AUMA worm gearboxes are used for the operation of part-turn valve butterfly valves and ball valves.

Designed for intermittent duty S4 – 25 % (modulating duty only bronze), and for short-time duty S2 – 15 min (open-close duty)

They can either be operated manually directly by handweel, or operated by motor with an electric mulit-turn actuator.

Gearbox is capable for mounting an actuator flange. The clockwise rotation of the input shaft provides a clockwise rotation of the output drive.

Design features
Torque range up to 675,000 Nm
Reduction ratios from 39:1 to 3328:1
Swing angles up to 190°
With or without primary reduction gearing
360° worm wheel
End stops with travelling nut principle in accordance with AWWA C504
Output drive according to ISO standard
adjustable end stops
All parts within the power drive have been subjected to thermal hardening

Ambient conditions
Enclosure protection IP68
High quality corrosion protection
–60 °C to +120 °C

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

Type : worm
Shaft orientation : right angle
Torque : > 10 kNm
Applications : for valve actuators