AUMA worm gearboxes are used for the operation of part-turn valves  (e.g. butterfly valves, ball valves).

• Type of duty:
  Short-time duty S2 - 15 min (Open-close duty)
  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)
• Gearbox is prepared for mounting an actuator flange
• Clockwise rotation at the input shaft results in clockwise rotation at the output drive  

Design features:

• Torques up to 675,000 Nm
• Reduction ratios from  39:1 to 3328:1
• Swing angles up to 100°
• Adjustable end stops (option)
• Output drive according to ISO standard

Ambient conditions:

• High enclosure protection
• High quality corrosion protection
• Wide ambient temperature range 

Options:

• Swing angle > 100 ° or multi-turn (without end stops)
• Worm wheel made of bronze for modulating applications
• Clockwise rotation at the input shaft results in counterclockwise rotation at the output drive

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