Flexible impellers handle low and high viscosity fluids, gels and pastes and carefully can handle fluids containing hard and soft solids. 

ADVANTAGES OF A FLEXIBLE IMPELLER PUMP 

COST EFFECTIVE: Is an economical alternative to many other pump types.
GENTLE: Carefully can handle fluids containing hard and soft solids, up to 3/4"size.
VISCOSITY: Flexible impellers handle from low and high viscosity fluids, gels, and pastes up to 20,000 CP according to the RPM.
SELF-PRIMING: Are capable to lift from a depth up to 15 feet.
CIP RETURN: Can handle air and gas contained products which cannot be pumped by general centrifugal pumps.
REVERSIBLE OPERATION: The pump can work in both directions.
MAINTENANCE: Easily dis-assembled and clean.

HOW OFTEN SHOULD THE IMPELLER BE REPLACED?

Flexible Impellers can last around 3,000 to 4,000 hours or 2 to 3 years at ambient temperature @ 1,450 rpm

Impellers can be damaged by debris, incompatible chemicals, and especially by running dry.

Flexible impeller pumps work best when run regularly.