Linear electric actuators type EL20, EL45, EL80, EL120, EL250

DESCRIPTION

Electric linear actuators EL series for modulating and open-close duty of control and process technology to operate control valves. The self-locking stem/stem nut is driven by an electric motor via a gearing. Load and limit switches define the stops for the end positions.

 MAIN FEATURES

- Valve protection against excessive force due to load-dependent seating.

- Comfortable manual operation when disengaging the actuator motor.

- Mounting to valve made via yoke or mounting flange DIN 3358. The design enables easy connection to all types of valves. Standard version is suitable for Adcatrol valves.

- Generating a defined closing force in the end position leads to constantly tight shut-off of the valve.

- A robust metal cover protects efficiently against external contamination and manipulation.

- The actuators are in enclosure protection IP 65 (EL12 IP43) and are designed for rugged industrial use.

- Stall proof synchronous motors (or brake motors for higher positioning forces) ensure highest positioning accuracy.

- Mechanical stroke indication via anti-rotation bar.

- Exact, backlash-free measurement of actual valve stroke by direct coupling to the valve stem.

- Universally usable actuators due to control via 3-point-step controllers, analogue input signals (0…10 V, 0 (4)…20 mA), or fieldbus systems.

- Easy supplement to actuator with optional devices due to modular design.

- Limit switches, easily adjustable, for stroke limitation (not necessary for Adcatrol valves) or as signal for intermediate positions.

- Integrated, adjustable stroke setting to nominal stroke over the complete stroke range (without exchanging pinions, …).

-Actuators with 230V (50Hz) and 220V (60Hz), have a tolerance of more or less 10%.