Gearboxes GS for operation of part-turn valves and special valves
○ Type of duty: Short-time duty S2 – 15 min (Open-close duty) and inching/positioning
○ Intermittent duty S4 – 25 % (Modulating duty only bronze).
○ They can either be operated in:
– manual operation directly via handwheel
– motor operation (electric multi-turn actuator)
○ Swing angle 0° to 190° or multi-turn without endstop.