Control System of Piston Pumps
A relation between slurry-pressure/-capacity an oil-pressure/-capacity via ratio i=D²/d² is given by the design of the type KH. Therefore all control sytems are located on the “clean“ oil-side.
- Start-stop-valve manually operated
- pressure relief valve manually adjustable
- hydro-pump manually adjustable. Piston pump KH is
a variable displacement pump, Q=0 ... Q=Qmax.
R1: Start-stop-valve with remote-control
R2: Adjustable Operating Pressure
R3: Capacity control system
R4: Pressure control system
A hydro-pump with pressure-control-system is used for driving the machine. When system-pressure is lower than the pressure compensator setting, the pump will deliver maximum capacity. When the system pressure reaches the adjusted pressure, the capacity will be reduced without losses of energy and the pressure will be maintained. A capacity of Q=0 and maintaining pressure is possible, too.
This control system is sensible when operating permanently
in part B of the characteristic line, as it is necessary for
feeding a filter press.