rexroth Variable displacement pumps A10V(S)O & (A)A10VSO (Series 31 Variable displacement axial piston pump in swashplate design is designed for open circuit applications. It can be used in mobile and industrial applications. Flow is proportional to the drive speed and the displacement. Sizes 10 to 140 Axial piston swashplate design Open circuit Series 31 (sizes 18, 28, 45, 71, 100, 140) Combination of pumps of up to the same size can be mounted to the through-drive (not with size 10)