DIAPHRAGM VALVES: FLOPORT DIAPHRAGM VALVES are in weir type Design, Material of constructions are in CAST IRON ( IS 210 Gr FG.260 ) LINED UNLINED, . Sizes range from 1" -to- 4" (25mm - 100mm). Manufacturing Standards as per BS 5156. Valves End Connections are available in Flanged as per BS 10 Table "D", "E" ANSI B