In pump engineering, bridging is a problem which may occur when pumping liquids with specific properties. It typically occurs with viscous fluids behaving like solids. 

Bridges can occur if a pump tries to move a viscous fluid. This means the liquid in the pump's suction line or inlet area clumps or solidifies, obstructing the fluid flow. NETZSCH Pumps & Systems, the global specialist in handling complex media, has developed the NEMO® BF hopper shaped pump with aBP-Module®, which prevents bridging. 

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