3d model of the mixer Newarc Aqua

in scene 4 multi sub-object material:
matte black (on the model)
white matt chrome gold (on the spheres)

model with modifier TurboSmooth

Units: Millimeters

Who works in the V-Ray version lower than 3.1 be careful in the materials in the BRDF section there is a Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable to you.