Creating custom vectors on plane

Hi

I have the time averaged X,Y,Z velocity of a pipe flow and I have exported them into paraview format. Now i want to draw the vectors on the plane or cross-section of the pipe with my time averaged vectors field. I have created a calculator as: ihatxvel+jhatyvel+khat*zvel, and using surface vectors but it is not plotting them. What is the issue?

I am also seeing a weird thing where I can see both the surface vectors and the axial vectors, but i want to see only the surface vectors.