This proposal concerns the whole replacement of the current pilot valve assembly, cylinder, actuator and feedback linkage with one Woodward simplified system VariStroke-I.
The VariStroke-I is a linear electro-hydraulic actuator that is designed to provide the linear actuation force to operate steam turbine control valves or valve racks. It utilizes a double-acting power cylinder with integrated electronic driver module, servo valve and MLDT-based position feedback sensors.