Radial piston pump with adjustable delivery - uses control valve combining pressure cut-off and pressure limiting functions

摘要

The adjustable radial piston pump has the delivery flow matched to the operating conditions having a common pre-control valve (220) for the adjustment of conjugated values for the pressure boundaries of the pressure cut-off on the one hand and at the pressure limiting valve on the other. The pre-control valve is joined via a pipe (50) with a limit valve (410) which has a val ve piston (100) with a circular surface (101) and two annular surfaces (102 103) of the same area arranged such that they are subject to combinations of operating pressures (A and B). ADVANTAGE - Radial piston pump in which the pressure regulation is achieved by a low-loss control circuit.