Siemens 587-104 Predator VAV Actuator (44 lb-in, 90-sec, 3/8-5/8″ Shaft)
Overview
The Siemens 587-104 Predator VAV Actuator is a high-performance electric actuator built for variable air volume (VAV) dampers. It provides 44 lb-in torque, a runtime of 90 seconds to move full 90° (open to close), and fits shafts sized 3/8 to 5/8 inches. With a compact body (~3 lbs and ~2×2×2 in), it’s ideal for tight installations.
Key Features & Benefits
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44 lb-in torque delivers enough force for demanding VAV damper duties. Apex Controls+1
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Fast travel: 90 seconds for full 90° motion gives reliable, predictable control. Apex Controls+1
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Fits standard damper shafts (3/8-5/8″) for easier replacement and compatibility. Apex Controls+1
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Compact size (~2×2×2 in) and reasonable weight (~3 lbs) makes mounting easier. Apex Controls
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Predator family/good OEM support from Siemens.
Technical Specifications
| Specification | Detail |
|---|---|
| Brand / Series | Siemens Predator VAV Actuator |
| Model / Part Number | 587-104 |
| Torque (Holding / Output) | 44 lb-in |
| Shaft Size | 3/8- to 5/8-inch diameter |
| Runtime for 90° Move | 90 seconds (for full open/close) |
| Weight | ~ 3 lbs |
| Dimensions | ~ 2 × 2 × 2 in |
| Application Type | VAV (Variable Air Volume) dampers |
| Mounting / Fit | Direct coupled or shaft mount with matching shaft size |
Applications
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Used on VAV dampers in commercial HVAC systems for airflow control.
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Ideal when a damper actuator with solid torque and moderate speed is needed.
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Replacement/upgrades where OEM predator actuators apply.
Installation & Best Practices
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Ensure the shaft matches size (3/8-5/8”) to avoid misalignment or slippage.
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Confirm the actuator travel time and check clearance for full 90° movement.
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Proper wiring and power supply as per Siemens’ requirements.
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Regular inspection for damper operation, alignment, and actuator mounting.
Why Buy From Apex Controls
Apex Controls supplies genuine Siemens Predator 587-104 actuators with verified specs. You get fast shipping, reliable OEM quality, and expert tech support to ensure you get the right actuator for your system.



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