Double diaphragm pump
APEXS series Weir Minerals

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This new and patented pumping concept uniquely combines the best of proven technologies creating a new family of slurry handling pumping systems. Handling fluids contaminated with solids is generally economical with crankshaft driven diaphragm style pumps. Highly and extreme viscous slurries are typically handled by hydraulically operated piston style pumps.

The GEHO® APEXS technology combines the two joining diaphragm (hose) technology with a hydraulic power pack. This enables the pump to operate with very large single stroke positive displacement volumes at low cycle rates and relatively high pump discharge pressures.

The APEXS system uses two fluid pumping chambers operating in sequence, each with a hose (diaphragm) inside. These are combined with a set of non-return valves and a hydraulic power pack to form the basic pumping system. Fluid is fed inside the hose from a feeder tank. The power pack supplies pressurized oil flow around each slurry filled hose (within the hose chamber) to force the hose to empty in a peristaltic style motion.

By applying an accelerated hose filling sequence and chamber pre-compression the pump system can operate virtually pulsation free at the discharge side. The APEXS is a modular concept which can be sacled to the application requirements.