• Equal percentage flow characteristic— An equal percentage flow characteristic provides an improved throttling range comparable to that of a segmented ball valve. This improved capability allows you to control closer to the target set point, regardless of process disturbances, which results in a reduction in process variability.
• Global Standards— The valve meets API, ASME, and EN standards, making it suitable for use in all world areas.
• PEEK/PTFE bearing as standard— The PTFE-lined PEEK bearing is a patented low friction, low wear bearing. It allows the valve to operate under high pressure drops for a high cycle life while maintaining low torque. The “drop-in” bearing design enables fast, easy maintenance.
• Lower Operating Torques— The equal percentage disk reduces operating torque at peak angles of disk opening.
• Spline-ended Shaft— The splined shaft with clamped lever and single-pivot linkage reduces lost motion between the actuator and the valve shaft.
• Improved shaft-disk pinning— The improved expansion pin system ensures there is a positive, durable connection between disk and shaft. This connection reduces backlash and wear in the drive system, optimizing long-term performance. It also makes disassembly for maintenance quick and simple with no need for special tools.
• New Spring-Loaded Shaft— The spring in the outboard shaft provides support to the drive train and disk, enabling the shaft to be installed in both horizontal and vertical orientations with no detriment to performance or cycle life. This complements the ability to mount the actuator on the left- or right-hand side, enabling access for any installation.
• Excellent Emissions Capabilities— The optional ENVIRO-SEAL® packing systems, are designed with very smooth shaft surfaces and live-loading to provide improved sealing, guiding, and loading force transmission. The seal of the ENVIRO-SEAL system can control emissions to below 100 ppm (parts per million).
• Sour Service Capability— Trim and bolting materials are available for applications involving sour liquids and gases. These constructions comply with NACE MR0175-2002, MR0103, and MR0175 / ISO 15156.
• Field-Reversible Valve Action— The actuator/valve assembly action can be converted from push-down-to-open to push-down-to-close, or vice versa, without additional parts.
• Easy Installation— Line-centering clips engage the line flange bolts to simplify installation and provide for centering of wafer-style valves in the pipeline. End connections are compatible with EN and ASME standards.
• Excellent Shutoff Regardless of Pressure Drop— Both the S31600 (316 stainless steel) seal ring and bidirectional PTFE seal ring with pressure-assisting sealing action ensure shutoff regardless of flow direction.
• Long Seal Life— The opening and closing path of the eccentric disk minimizes disk contact with the seal ring, thereby reducing seal wear, undue friction, and seating torque requirements. See figure 3.
• Reliable Flange Gasketing Surface— The seal retainer screws and retention clips are outside the gasket surface of the seal retainer. Spiral-wound or flat-sheet gaskets can be installed between the uninterrupted seal retainer face and the pipeline flange.
• Integral Shaft-to-Valve Body Bonding— Standard valve construction includes conductive packing to provide electrical bonding for hazardous area applications.
• Powder paint as standard— The Emerson Process ManagementTM powder paint finish offers an excellent corrosion-resistant finish to all steel parts.
• High Temperature Capability— The valve will operate at elevated temperatures, with the appropriate trim components.
• Shaft Retention— Redundant shaft retention provides added protection. The packing follower, anti-blowout ring, and shaft groove interact to hold the shaft securely in the valve body (see figure 2).
• Travel Indication— Additional travel indication can be achieved by using the indication line on the shaft, along with the disk position markings on the packing follower (see figure 5).

• Compact design, smaller actuators— Ensures reduced valve/actuator envelope dimensions leading to greater mounting versatility for both skids and smaller process plants, where space is at a premium.
• Compatible with DVC2000 and DVC6000 digital valve controllers and Fisher 3620 positioner— The new actuator allows linkage-less feedback, via a contact-less magnetic array, from the lever to the end-mounted DVC2000. The DVC6000 and 3620 are side-mounted, with feedback through the cam and feedback arm.
• Clamped lever to reduce lost motion— The clamped lever coupled with the single-pivot linkage and splined-shaft valve reduce lost motion between the actuator and the valve. The typical cumulative deadband for a Fisher rotary control valve assembly results in 0.5% or less variability.
• No bench set required— The new nested spring design requires no bench set. This also simplifies the actuator selection process, see table 13.
• ISO 5211 mounting with optional insert— The actuator can now be mounted directly onto non-spline shafts, such as Square and Double D. This allows the actuator, with its enhanced control, to mount on a wider range of valves.
• Adjustable travel stops standard with optional lockout feature— Provides the ability to adjust or change the travel range without removing the actuator or the addition of extra parts. The optional lockout feature locks the lever in the spring-fail position.
• Fail-safe mechanism contains no aluminum— All steel parts in this mechanism helps to ensure the actuator maintains integrity in the event of a fire.
• Powder paint as standard— The Emerson Process Management powder paint finish offers an excellent corrosion-resistant finish to all external steel parts.
• NAMUR VDE/VDI 3845 for accessory mounting— Meeting the Global standard ensures compatibility for most accessories, enabling quick and easy mounting.
• Field reversible, right- or left-hand mounting— The actuator/valve assembly action can be converted from push-down-to-open to push-down-to-close, or vice-versa, without additional parts.
• Declutchable and top-mounted handwheels— Available (except top-mounted not available for size 3 actuator).

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end user.