RS Components
Our website uses cookies and similar technologies to provide you with a better service while searching or placing an order, for analytical purposes and to personalise our advertising to you.

Open/Close Damper Actuator, 20Nm, 24 V ac/dc

Discontinued product
RS Stock No.:
Mfr. Part No.:
COO (Country of Origin):

SF Series Spring Return with Emergency Function

New SF Series spring return actuators with emergency function for adjusting air dampers in ventilation and air conditioning systems in buildings. These replace the current AF series.,The motor moves the damper to its normal operating position against spring tension with a powerful turning and holding torque of 20 Nm. The spring will then return the damper to its safe position should the power supply be interrupted.

Brushless motors ensure a service life of 60000 operations
Can be installed with pre-tensioned spring
Manual winding and integral position fixing options allow installation and functional monitoring without electrical connection
Adjustable U-clamp accepts round or square shafts; round sizes 10 to 25.4 mm and square shafts 10 to 18 mm across flats, and 14 to 25.4 mm diagonal
Direction selector
IP54 rated
150 second motor run time
1 metre pre-wired cable
Stock nos. 712-2668 & 712-2652 feature an integrated 2xSPDT 6 (3)A 250Vac auxiliary switch


cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02 Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14

Return TypeSpring Return
Maximum Damper Area4m²
Damper Spindle Compatibility10 → 25.4mm
Switch IncludedYes
Power Consumption5W
Control TypeOpen/Close
Supply Voltage24 V ac/dc
Motor Torque20Nm
Return Torque20Nm
Noise Level45dB(A)
Maximum Damper Spindle Size25.4mm
Minimum Damper Spindle Size10mm