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Product Description
Fisher 685 series piston actuators provide medium to high thrust output for a variety of medium to very large Fisher sliding-stem valves, including the easy-e™, HP, EH, FB, and 461 valves. The double-acting design of the actuator results in stiff, precise positioning. Spring-return constructions are also available and offer a fail open or closed mode of operation when paired with a valve.
Specifications
| Specifications | Details |
|---|---|
| Actuation | Double-acting, Spring-return, Linear |
| Certifications | PED, CUTR, ATEX, SIL capable |
| Control Type | 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. |
Features
- Maximum thrusts of up to 354 kN (79,000 lbf) can be produced, depending on construction.
- Depending on size, strokes of up to 610 mm (24 in) are available.
- The double-acting construction allows for stiff, precise positioning.
- A side-mounted handwheel is available for all sizes except the size 28, which uses a hydraulic hand pump for manual override control.
- Internal bias spring constructions are available for applications requiring a mechanical fail mode.
- Low friction piston seals and cylinder coatings reduce sliding friction and wear.
The Fisher 685 Series Piston Actuators from JCSCMRO deliver reliable performance for industrial valve control, combining robust construction with precise positioning to ensure long-term durability in demanding applications. While maintaining competitive pricing, we streamline logistics to offer faster delivery than industry averages, reducing downtime for your operations. Our team provides responsive after-sales support, including technical guidance and spare parts availability, because we understand that your productivity depends on seamless equipment performance.
