Description
1. At-A-Glance Executive Brief
- Model: 8516-180 (ProAct Series)
- Brand: Woodward
- Part Type: Electric Valve / Fuel Actuator
- Lifecycle Status: Active / Standard Support Line
- Weight: 8.5 kg
- Core Application: Precise fuel valve and steam/gas turbine positioning
2. Technical Introduction
A sluggish or binding fuel valve actuator on an industrial turbine can degrade speed control response, cause severe load oscillations, and force an unplanned unit trip.
The Woodward 8516-180 is a heavy-duty ProAct electric actuator engineered to provide high-torque, rapid-response positioning for industrial steam and gas turbine fuel valves or diesel engine racks. Built with brushless motor technology and robust internal feedback sensors, it translates low-level controller signals into precise mechanical output movements even in high-vibration environments. Deploying this drop-in replacement actuator restores tight governing control and eliminates hysteresis loops across critical turbomachinery fuel lines.
Engineer’s Takeaway: Procuring a verified original Woodward 8516-180 ensures exact linkage geometry, stroke length, and electrical signal compatibility, avoiding complex mechanical retrofit work during outage windows.
3. Core Technical Specifications
| Parameter | Value |
| Manufacturer | Woodward |
| Model / Part Number | ProAct Series / 8516-180 |
| Actuator Type | Electric Servo / Valve Actuator |
| Operating Voltage | 24 VDC nominal auxiliary power |
| Input Signal | Isolated proportional driver command signals |
| Feedback Sensor | Integrated position feedback transducer |
| Enclosure Rating | Heavy-duty industrial weather-resistant housing |
| Operating Temperature | -40°C to +85°C harsh environment rating |
4. Field Engineer’s Tech Notes
- Linkage Alignment and Backlash Check: Verify that mechanical linkage arms and rod ends are properly aligned with the valve stem before locking down the mounting bolts. Any angular misalignment or excessive mechanical backlash will accelerate internal bearing wear and cause position hunting.
- Power Supply and Cabling Sizing: Ensure that heavy-gauge DC supply cables are used to feed the actuator driver. Long wire runs with inadequate cross-sectional area will cause voltage drop under high-torque transients, triggering low-voltage faults on the internal drive electronics.
5. Adaptive QA & Testing Protocol
Every unit undergoes comprehensive bench validation prior to dispatch. For the Woodward 8516-180, our technicians mount the actuator on a specialized test rig to verify full stroke travel, position feedback linearity, and step-response actuation speed. We test internal motor winding resistance and verify dynamic positioning accuracy under simulated control signals. Functional test reports or pre-shipment video verification can be provided upon request.
6. Buyer’s FAQ
- Are these actuators supplied as New Surplus or refurbished?We stock both factory-sealed New Surplus (NSFP) and fully bench-tested, static-safe overhauled units. Condition status is explicitly marked on every quote.
- What warranty coverage comes with this part?All replacement actuators are backed by a standard 12-month operational warranty from the date of invoice.
- How fast can this actuator ship to minimize plant downtime?In-stock items ship same-day via priority air courier services to global destinations, mitigating critical path delays during emergency outage windows.
- Is this actuator a direct physical and electrical match for older ProAct units?Yes, the 8516-180 maintains exact OEM mounting bolt patterns, shaft dimensions, and electrical pinouts for seamless drop-in replacement.
