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Belimo FSTF24-S US 24V Fire and Smoke Damper Actuator, 18 in-lb, Spring Return, 2 SPST Switches
- Regular price
- $555.00
- Sale price
- $555.00
- Regular price
-
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Product Description P/N: FSTF24-S US
Description
The Belimo FSTF24-S US is a spring-return actuator designed for on/off operation of compatible fire and smoke dampers in commercial ventilation systems. Operating on 24 VAC/VDC, it delivers 18 in-lb of torque and includes two SPST auxiliary switches for end-position indication or interlock control. Its mechanical spring returns the damper to the configured fail-safe position when electrical power is interrupted.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC & Building Automation |
| Part Number | FSTF24-S US |
| Subcategory | Fire & Smoke Damper Actuators |
| Series / Actuator Type | FS Series; rotary; spring-return fail-safe |
| Control Type | On/Off |
| Nominal Supply Voltage | 24 VAC/VDC; 50/60 Hz with AC power |
| Operating Voltage Range | 19.2–28.8 VAC / 21.6–28.8 VDC |
| Power Consumption / Supply Sizing | Running: 2 W, 3 VA; holding: 1.5 W, 2 VA; transformer sizing: 5 VA |
| Rated Torque / Elevated-Temperature Rating | 18 in-lb; rated at 250°F for 30 minutes |
| Auxiliary Switches | 2 SPST; switching points at 10° and 80° |
| Auxiliary Contact Rating | 3 A resistive; 0.5 A inductive at 250 VAC |
| Rotation / Direction | 95°; motor and fail-safe direction selected by CW/CCW mounting |
| Motor / Fail-Safe Running Time | Motor: 75 seconds per 90°; spring return: under 25 seconds at 32–122°F |
| Power Connection | 3 ft, 18 AWG two-wire appliance cable with 1/2-inch NPT conduit connector |
| Auxiliary Switch Connection | 3 ft, 18 AWG six-wire appliance cable with 1/2-inch NPT conduit connector |
| Protection / Enclosure | Electronic overload protection; double insulated; NEMA 2; UL Enclosure Type 2 |
| Ambient Operating Conditions | 32–122°F; maximum 95% RH, non-condensing |
| Weight | 1.3 lb |
Information About FSTF24-S US
The FSTF24-S US is part of Belimo’s FS Series of actuators for use with approved UL 555 and UL 555S listed fire and smoke damper assemblies. During powered operation, the motor positions the damper while tensioning the internal return spring. Mounting orientation determines clockwise or counterclockwise operation, allowing the actuator to match the required damper movement. Electronic overload protection and double-insulated construction support operation throughout its 95° rotational travel.
Key Features:
- Fire and Smoke Application: Operates compatible fire, smoke, and combination dampers within approved assemblies.
- Spring-Return Operation: Returns the damper to its configured fail-safe position following power loss.
- Rated Torque: Delivers 18 in-lb, including the specified 250°F operating rating for 30 minutes.
- Dual Supply Compatibility: Accepts either 24 VAC or 24 VDC power.
- On/Off Control: Provides powered movement between the operating and fail-safe positions.
- Auxiliary Switching: Includes two SPST contacts with switching points at 10° and 80°.
- Position Signaling: Supports end-position indication and equipment interlock functions.
- Reversible Installation: Allows clockwise or counterclockwise operation through mounting orientation.
- Defined Motor Travel: Completes 90° of powered movement in 75 seconds.
- Fail-Safe Return Time: Provides spring-return travel in less than 25 seconds at 32–122°F.
- Electronic Protection: Protects the drive against overload throughout its operating rotation.
- Mechanical Indicator: Displays actuator position for local inspection.
The FSTF24-S US delivers the reliability and precision required for on/off positioning and fail-safe return of compatible fire and smoke dampers.
Description
The Belimo FSTF24-S US is a spring-return actuator designed for on/off operation of compatible fire and smoke dampers in commercial ventilation systems. Operating on 24 VAC/VDC, it delivers 18 in-lb of torque and includes two SPST auxiliary switches for end-position indication or interlock control. Its mechanical spring returns the damper to the configured fail-safe position when electrical power is interrupted.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC & Building Automation |
| Part Number | FSTF24-S US |
| Subcategory | Fire & Smoke Damper Actuators |
| Series / Actuator Type | FS Series; rotary; spring-return fail-safe |
| Control Type | On/Off |
| Nominal Supply Voltage | 24 VAC/VDC; 50/60 Hz with AC power |
| Operating Voltage Range | 19.2–28.8 VAC / 21.6–28.8 VDC |
| Power Consumption / Supply Sizing | Running: 2 W, 3 VA; holding: 1.5 W, 2 VA; transformer sizing: 5 VA |
| Rated Torque / Elevated-Temperature Rating | 18 in-lb; rated at 250°F for 30 minutes |
| Auxiliary Switches | 2 SPST; switching points at 10° and 80° |
| Auxiliary Contact Rating | 3 A resistive; 0.5 A inductive at 250 VAC |
| Rotation / Direction | 95°; motor and fail-safe direction selected by CW/CCW mounting |
| Motor / Fail-Safe Running Time | Motor: 75 seconds per 90°; spring return: under 25 seconds at 32–122°F |
| Power Connection | 3 ft, 18 AWG two-wire appliance cable with 1/2-inch NPT conduit connector |
| Auxiliary Switch Connection | 3 ft, 18 AWG six-wire appliance cable with 1/2-inch NPT conduit connector |
| Protection / Enclosure | Electronic overload protection; double insulated; NEMA 2; UL Enclosure Type 2 |
| Ambient Operating Conditions | 32–122°F; maximum 95% RH, non-condensing |
| Weight | 1.3 lb |
Information About FSTF24-S US
The FSTF24-S US is part of Belimo’s FS Series of actuators for use with approved UL 555 and UL 555S listed fire and smoke damper assemblies. During powered operation, the motor positions the damper while tensioning the internal return spring. Mounting orientation determines clockwise or counterclockwise operation, allowing the actuator to match the required damper movement. Electronic overload protection and double-insulated construction support operation throughout its 95° rotational travel.
Key Features:
- Fire and Smoke Application: Operates compatible fire, smoke, and combination dampers within approved assemblies.
- Spring-Return Operation: Returns the damper to its configured fail-safe position following power loss.
- Rated Torque: Delivers 18 in-lb, including the specified 250°F operating rating for 30 minutes.
- Dual Supply Compatibility: Accepts either 24 VAC or 24 VDC power.
- On/Off Control: Provides powered movement between the operating and fail-safe positions.
- Auxiliary Switching: Includes two SPST contacts with switching points at 10° and 80°.
- Position Signaling: Supports end-position indication and equipment interlock functions.
- Reversible Installation: Allows clockwise or counterclockwise operation through mounting orientation.
- Defined Motor Travel: Completes 90° of powered movement in 75 seconds.
- Fail-Safe Return Time: Provides spring-return travel in less than 25 seconds at 32–122°F.
- Electronic Protection: Protects the drive against overload throughout its operating rotation.
- Mechanical Indicator: Displays actuator position for local inspection.
The FSTF24-S US delivers the reliability and precision required for on/off positioning and fail-safe return of compatible fire and smoke dampers.
