Technical Databook Fire & Smoke Actuators Spring-Return and Non-Spring-Return Version 1 Belimo Asia Pacific 2 Su bje ct to tec hn ic al ch an ge s. Spring-Return 18Nm/12Nm F 11Nm/8.5Nm FG 6Nm/4Nm* LF Angle Rotation max. 95 ° Blank Power Supply AC/DC 24V 24 AC/DC 24...48V 24...48 (only for BR..) AC 230V 230 * Torque of BLF24-SR is 4Nm/4Nm. * FSAF24(-S) US power supply is AC/DC 24V. Fire & Smoke