General Application: Compact, reliable and low operation costs for all types of quarter-turn valves are the keywords of the Keystone F89 range of pneumatic actuators.

Direct mounting to all Keystone butterfly valves and ball valves. Valve connection compatible with Keystone (imperial and metric) and ISO 5211. Double Rack and Pinion design nullifies side loads on the pinion shaft, minimizing bearing wear and extending life.