摘要:
A servo valve comprises a manifold 2 formed using an additive manufacturing (3D printing) technique. The manifold 2 may include a cylindrical cavity for receiving a valve spool 12 and a plurality of curvilinear and/or non-circular galleries 4,6,8,10. Additional features such as filters (32, figures 2a & 2b) and non-return valves (201, figure 5) may be integrally formed during the additive manufacturing process.