The Air Torque AT251U is a rack-and-pinion pneumatic quarter-turn actuator for automating butterfly, ball and other quarter-turn valves in water, petrochemical and industrial manufacturing applications. The AT251U designation corresponds to Air Torque catalogue size DR/SC00100U and can be configured as double acting DR/DL or single acting spring return SC/SO. Confirm the full factory order code, operating mode, spring set, fail direction, protection version, flange, output square and certification before quotation.
The Air Torque AT251U is a rack-and-pinion pneumatic quarter-turn actuator corresponding to catalogue size DR/SC00100U. It is designed for automating butterfly, ball and other quarter-turn valves used in water treatment, petrochemical plants and industrial manufacturing systems.
AT251U may be supplied as a double-acting DR/DL actuator or as a single-acting spring-return SC/SO actuator. It has a maximum supply pressure of 8 bar, G1/8 pressure ports and a standard F05+F07 ISO 5211 mounting flange. Published double-acting torque is 73.2 Nm at 4 bar, 91.5 Nm at 5 bar, 101 Nm at 5.5 bar and 110 Nm at 6 bar.
AT251U is a size designation rather than a complete factory order code. Confirm the operating mode, spring set, fail direction, protection version, mounting flange, output square, temperature execution, hazardous-area certification and installed accessories before quotation or replacement.