile Iron Gate Valve Specification:1. Size: 1-1/2”-24” (DN40-DN600)2. Design Standard: BS5163, AWWA C509/C515, DIN3202 F4 ... /F5, MSS SP-70.3. End Flange Connection: ANSI B 16.1, BS EN 1092(PN10, PN16), DIN 2501(PN10, PN16 ... ), BS 10 Table E4. Disc: Grey iron, Ductile iron, with or without EPDM5. Seat ...