The GQB series of part-turn gearboxes extends the gearbox portfolio of electric actuator manufacturer Auma. Engineered and manufactured in Germany, they have been specifically designed to meet the requirements for basic 90° applications with standard industrial valves such as butterfly and ball valves.
All components within the power drive, like the worm wheel and worm shaft, are surface hardened to further increase wear resistance. In addition, all housing parts are powder-coated using the corrosion-resistant two-layer powder coating system.
The housing incorporates a coaxial primary reduction gear as well as integral mounting flanges for the actuator, handwheel and valve. End stops to limit the valve travel are easily accessible next to the output drive shaft. An overload protection guarantees safety in case of excessive torque. The GQB gearboxes are currently available in three sizes – GQB 160.1, GQB 200.1 and GQB 250.1 – covering torques up to 84 000 Nm.
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