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MSRP: $1,199.00
Price: $449.63
You Save: $749.37 (62 %)


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Actuator Customization180 characters remaining
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Belimo Part Number: EFB24-S

Torque: 270 in-lb [30 Nm]

Power Supply: 24 VAC 20%, 50/60 Hz, 24 VDC +20% / -10%

Running Time (motor): 75 seconds

Running Time (fail-safe): <20 sec @ -4 deg.F to +122 deg.F [-20 deg.C to +50 deg.C], <60 sec @ -22 deg.F [-30 deg.C]

Technical Cutsheet  EFB & EFX actuators, Technical Document
Installation Instructions Product Broshure

Fail-Safe Spring Return
Torque 270 in-lb [30 Nm]
Control Input On/Off
Input Impedance N/A
Position Feedback --
Running Time (motor) 75 seconds
Running Time (fail-safe) <20 sec @ -4°F to +122°F [-20°C to +50°C], <60 sec @ -22°F [-30°C]
Auxiliary Switch 2 x SPDT 3A (0.5A) @ 250 VAC, UL approved, one set at +10°, one adjustable 10° to 85°
Power Supply 24 VAC ± 20%, 50/60 Hz, 24 VDC +20% / -10%
Power Consumption Running: 9.5 W; Holding: 4.5 W
Transformer Sizing 16 VA (Class 2 power source)
Electrical Connection Two 3 ft, 18 GA appliance cables with 1/2" conduit connectors
Overload Protection Electronic throughout 0° to 95° rotation
Shaft Diameter 1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert
Angle of Rotation 95° (adjustable with mechanical end stop, 35 to 95°)
Direction of Rotation (motor) Reversible with CW/CCW mounting
Direction of Rotation (fail-safe) Reversible with CW/CCW mounting
Position Indication Visual indicator, 0° to 95° (0° is spring return position)
Manual Override 5 mm hex crank (3/16" Allen), supplied
Humidity Max. 95% RH non-condensing
Ambient Temperature -22°F to +122°F [-30°C TO +50°C]
Ambient Temperature (safety) --
Storage Temperature -40°F to +176°F [-40°C TO +80°C]
Noise Level 56.5 dB (A) motor @ 75 seconds, 71.4 dB (A) spring return
Housing Material Aluminum die cast and plastic casing
Housing NEMA 2, IP54, Enclosure Type2
Agency Listing cULus acc. To UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. To 2004/108/EC & 2006/95/EC
Quality Standards ISO 9001
Weight 10.14 lbs (4.6 kg)
The EF actuator utilizes rugged components in a pressure cast aluminum housing for added strength and reliability. It offers a high torque output of 270 in-lbs and a NEMA 4 option to meet tough environmental conditions found in many HVAC applications.

The EF actuator was developed to satisfy high torque applications with a single actuator. The EF can take the place of two classic AF actuators in a piggy-back mounted application; simplifying wiring and mounting requirements while reducing material and installation costs. The NEMA 4 protection feature allows complete access to change the direction of rotation and allows locking or manually overriding the actuator.

The EF provides a cost effective and flexible solution that will deliver years of dependable performance over a wide range of operating conditions.

Item Number: EFB24-S
Manufacturer: Belimo
Manufacturer Part No: EFB24-S

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