Series CA, high pressure valves The serie CA distinguishes itself from the standard 3 piece ball valves with its monobloc body. The end pieces are bolted against the valve body, allowing generally higher working pressures up to PN 200. The available size range is from DN 8 to DN 50. Full and reduced bore versions, with ISO top flange are available. CA valves are offered with butt weld, double flanged , threaded and socket weld end connections.