Third Series: servo-assisted, NC (normally closed), nominal diameter from 15 and up to 50mm. With flow regulator. Suitable for use with drinking water. Also available in the NO (normally open) and bistable version. With manual valve opening and closing control and removable coil by means of a self-locking yellow ring nut. For use in medium-large irrigation systems, agricultural land, sports facilities but also gardens, greenhouses and nurseries.