Fisher 585C Piston Actuator
Fisher 585C piston actuators provide low to medium thrust output for a variety of small to medium Fisher sliding-stem valves, including the easy-e™, HP, EH, and 461 valves. The double-acting design of the actuator results in stiff, precise positioning. Smaller sizes of this actuator are also available with optional bias springs for a spring return fail mode.
The Fisher 585C Piston Actuator is a heavy-duty pneumatic actuator engineered to deliver high thrust and precise control for linear valve applications in demanding industrial environments. Manufactured by Emerson, the 585C is designed to operate gate, globe, and other linear motion valves that require reliable and powerful actuation for both on/off and modulating control services. This actuator uses a piston-cylinder mechanism that converts air pressure into linear motion, providing exceptional thrust output with smooth and responsive performance. Its double-acting design allows for positive control in both directions of travel, while an optional spring-return configuration offers fail-safe positioning during air supply failure. Built with rugged carbon steel construction and precision-machined components, the Fisher 585C ensures durability, corrosion resistance, and long operational life even in severe process conditions. It is fully compatible with Fisher control valves and digital valve controllers (such as DVC positioners), allowing for integrated performance and precise valve positioning across a wide range of pressures and flow conditions. The actuator’s modular design, ease of maintenance, and ability to handle high-pressure pneumatic signals make it an industry standard for process control reliability and efficiency.
Technical Specification of Fisher 585C Piston Actuator
- Actuation
- Double-acting, Spring-return, Linear
- Certifications
- PED, CUTR, ATEX
- Control Type
- On/Off, Throttling, Positioning
- Operating Temperature
- Standard Temperature
- Power Source
- Pneumatic
- Process Control
- On/Off, Throttling, Positioning
- Valve Type
- Angle Valve, Globe Valve
- Other Configurations
- Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.
Feature of Fisher 585C Piston Actuator
- Maximum thrusts of up to 111 kN (25,000 lbf) can be produced, depending on construction.
- Depending on size, strokes of up to 203 mm (8 in) are available.
- Universal NAMUR mounting provides a consistent mounting method and also provides vibration resistance per ISA-S75.13.
- The double-acting construction allows stiff, precise positioning.
- 585C size 25 and 50 actuators are available with a top-mounted handwheel. All other 585C actuator sizes can accommodate a side-mounted handwheel.
- Actuator sizes 25 and 50 are available with bias springs. A bias spring under the piston fully retracts the actuator stem upon loss of supply air, while a bias spring on top of the piston fully extends the actuator stem.
- Low friction piston seals and cylinder coatings reduce sliding friction and wear.