Woodward VariStroke-II Actuator
| Functions |
Linear electro-hydraulic actuator for steam turbine control
valves or valve racks Precise valve positioning for turbine speed and load control Accepts 4–20 mA or CANopen demand signals Supports redundant control Fast slew response Failsafe operation with internal return spring |
|---|---|
| Name | Woodward VariStroke-II Electro-hydraulic Actuator |
| Auxiliary Voltage | 90–150 V DC |
| Actuator Output | Linear actuator; 50–457 mm stroke and 450–18,000 kg max stall force @ 35 bar (model dependent) |
| Digital Inputs | 1 isolated discrete input (Run / Enable) |
| Digital Outputs | 2 relay-driver outputs (Alarm & Trip) |
| Analog Inputs | 1 isolated 4–20 mA input |
| Analog Outputs | 1 × 4–20 mA position output |
| CAN Communication Ports | 2 CANopen dual-redundant ports |
| RS485 / Service Port | 1 × RS-232 service port |
| Ethernet Ports | N/A |
| Mounting Type | Any attitude; bolt pattern depends on model |
| Nominal Frequency | N/A |
| Degree of Protection | IP66 |
