Rotary actuator with fail-safe function NRF for two-way and three-way ball valves by Belimo. It can be used for both open/close versions and regulating versions of ball valves. The actuator is controlled by a DC 0-10V control signal.

Actuator version NC - closed when de-energized.

The actuator is exclusively compatible with Belimo ball valves. It cannot be used on valves from other manufacturers!

Features

• The actuator drives the ball valve while simultaneously tensioning the return spring to the operating position. Interrupting the power supply turns the ball valve back to the fail-safe position using the spring's energy.
• Simple direct mounting on the ball valve using a single screw. No additional adapter is required for installation. The mounting position is selectable in 90° increments relative to the ball valve.
• The ball valve can be adjusted and fixed in any position using a manual lever. Unlocking is done manually or automatically by supplying power.
• The actuator is protected against overload, requires no end stops, and automatically stops at the end stop.