Actuator, Electric (EVA-1)
The Model EVA-1 is a small, electronically controlled valve actuator developed specifically to fit 1/4…1 in. (6…25 mm) Research Control Valves. Its accurate positioning and compact size make it especially suited to flow control in research and small process
applications.
- Microprocessor-controlled, linear stepper motor
- 4…20 mA analog input
- Position 4…20 mA analog output (optional)
- Choice of 12 speeds
- Up to 40 pounds of stem thrust
- Accurate and repeatable positioning
- Adjustable split range
- Quick and simple zero and span input and output adjustments
- Adjustable stroke range 0.1875…0.5625 in. (4…14 mm)
- User-adjustable direct or reverse action
- RS-232 Serial Port for all adjustments without removing
the cover* - Controlled seating force to prevent inner valve damage
- Built-in temperature compensation
- Stainless steel yoke and rugged epoxy-coated
aluminum housing - 115V AC/12V DC, 230V AC/12V DC, and 24V DC
models available
- Industrial Process: Precise flow control in general industrial systems.
- Research Facilities: Ideal for labs needing accurate, compact positioning control.
- Oil & Gas: Used in flow regulation and control systems.
- Chemical & Petrochemical: Suitable for conductive fluids, acids, and slurry handling.
- Aviation & Aerospace: Integrated into specialized testing and control systems.
- Test Equipment: Supports automated, precise valve operation across various test setups.
- Control Input: 4–20 mA DC
- Power Supply: Standard 115V AC; also available in 230V AC and 24V DC models
- Stroke Length:
- 0.437 in (11 mm) for 1/4″ units
- 0.562 in (14 mm) for 1/2″ to 1″ units
- Adjustable from 0.1875 to 0.5625 in
- Thrust: Up to 40 lb stem thrust
- Position Output: Optional isolated loop-powered 4–20 mA
- Action: User-selectable direct or reverse
- Communication: RS-232 serial port for full adjustment
- Temperature Range: 14–140°F (–10–60°C)
- Certifications: ATEX / Explosion-proof — Class 1, Division 1, Groups C & D
- Construction: Stainless steel yoke with rugged epoxy-coated aluminum housing
- Speed Modes: Dual-speed operation — low speed for seating, high speed for fast response
