Our Products Product Groups HYDRAULIC VALVES HYD tilt, installation of all lift valves and safety valves, heavy, medium-heavy and medium-light applications also include electric valves, lightly loaded dampers and air valves. HYDRAULIC DIRECTION AND T... HYDRAULIC DIRECTION AND T... HV3 OPEN CIRCULATED VENT... HV3 OPEN CIRCULATED VENT... CLOSED CIRCUIT VOLUME CLOSED CIRCUIT VOLUME MECHANICAL VENTILATION MECHANICAL VENTILATION