Servovalve

A servovalve comprising:

• a fluid transfer valve assembly comprising a primary fluid supply port and a control port;
• a moveable valve spool arranged to regulate flow of fluid through a first fluid pathway from the primary fluid supply port to the control port;
• and
• a jet pipe assembly configured to axially move the spool relative to the fluid transfer valve assembly in response to a control signal to regulate the fluid flow along the first fluid pathway, wherein the jet pipe assembly comprises a steerable nozzle from which fluid is directed to the ends of the spool in an amount determined by the control signal;
• wherein the spool further comprises an opening and an interior passage fluidly coupling the opening to the jet pipe assembly via a second fluid pathway for supplying fluid to the nozzle;
• and
• wherein the first fluid pathway is fluidly isolated from the second fluid pathway within the spool;
• wherein the fluid transfer valve assembly further comprises a secondary fluid supply conduit having a first end configured to be fluidly coupled to a source of pressurised fluid and a second end coupled to a secondary fluid supply port adjacent the opening of the spool.