Fisher Control-Disk Valve Pocket Guide ® ™ www.Fisher.
Fisher Control-Disk™ Valve ® The Fisher Control-Disk™ rotary valve with 2052 spring-and-diaphragm actuator can effectively replace poorly performing butterfly control valves and provide a more compact, competitive alternative to segmented ball valves.
Stay on Set Point and Save Money Improved throttling control range from 15 % to 70% opening – equal percentage flow characteristic. Control closer to ideal set point with faster response time, less chance of set point overshoot. Eliminates the need to de-tune your loop or revert to manual control at lower travels. The new Control-Disk valve also reduces operating torque.
Rugged Reliability and Exceptional Shutoff for Long Product Life From seals to bearings, springs to diaphragms, every Fisher rotary control product is designed to improve product life. They are tested to a minimum of 25,000 cycles -- Hot air to 385°C (725°F), high-pressure water to 51 bar (740 psig), and steam at 28 bar (400 psig) and 371°C ( 700°F) Mechanical tests determine the effects of cycle life, fatigue, vibration, galling, wear and corrosion.
Higher Profits through Reduced Process Variability Lost motion, friction, and positioner response cause variability. Typical Poorly Performing Valve Elimination of lost motion and backlash is enabled by: Clamped spline connection High-quality actuator rod-end bearing A “best in industry” pin connection of shaft and disk. In addition, pin system makes maintenance easy.
Higher Profits through Reduced Process Variability Low friction through the use of: PTFE-lined PEEK bearings Premium bushings for the actuator lever Available with the Fisher FIELDVUE DVC2000 or DVC6020 digital valve controllers.
Longer Product Life; Lower Maintenance Costs For maximum reliability, valve and actuator are designed for one million full-stroke cycles under load conditions. PTFE-lined PEEK bearings offer low friction, long life. Shaft pinning system ensures a tight connection and easy disassembly and reassembly for maintenance. Design of actuator ensures long life and easy maintenance. No special tools needed. Powder paint finish offers an excellent corrosion-resistant finish to all steel parts.
Adherence to Global Standards is Easy The valve meets API, ASME, and EN standards, making it suitable for use in all world areas. The optional ENVIRO-SEAL ® packing systems offer exceptional shaft sealing capabilities. Live-loading provides improved sealing, guiding, and loading force transmission. ISO actuator mounting and NAMUR accessories mounting. Available in constructions that comply with NACE MR0103 and MR0175 / ISO 15156.
Easy Selection and Flexible Installation Actuator sizing is taken care of for you. Simply select the valve size and pressure drop—only 3 actuator sizes. Torque values are available for sizing. Mount the valve in either horizontal or vertical position. Disk is always centered— spring-loaded shaft-disk Actuator can be right-or left-hand mounted Line centering clips for easy alignment during installation. One body for either PTFE or metal seal.
Performance Proven in Field Tests Two troublesome valves on a paper machine were replaced with Control-Disk valves. Existing valves could not be put into automatic operation. Existing valves had gains greater than 4.0 with process variability of 3.5% for one and 8.0% for the other. Replacement Control-Disk valves were installed and put on automatic control. Variability was reduced from 8.0% to 3.0% for one valve and from 3.5% to 1.6 % for the other.
Selections
Pressure Drops Maximum shutoff pressure drops for the PTFE seal and PEEK/PTFE bearings are shown here.
Associated Products Fisher 8580 Valve with 2052 Spring-and-Diaphragm Actuator ® For traditional high-performance butterfly valve control applications, consider the 8580 valve. It is available in the same sizes, ratings, and materials as the Control-Disk valve.
Associated Products POSI-SEAL A81 Valve with FieldQ™ Rack-and-Pinion Actuator ® For automated on-off applications, consider the A81 valve with the FieldQ rack-and-pinion actuator. The actuator is an innovative, modular design; small and compact. It is available in double-acting and spring-return models. The actuator uses solenoid valves to switch operating pressure on and off. The valve is available in the same sizes, ratings, and materials as the Control-Disk valve.
Associated Products Fisher 2052 Spring-and-Diaphragm Actuator The same 2052 pneumatic actuator available on the Control-Disk valve is available as a stand-alone product or on traditional Fisher rotary valves. With its ISO 5211 mounting- hole pattern, it can be added to other control valves to improve performance. Provides the same rugged reliability and long life as it does when coupled with the Control-Disk valve. Fisher Vee-Ball® Valve with 2052 Actuator and DVC2000 Controller.
© Fisher Controls International LLC 2008 All Rights Reserved Fisher, Control-Disk, FIELDVUE, EVNIRO-SEAL, and Vee-Ball are marks owned by one of the companies in the Emerson Process Management, LLLP business division of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
