  We study an adiabatic quantum pump effect in a two terminal graphene device
with two oscillating square electric barriers and a stationary magnetic barrier
using the scattering matrix approach. The model employs the low-energy Dirac
approximation and incorporates the possible existence of a finite band gap in
graphene spectrum. We show that in this case valley-polarized and pure valley
currents can be pumped due to the valley symmetry breaking. For a
\delta-function magnetic barrier we present analytical expressions for bilinear
total and valley pumping responses. These results are compared to numerical
ones for a double \delta-function, a square and a triple square magnetic
barriers.
