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Fail-safe actuator Belimo EF 24A-SR. Designed for air dampers, ball valves. Power supply 24V, torque 30Nm, 0-10V signal control. More information
GLS delivery 3-4 working days. DHL express delivery 1-2 working days.
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Adjustment time | 20 s (em. function), 150 s |
Auxiliary contact | No |
Control | 0...10 V |
Emergency functions | Yes |
Flap size | 6 m2 |
Power | 24 VAC, 24 VAC |
Torque | 30 Nm |
Weight | 4.30 kg |
Datasheet download
Download PDFBelimo EF series actuator with fail-safe for ball valves (eg. Giacomini R250D with adapter ). The actuator is designed for damper size up to approx. 6m2. The actuator control is 2-10V.
In the event of a power failure, the return spring begins to rotate the actuator to the starting position. Eg. closes the damper or ball valve in the event of a power failure. The same can be done upside down, depending only on the initial position of the valve.
By using the hand crank the valve can be operated manually and egaged with the locking switch at any position.
The spindle clamp of the spring-return actuator is factory-equipped with an axis stabiliser for the stabilisation of the combination of damper, damper spindle and actuator. This is comprised of two plastic support rings and must be left in place, partially or completely removed, depending on the installation situation and the axis diameter.
In case of mounting long shaft with diameter 12-20mm it is necessary to use stabilizer. A shaft diameter of 21-26.7mm does not require a stabilizer.
In case of short shaft mounting, the stabilizer can be removed.
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