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Butterfly valves, with EPDM sealing membrane against air bubbles, cast iron body, suitable for assembly between two ISO 7005 flanges, also for PN6 and PN10. DN=80 [mm]. Servo motor: SQL35/85. DELTApmax=1.600. Kvs=420 [m3/h]. They are suitable for hot water, cold water maximum 50% glycol, air, in open and closed circuits. They can be used with servocontrols of the series: SQL35..., SQL85..,SQL36... Rotation angle: 90°. Fluid temperature: -15...120 °C. Feature: linear. Valve body: Cast iron GG25. Stem, lens: CrNi steel