The Rotork AB-SS range is a part-turn gearbox with a 316 stainless steel housing, suited for plug, ball and butterfly valves serving the water, gas, chemical and power industries in corrosive environments. Torque goes up to 26,000 Nm (19,177 lbf.ft).
| Type | Part-turn worm gear operator (manual drive) |
| Material | 316 stainless steel housing, input shaft and fasteners |
| Torque Range | Up to 26,000 Nm (19,177 lbf.ft) |
| Ratios | 34:1 to 729:1 |
| Valve Types | Plug, ball and butterfly valves (water, gas, chemical and power industries, corrosive environments) |
| Features | Worm gear / manual drive |