Valves, Actuators and Positioners

Sept. 18, 2009
The latest in valve technology.
WATER VALVEGF Piping Systems800/854-4090Type 563 Aqua butterfly valve is designed specifically for water applications. With its low-cost PVC material and EPDM seal, this new specialty valve is priced to provide a very economical product for non-chemical water applications. Suitable industrial uses include water processing and filtration systems. The valve is available in sizes from 2 to 12 in. with either a lockable hand lever or with a gear-operated wheel.
BRUSHLESS SERVO ACTUATORExlar Corporation952/368-3434Tritex II Series electric actuators offer 1500 Watt AC powered operation and digital position control in one space-saving housing. These actuators combine a brushless servomotor with either rotary or linear output actuation. With their built-in mechanical converters, Tritex II actuators eliminate the need for traditional ball screw or gear reducer mechanisms. The actuators operate from 100 VAC to 240 VAC, allowing direct connection to factory power sources.
VALVE WIDE SHUTEmerson Process Management314/553-2000Posi-Seal A81 rotary valve features tight shut-off and long seal life capability, making it ideal for on/off applications. Complete shut-off is made possible by the pressure-assisting action of the valve seal ring. The opening and closing path of the eccentric valve disk minimizes contact with the seal ring, reducing seal wear. Interchangeable sealing technology allows the A81 valve body to accept both soft and metal seals.
FAIL-FREEZE POSITIONERValve Accessories & Controls205/678-0507 VAC D400 digital positioner is available  with a fail-freeze operation option. This means that, on loss of signal, the unit will freeze the actuator/valve/damper in the last known input signal. Normal positioner operation would be for the positioner to return to its zero position on loss of signal, probably driving the valve/damper open or closed. HART, Foundation fieldbus and Profibus communications protocols are supported.
BLUETOOTH VALVEFlowserve972/443-6500      Limitorque MX and QX valve actuators along with MX/QX dashboard software allow wireless communication via Bluetooth. Limitorque QX is a quarter-turn, smart, electronic valve actuator. It uses brushless DC motors to eliminate sparks, reduce mechanical and electrical noise, and dissipate heat better than DC motors with brushes. Unique to the quarter-turn industry, a brushless-actuator design lasts longer than conventional motors and allows for more accurate positioning.ELECTROMECHANICAL ACTUATORS
Thomson, A Danaher Motion Company
ElecTrak Pro linear actuators are a zero-maintenance electromechanical solution. Unlike hydraulic and pneumatic alternatives, the actuators provide quick and simple installation and tuning, and require no ongoing maintenance. The actuators feature a compact design and short retracted length, coupled with a lightweight and high strength IP66 housing. IP67 protection is available as an option. The built-in microprocessor provides Electronic Load Monitoring to ensure long actuator life and maximum reliability. HIGH-SPEED ACTUATOR
The EGC electric actuator is designed for high dynamic speeds and high rigidity. This modular actuator can be used as an individual component adapted to third-party motors or as a complete system provided by Festo. The actuator is available with a toothed belt, or with a ball screw in a variety of screw pitches. Ball screw sizes are 70, 80, 120 and 185. Toothed belt sizes are 50, 70, 80, 120 and 185.