Part-Turn Gearboxes
Part-turn gearboxes can be applied wherever a 90° swivel movement is required for the operation of an obturator. GS part-turn gearboxes combined with SA multi-turn actuators act as part-turn actuators. Consequently, nominal torques up to 675,000 Nm can be achieved. These combinations complement the SQ type range for part-turn valves.
GS are suitable for open-close and modulating duty. Both swing angle > 90° as well as multi-turn applications are possible.
GQB gearboxes are suitable for applications requiring a simple, cost-efficient gearbox. GQB are exclusively designed for open-close duty and positioning mode. The swing angle is limited to a maximum of 90°. GHE part-turn gearboxes are used for manual operation of part-turn valves on ships.
If due to a lack of space, valves such as butterfly valves can only be operated via a lever arrangement.
Gearboxes GHE for manually operated valves seldom operated
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Despite high levels of automation there are still valves that are manually operated. This is especially the case when the corresponding valve must only be opened or closed very seldom.
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The range GHE with bronze housing is ideally suited to the operation of part-turn valves (butterfly valves and ball valves) which are preferably used in ship-building.
Gearboxes GQB for use with part turn valves
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Type of duty: Short-time duty S2 – 15 min (open-close duty)
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Operation modes:
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Manual operation directly with handwheel
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Motor operation (by electric multi-turn actuator
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Gearboxes are always provided with an input mounting flange.
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Clockwise rotation at input shaft results in clockwise rotation at output drive.
Gearboxes GS for operation of part-turn valves and special valves
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Type of duty: Short-time duty S2 – 15 min (Open-close duty) and inching/positioning
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Intermittent duty S4 – 25 % (Modulating duty only bronze).
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They can either be operated in:
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manual operation directly via handwheel
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motor operation (electric multi-turn actuator)
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Swing angle 0° to 190° or multi-turn without endstop.
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If due to a lack of space, valves such as butterfly valves can only be operated via a lever arrangement.
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For higher torque requirements, the multi-turn actuators SA can be combined with a part-turn gearbox with base and lever. The gearboxes are based on the worm gearboxes GS, which can be converted by mounting base and lever. Since this can also be done afterwards, this results in considerable advantages in stock-keeping.
