Keystone F89 Pneumatic Quarter-Turn Actuator
The Keystone F89 is a pneumatic quarter-turn actuator for general purpose and hazardous area applications. The F89 is designed for simple, safe use and ultimate realiability, meeting EN15714-3 requirements and has been validated to 500,000 cycles under specified conditions
The Keystone™ F89 Pneumatic Quarter-Turn Actuator, engineered by Emerson, is a reliable, compact, and high-performance actuator designed to deliver precise rotary motion for quarter-turn valve applications such as butterfly, ball, and plug valves. Built for durability, efficiency, and low maintenance, the F89 actuator ensures dependable valve automation in demanding industrial environments. Featuring a double-acting or spring-return configuration, the F89 actuator provides smooth, consistent torque output throughout the entire stroke. Its rugged anodized aluminum housing offers superior resistance to corrosion and mechanical stress, making it suitable for both onshore and offshore installations, as well as chemical, petrochemical, and water treatment applications. The actuator’s modular design simplifies installation, customization, and maintenance, while the ISO 5211 mounting interface ensures easy integration with a wide range of valves and accessories. Combined with Keystone’s reputation for quality and Emerson’s global engineering support, the F89 actuator delivers long-term reliability, operational safety, and performance precision.
Feature of Keystone F89 Pneumatic Quarter-Turn Actuator
- 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.
- Optimized product flow with standard mounted travel stops for valve position adjustment in open and close position (+/- 5� at each end).
- Anodized aluminum body with electrostatic powder coating (ESPC) finish provides durable protection against corrosive environments.
- Double acting and spring return versions available for cost effective and safe operation.
- Up to 12 individual springs offer flexible torque range for both ball as butterfly valves.
- Pre-compressed spring design and anti-blowout drive pinion means safe maintenance and operation.
Technical Specification of Keystone F89 Pneumatic Quarter-Turn Actuator
- Supply pressure
- Up to 8.3 bar
- Temperature
- `-40°C to 150°C
- Type
- Quarter-Turn