Document Type and Number:
Japanese Patent JPH0243031
Kind Code:
B2
Abstract:
A dual-unit pump, e.g., a rolling diaphragm piston pump, suitable for pumping an abrasive high-viscosity slurry, is adapted to operate at a constant flow rate by means for detecting and correcting a pressure differential in the two units before the units switch from the pumping cycle to the filling cycle and vice versa. The flow of liquids is controlled by valves of the type which switch the flow to and from the units with essentially no volume change in the liquid inlet and outlet lines.
Application Number:
JP23253384A
Publication Date:
September 26, 1990
Filing Date:
November 06, 1984
Export Citation:
International Classes:
F04B9/109; F04B9/117; F04B11/00; F04B15/02; F04B43/06