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KEYSTONE F89 PNEUMATIC QUARTER-TURN ACTUATOR …
www.emerson.com2 4 (B) 2 (A) 4 (B) 2 (A) 4 (B) 2 (A) 4 (B) 2 (A) KEYSTONE F89 PNEUMATIC QUARTER-TURN ACTUATOR GENERAL PURPOSE / HAZARDOUS AREA PRINCIPLE OF OPERATION Both the double acting and spring return actuators feature a compact design each with their