I. Model Meaning (Compared with D631K771C)D631: 631 Series Two-stage Mechanical ...

The Woodward 5434-334 is a 505-series microprocessor‑based digital speed/load co ...

I. Model MeaningD631: 631 Series Two-stage Mechanical Feedback Servo ValveK: Exp ...

The Woodward 5432-157 is a 505-series digital microprocessor‑based governor/cont ...

I. Model MeaningD631: 631 Series Two-stage Mechanical Feedback Servo ValveF550: ...

The Woodward 5432-039 is a microprocessor‑based digital governor / controller fo ...